diff --git a/.asf.yaml b/.asf.yaml
index 5f947d9..9d64b66 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -1,19 +1,17 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # https://cwiki.apache.org/confluence/display/INFRA/.asf.yaml+features+for+git+repositories
 ---
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..d566d98
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,38 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
+name: "Airflow k8s operator"
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+jobs:
+  statics:
+    name: Static checks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-python@v1
+      - name: set PY
+        run: echo "::set-env name=PY::$(python -c 'import hashlib, sys;print(hashlib.sha256(sys.version.encode()+sys.executable.encode()).hexdigest())')"
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pre-commit
+          key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
+      - uses: pre-commit/action@v1.0.1
diff --git a/.gitignore b/.gitignore
index 0355059..c0791dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 cover.out
 pkg/controller/airflowbase/templates
 pkg/controller/airflowcluster/templates
+.idea/.*
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..1860a7b
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,75 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
+repos:
+  - repo: git://github.com/dnephin/pre-commit-golang
+    rev: master
+    hooks:
+      - id: go-fmt
+        exclude: ^vendor/.*$
+  - repo: local
+    hooks:
+      - id: yamllint
+        name: Check yaml files with yamllint
+        entry: yamllint -c yamllint-config.yaml
+        language: python
+        additional_dependencies: ['yamllint']
+        types: [yaml]
+        exclude: ^templates/.*$|^vendor/.*$
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.5.0
+    hooks:
+      - id: check-merge-conflict
+      - id: detect-private-key
+      - id: end-of-file-fixer
+        exclude: ^vendor/.*$
+      - id: mixed-line-ending
+      - id: check-executables-have-shebangs
+      - id: trailing-whitespace
+        exclude: ^vendor/.*$
+  - repo: https://github.com/Lucas-C/pre-commit-hooks
+    rev: v1.1.7
+    hooks:
+      - id: insert-license
+        name: Add license for all yaml files
+        exclude: ^vendor/.*$
+        types: [yaml]
+        args:
+          - --comment-style
+          - "|#|"
+          - --license-filepath
+          - license-templates/LICENSE.txt
+          - --fuzzy-match-generates-todo
+      - id: insert-license
+        name: Add license for all md files
+        files: \.md$
+        exclude: ^vendor/.*$
+        args:
+          - --comment-style
+          - "<!--|| -->"
+          - --license-filepath
+          - license-templates/LICENSE.txt
+          - --fuzzy-match-generates-todo
+      - id: insert-license
+        name: Add license for all go files
+        files: \.go$
+        exclude: ^vendor/.*$|^zz_generated.*$
+        args:
+          - --comment-style
+          - "//"
+          - --license-filepath
+          - license-templates/LICENSE.txt
+          - --fuzzy-match-generates-todo
diff --git a/Dockerfile b/Dockerfile
index 74eb9d7..240f095 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # Build the manager binary
 FROM golang:1.13 as builder
 
diff --git a/Makefile b/Makefile
index bf4d856..90fbeed 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 ifndef NOTGCP
   PROJECT_ID := $(shell gcloud config get-value project)
   ZONE := $(shell gcloud config get-value compute/zone)
diff --git a/README.md b/README.md
index 752df94..789f5c9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,20 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
 # Airflow On K8S Operator
 [![Go Report Card](https://goreportcard.com/badge/github.com/apache/airflow-on-k8s-operator)](https://goreportcard.com/report/github.com/apache/airflow-on-k8s-operator)
 
diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index c17cd03..6f2cddb 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -1,25 +1,23 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Google Cloud Build script
-#
 
+---
 steps:
-- name: 'gcr.io/cloud-builders/docker'
-  args: ['build', '.', '-t', 'gcr.io/airflow-operator/airflow-operator:v1alpha2', '-t', 'gcr.io/airflow-operator/airflow-operator:$REVISION_ID', '-f', 'Dockerfile' ]
+  - name: 'gcr.io/cloud-builders/docker'
+    args: ['build', '.', '-t', 'gcr.io/airflow-operator/airflow-operator:v1alpha2', '-t', 'gcr.io/airflow-operator/airflow-operator:$REVISION_ID', '-f', 'Dockerfile']
 
 images: ['gcr.io/airflow-operator/airflow-operator:v1alpha2', 'gcr.io/airflow-operator/airflow-operator:$REVISION_ID']
diff --git a/config/certmanager/certificate.yaml b/config/certmanager/certificate.yaml
index 237c937..73dfc6e 100644
--- a/config/certmanager/certificate.yaml
+++ b/config/certmanager/certificate.yaml
@@ -1,6 +1,23 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # The following manifests contain a self-signed issuer CR and a certificate CR.
 # More document can be found at https://docs.cert-manager.io
 # WARNING: Targets CertManager 0.11 check https://docs.cert-manager.io/en/latest/tasks/upgrading/index.html for breaking changes
+
+---
 apiVersion: cert-manager.io/v1alpha2
 kind: Issuer
 metadata:
@@ -8,6 +25,7 @@
   namespace: system
 spec:
   selfSigned: {}
+
 ---
 apiVersion: cert-manager.io/v1alpha2
 kind: Certificate
@@ -17,9 +35,9 @@
 spec:
   # $(SERVICE_NAME) and $(SERVICE_NAMESPACE) will be substituted by kustomize
   dnsNames:
-  - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc
-  - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc.cluster.local
+    - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc
+    - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc.cluster.local
   issuerRef:
     kind: Issuer
     name: selfsigned-issuer
-  secretName: webhook-server-cert # this secret will not be prefixed, since it's not managed by kustomize
+  secretName: webhook-server-cert  # this secret will not be prefixed, since it's not managed by kustomize
diff --git a/config/certmanager/kustomization.yaml b/config/certmanager/kustomization.yaml
index bebea5a..0e65bcc 100644
--- a/config/certmanager/kustomization.yaml
+++ b/config/certmanager/kustomization.yaml
@@ -1,5 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 resources:
-- certificate.yaml
+  - certificate.yaml
 
 configurations:
-- kustomizeconfig.yaml
+  - kustomizeconfig.yaml
diff --git a/config/certmanager/kustomizeconfig.yaml b/config/certmanager/kustomizeconfig.yaml
index 90d7c31..d10b156 100644
--- a/config/certmanager/kustomizeconfig.yaml
+++ b/config/certmanager/kustomizeconfig.yaml
@@ -1,16 +1,32 @@
-# This configuration is for teaching kustomize how to update name ref and var substitution 
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This configuration is for teaching kustomize how to update name ref and var substitution
+---
 nameReference:
-- kind: Issuer
-  group: cert-manager.io
-  fieldSpecs:
-  - kind: Certificate
+  - kind: Issuer
     group: cert-manager.io
-    path: spec/issuerRef/name
+    fieldSpecs:
+      - kind: Certificate
+        group: cert-manager.io
+        path: spec/issuerRef/name
 
 varReference:
-- kind: Certificate
-  group: cert-manager.io
-  path: spec/commonName
-- kind: Certificate
-  group: cert-manager.io
-  path: spec/dnsNames
+  - kind: Certificate
+    group: cert-manager.io
+    path: spec/commonName
+  - kind: Certificate
+    group: cert-manager.io
+    path: spec/dnsNames
diff --git a/config/crd/bases/airflow.apache.org_airflowbases.yaml b/config/crd/bases/airflow.apache.org_airflowbases.yaml
index 488ac23..ad21748 100644
--- a/config/crd/bases/airflow.apache.org_airflowbases.yaml
+++ b/config/crd/bases/airflow.apache.org_airflowbases.yaml
@@ -1,3 +1,17 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 ---
 apiVersion: apiextensions.k8s.io/v1beta1
@@ -94,8 +108,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchFields:
@@ -128,8 +142,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                             type: object
@@ -139,8 +153,8 @@
                             format: int32
                             type: integer
                         required:
-                        - preference
-                        - weight
+                          - preference
+                          - weight
                         type: object
                       type: array
                     requiredDuringSchedulingIgnoredDuringExecution:
@@ -190,8 +204,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchFields:
@@ -224,14 +238,14 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                             type: object
                           type: array
                       required:
-                      - nodeSelectorTerms
+                        - nodeSelectorTerms
                       type: object
                   type: object
                 podAffinity:
@@ -290,8 +304,8 @@
                                             type: string
                                           type: array
                                       required:
-                                      - key
-                                      - operator
+                                        - key
+                                        - operator
                                       type: object
                                     type: array
                                   matchLabels:
@@ -322,7 +336,7 @@
                                   is running. Empty topologyKey is not allowed.
                                 type: string
                             required:
-                            - topologyKey
+                              - topologyKey
                             type: object
                           weight:
                             description: weight associated with matching the corresponding
@@ -330,8 +344,8 @@
                             format: int32
                             type: integer
                         required:
-                        - podAffinityTerm
-                        - weight
+                          - podAffinityTerm
+                          - weight
                         type: object
                       type: array
                     requiredDuringSchedulingIgnoredDuringExecution:
@@ -385,8 +399,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchLabels:
@@ -416,7 +430,7 @@
                               topologyKey is not allowed.
                             type: string
                         required:
-                        - topologyKey
+                          - topologyKey
                         type: object
                       type: array
                   type: object
@@ -478,8 +492,8 @@
                                             type: string
                                           type: array
                                       required:
-                                      - key
-                                      - operator
+                                        - key
+                                        - operator
                                       type: object
                                     type: array
                                   matchLabels:
@@ -510,7 +524,7 @@
                                   is running. Empty topologyKey is not allowed.
                                 type: string
                             required:
-                            - topologyKey
+                              - topologyKey
                             type: object
                           weight:
                             description: weight associated with matching the corresponding
@@ -518,8 +532,8 @@
                             format: int32
                             type: integer
                         required:
-                        - podAffinityTerm
-                        - weight
+                          - podAffinityTerm
+                          - weight
                         type: object
                       type: array
                     requiredDuringSchedulingIgnoredDuringExecution:
@@ -573,8 +587,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchLabels:
@@ -604,7 +618,7 @@
                               topologyKey is not allowed.
                             type: string
                         required:
-                        - topologyKey
+                          - topologyKey
                         type: object
                       type: array
                   type: object
@@ -654,11 +668,11 @@
                             and restore e.g. s3, oci-s3-compat, aws-s3, gce-s3, etc.
                           type: string
                       required:
-                      - storageprovider
+                        - storageprovider
                       type: object
                   required:
-                  - schedule
-                  - storage
+                    - schedule
+                    - storage
                   type: object
                 backupVolumeClaimTemplate:
                   description: BackupVolumeClaimTemplate allows a user to specify
@@ -715,8 +729,8 @@
                               description: Name is the name of resource being referenced
                               type: string
                           required:
-                          - kind
-                          - name
+                            - kind
+                            - name
                           type: object
                         resources:
                           description: 'Resources represents the minimum resources
@@ -770,8 +784,8 @@
                                       type: string
                                     type: array
                                 required:
-                                - key
-                                - operator
+                                  - key
+                                  - operator
                                 type: object
                               type: array
                             matchLabels:
@@ -849,8 +863,8 @@
                                   a valid value of PersistentVolumeClaimCondition.Type
                                 type: string
                             required:
-                            - status
-                            - type
+                              - status
+                              - type
                             type: object
                           type: array
                         phase:
@@ -952,8 +966,8 @@
                               description: Name is the name of resource being referenced
                               type: string
                           required:
-                          - kind
-                          - name
+                            - kind
+                            - name
                           type: object
                         resources:
                           description: 'Resources represents the minimum resources
@@ -1007,8 +1021,8 @@
                                       type: string
                                     type: array
                                 required:
-                                - key
-                                - operator
+                                  - key
+                                  - operator
                                 type: object
                               type: array
                             matchLabels:
@@ -1086,8 +1100,8 @@
                                   a valid value of PersistentVolumeClaimCondition.Type
                                 type: string
                             required:
-                            - status
-                            - type
+                              - status
+                              - type
                             type: object
                           type: array
                         phase:
@@ -1104,7 +1118,7 @@
               type: object
             postgres:
               description: 'PostgresSpec defines the attributes and desired state
-                of Postgres Component TODO - minimum spec needed .. for now it is
+                  of Postgres Component TODO - minimum spec needed .. for now it is
                 version: "" need to consider empty mysql'
               properties:
                 image:
@@ -1201,8 +1215,8 @@
                               description: Name is the name of resource being referenced
                               type: string
                           required:
-                          - kind
-                          - name
+                            - kind
+                            - name
                           type: object
                         resources:
                           description: 'Resources represents the minimum resources
@@ -1256,8 +1270,8 @@
                                       type: string
                                     type: array
                                 required:
-                                - key
-                                - operator
+                                  - key
+                                  - operator
                                 type: object
                               type: array
                             matchLabels:
@@ -1335,8 +1349,8 @@
                                   a valid value of PersistentVolumeClaimCondition.Type
                                 type: string
                             required:
-                            - status
-                            - type
+                              - status
+                              - type
                             type: object
                           type: array
                         phase:
@@ -1388,10 +1402,10 @@
                   description: Version defines the SQL Proxy docker image version.
                   type: string
               required:
-              - instance
-              - project
-              - region
-              - type
+                - instance
+                - project
+                - region
+                - type
               type: object
             storage:
               description: Spec for NFS component.
@@ -1475,8 +1489,8 @@
                               description: Name is the name of resource being referenced
                               type: string
                           required:
-                          - kind
-                          - name
+                            - kind
+                            - name
                           type: object
                         resources:
                           description: 'Resources represents the minimum resources
@@ -1530,8 +1544,8 @@
                                       type: string
                                     type: array
                                 required:
-                                - key
-                                - operator
+                                  - key
+                                  - operator
                                 type: object
                               type: array
                             matchLabels:
@@ -1609,8 +1623,8 @@
                                   a valid value of PersistentVolumeClaimCondition.Type
                                 type: string
                             required:
-                            - status
-                            - type
+                              - status
+                              - type
                             type: object
                           type: array
                         phase:
@@ -1652,8 +1666,8 @@
                         format: int32
                         type: integer
                     required:
-                    - currenthealthy
-                    - desiredhealthy
+                      - currenthealthy
+                      - desiredhealthy
                     type: object
                   status:
                     description: 'Status. Values: InProgress, Ready, Unknown'
@@ -1681,10 +1695,10 @@
                         format: int32
                         type: integer
                     required:
-                    - currentcount
-                    - progress
-                    - readycount
-                    - replicas
+                      - currentcount
+                      - progress
+                      - readycount
+                      - replicas
                     type: object
                 type: object
               type: array
@@ -1717,8 +1731,8 @@
                     description: Type of condition.
                     type: string
                 required:
-                - status
-                - type
+                  - status
+                  - type
                 type: object
               type: array
             observedGeneration:
@@ -1731,9 +1745,9 @@
       type: object
   version: v1alpha1
   versions:
-  - name: v1alpha1
-    served: true
-    storage: true
+    - name: v1alpha1
+      served: true
+      storage: true
 status:
   acceptedNames:
     kind: ""
diff --git a/config/crd/bases/airflow.apache.org_airflowclusters.yaml b/config/crd/bases/airflow.apache.org_airflowclusters.yaml
index 71cc63b..1fc064e 100644
--- a/config/crd/bases/airflow.apache.org_airflowclusters.yaml
+++ b/config/crd/bases/airflow.apache.org_airflowclusters.yaml
@@ -1,3 +1,17 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 ---
 apiVersion: apiextensions.k8s.io/v1beta1
@@ -94,8 +108,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchFields:
@@ -128,8 +142,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                             type: object
@@ -139,8 +153,8 @@
                             format: int32
                             type: integer
                         required:
-                        - preference
-                        - weight
+                          - preference
+                          - weight
                         type: object
                       type: array
                     requiredDuringSchedulingIgnoredDuringExecution:
@@ -190,8 +204,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchFields:
@@ -224,14 +238,14 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                             type: object
                           type: array
                       required:
-                      - nodeSelectorTerms
+                        - nodeSelectorTerms
                       type: object
                   type: object
                 podAffinity:
@@ -290,8 +304,8 @@
                                             type: string
                                           type: array
                                       required:
-                                      - key
-                                      - operator
+                                        - key
+                                        - operator
                                       type: object
                                     type: array
                                   matchLabels:
@@ -322,7 +336,7 @@
                                   is running. Empty topologyKey is not allowed.
                                 type: string
                             required:
-                            - topologyKey
+                              - topologyKey
                             type: object
                           weight:
                             description: weight associated with matching the corresponding
@@ -330,8 +344,8 @@
                             format: int32
                             type: integer
                         required:
-                        - podAffinityTerm
-                        - weight
+                          - podAffinityTerm
+                          - weight
                         type: object
                       type: array
                     requiredDuringSchedulingIgnoredDuringExecution:
@@ -385,8 +399,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchLabels:
@@ -416,7 +430,7 @@
                               topologyKey is not allowed.
                             type: string
                         required:
-                        - topologyKey
+                          - topologyKey
                         type: object
                       type: array
                   type: object
@@ -478,8 +492,8 @@
                                             type: string
                                           type: array
                                       required:
-                                      - key
-                                      - operator
+                                        - key
+                                        - operator
                                       type: object
                                     type: array
                                   matchLabels:
@@ -510,7 +524,7 @@
                                   is running. Empty topologyKey is not allowed.
                                 type: string
                             required:
-                            - topologyKey
+                              - topologyKey
                             type: object
                           weight:
                             description: weight associated with matching the corresponding
@@ -518,8 +532,8 @@
                             format: int32
                             type: integer
                         required:
-                        - podAffinityTerm
-                        - weight
+                          - podAffinityTerm
+                          - weight
                         type: object
                       type: array
                     requiredDuringSchedulingIgnoredDuringExecution:
@@ -573,8 +587,8 @@
                                         type: string
                                       type: array
                                   required:
-                                  - key
-                                  - operator
+                                    - key
+                                    - operator
                                   type: object
                                 type: array
                               matchLabels:
@@ -604,7 +618,7 @@
                               topologyKey is not allowed.
                             type: string
                         required:
-                        - topologyKey
+                          - topologyKey
                         type: object
                       type: array
                   type: object
@@ -658,8 +672,7 @@
                       description: Bucket describes the GCS bucket
                       type: string
                     once:
-                      description: Once syncs initially and quits (use init container
-                        instead of sidecar)
+                      description: Once syncs initially and quits (use init container instead of sidecar)
                       type: boolean
                   type: object
                 git:
@@ -670,8 +683,7 @@
                       description: Branch describes the branch name to be synced
                       type: string
                     cred:
-                      description: Reference to git credentials (user, password, ssh
-                        etc)
+                      description: Reference to git credentials (user, password, ssh etc)
                       properties:
                         name:
                           description: 'Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names
@@ -692,7 +704,7 @@
                       description: User for git access
                       type: string
                   required:
-                  - repo
+                    - repo
                   type: object
                 nfspv:
                   description: NfsPVSpec
@@ -747,8 +759,8 @@
                               description: Name is the name of resource being referenced
                               type: string
                           required:
-                          - kind
-                          - name
+                            - kind
+                            - name
                           type: object
                         resources:
                           description: 'Resources represents the minimum resources
@@ -802,8 +814,8 @@
                                       type: string
                                     type: array
                                 required:
-                                - key
-                                - operator
+                                  - key
+                                  - operator
                                 type: object
                               type: array
                             matchLabels:
@@ -881,8 +893,8 @@
                                   a valid value of PersistentVolumeClaimCondition.Type
                                 type: string
                             required:
-                            - status
-                            - type
+                              - status
+                              - type
                             type: object
                           type: array
                         phase:
@@ -916,7 +928,7 @@
                         restore e.g. s3, oci-s3-compat, aws-s3, gce-s3, etc.
                       type: string
                   required:
-                  - storageprovider
+                    - storageprovider
                   type: object
                 subdir:
                   description: DagSubdir is the directory under source where the dags
@@ -1035,8 +1047,8 @@
                                 format: int32
                                 type: integer
                             required:
-                            - currenthealthy
-                            - desiredhealthy
+                              - currenthealthy
+                              - desiredhealthy
                             type: object
                           status:
                             description: 'Status. Values: InProgress, Ready, Unknown'
@@ -1066,10 +1078,10 @@
                                 format: int32
                                 type: integer
                             required:
-                            - currentcount
-                            - progress
-                            - readycount
-                            - replicas
+                              - currentcount
+                              - progress
+                              - readycount
+                              - replicas
                             type: object
                         type: object
                       type: array
@@ -1103,8 +1115,8 @@
                             description: Type of condition.
                             type: string
                         required:
-                        - status
-                        - type
+                          - status
+                          - type
                         type: object
                       type: array
                     createTime:
@@ -1143,8 +1155,8 @@
                   description: 'Tier: Required. The service tier of the instance.'
                   type: string
               required:
-              - project
-              - region
+                - project
+                - region
               type: object
             nodeSelector:
               additionalProperties:
@@ -1252,8 +1264,8 @@
                               description: Name is the name of resource being referenced
                               type: string
                           required:
-                          - kind
-                          - name
+                            - kind
+                            - name
                           type: object
                         resources:
                           description: 'Resources represents the minimum resources
@@ -1307,8 +1319,8 @@
                                       type: string
                                     type: array
                                 required:
-                                - key
-                                - operator
+                                  - key
+                                  - operator
                                 type: object
                               type: array
                             matchLabels:
@@ -1386,8 +1398,8 @@
                                   a valid value of PersistentVolumeClaimCondition.Type
                                 type: string
                             required:
-                            - status
-                            - type
+                              - status
+                              - type
                             type: object
                           type: array
                         phase:
@@ -1531,8 +1543,8 @@
                         format: int32
                         type: integer
                     required:
-                    - currenthealthy
-                    - desiredhealthy
+                      - currenthealthy
+                      - desiredhealthy
                     type: object
                   status:
                     description: 'Status. Values: InProgress, Ready, Unknown'
@@ -1560,10 +1572,10 @@
                         format: int32
                         type: integer
                     required:
-                    - currentcount
-                    - progress
-                    - readycount
-                    - replicas
+                      - currentcount
+                      - progress
+                      - readycount
+                      - replicas
                     type: object
                 type: object
               type: array
@@ -1596,8 +1608,8 @@
                     description: Type of condition.
                     type: string
                 required:
-                - status
-                - type
+                  - status
+                  - type
                 type: object
               type: array
             observedGeneration:
@@ -1610,9 +1622,9 @@
       type: object
   version: v1alpha1
   versions:
-  - name: v1alpha1
-    served: true
-    storage: true
+    - name: v1alpha1
+      served: true
+      storage: true
 status:
   acceptedNames:
     kind: ""
diff --git a/config/crd/kustomization.yaml b/config/crd/kustomization.yaml
index b36028f..8d2be01 100644
--- a/config/crd/kustomization.yaml
+++ b/config/crd/kustomization.yaml
@@ -1,24 +1,40 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # This kustomization.yaml is not intended to be run by itself,
 # since it depends on service name and namespace that are out of this kustomize package.
 # It should be run by config/default
+---
 resources:
-- bases/airflow.apache.org_airflowbases.yaml
-- bases/airflow.apache.org_airflowclusters.yaml
+  - bases/airflow.apache.org_airflowbases.yaml
+  - bases/airflow.apache.org_airflowclusters.yaml
 # +kubebuilder:scaffold:crdkustomizeresource
 
 patchesStrategicMerge:
 # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix.
 # patches here are for enabling the conversion webhook for each CRD
-#- patches/webhook_in_airflowbases.yaml
-#- patches/webhook_in_airflowclusters.yaml
+# - patches/webhook_in_airflowbases.yaml
+# - patches/webhook_in_airflowclusters.yaml
 # +kubebuilder:scaffold:crdkustomizewebhookpatch
 
 # [CERTMANAGER] To enable webhook, uncomment all the sections with [CERTMANAGER] prefix.
 # patches here are for enabling the CA injection for each CRD
-#- patches/cainjection_in_airflowbases.yaml
-#- patches/cainjection_in_airflowclusters.yaml
+# - patches/cainjection_in_airflowbases.yaml
+# - patches/cainjection_in_airflowclusters.yaml
 # +kubebuilder:scaffold:crdkustomizecainjectionpatch
 
 # the following config is for teaching kustomize how to do kustomization for CRDs.
 configurations:
-- kustomizeconfig.yaml
+  - kustomizeconfig.yaml
diff --git a/config/crd/kustomizeconfig.yaml b/config/crd/kustomizeconfig.yaml
index 6f83d9a..3af3f61 100644
--- a/config/crd/kustomizeconfig.yaml
+++ b/config/crd/kustomizeconfig.yaml
@@ -1,17 +1,33 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # This file is for teaching kustomize how to substitute name and namespace reference in CRD
+---
 nameReference:
-- kind: Service
-  version: v1
-  fieldSpecs:
-  - kind: CustomResourceDefinition
-    group: apiextensions.k8s.io
-    path: spec/conversion/webhookClientConfig/service/name
+  - kind: Service
+    version: v1
+    fieldSpecs:
+      - kind: CustomResourceDefinition
+        group: apiextensions.k8s.io
+        path: spec/conversion/webhookClientConfig/service/name
 
 namespace:
-- kind: CustomResourceDefinition
-  group: apiextensions.k8s.io
-  path: spec/conversion/webhookClientConfig/service/namespace
-  create: false
+  - kind: CustomResourceDefinition
+    group: apiextensions.k8s.io
+    path: spec/conversion/webhookClientConfig/service/namespace
+    create: false
 
 varReference:
-- path: metadata/annotations
+  - path: metadata/annotations
diff --git a/config/crd/patches/cainjection_in_airflowbases.yaml b/config/crd/patches/cainjection_in_airflowbases.yaml
index baddfe2..c1505d8 100644
--- a/config/crd/patches/cainjection_in_airflowbases.yaml
+++ b/config/crd/patches/cainjection_in_airflowbases.yaml
@@ -1,5 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # The following patch adds a directive for certmanager to inject CA into the CRD
 # CRD conversion requires k8s 1.13 or later.
+---
 apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
diff --git a/config/crd/patches/cainjection_in_airflowclusters.yaml b/config/crd/patches/cainjection_in_airflowclusters.yaml
index 38562bb..bb0232c 100644
--- a/config/crd/patches/cainjection_in_airflowclusters.yaml
+++ b/config/crd/patches/cainjection_in_airflowclusters.yaml
@@ -1,5 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # The following patch adds a directive for certmanager to inject CA into the CRD
 # CRD conversion requires k8s 1.13 or later.
+---
 apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
diff --git a/config/crd/patches/webhook_in_airflowbases.yaml b/config/crd/patches/webhook_in_airflowbases.yaml
index 34f612f..c2aa9b0 100644
--- a/config/crd/patches/webhook_in_airflowbases.yaml
+++ b/config/crd/patches/webhook_in_airflowbases.yaml
@@ -1,5 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # The following patch enables conversion webhook for CRD
 # CRD conversion requires k8s 1.13 or later.
+---
 apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
diff --git a/config/crd/patches/webhook_in_airflowclusters.yaml b/config/crd/patches/webhook_in_airflowclusters.yaml
index 1b81d85..b93b1f4 100644
--- a/config/crd/patches/webhook_in_airflowclusters.yaml
+++ b/config/crd/patches/webhook_in_airflowclusters.yaml
@@ -1,5 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # The following patch enables conversion webhook for CRD
 # CRD conversion requires k8s 1.13 or later.
+---
 apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
diff --git a/config/default/kustomization.yaml b/config/default/kustomization.yaml
index f82fbf3..5b6cd10 100644
--- a/config/default/kustomization.yaml
+++ b/config/default/kustomization.yaml
@@ -1,4 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # Adds namespace to all resources.
+---
 namespace: airflow-on-k8s-operator-system
 
 # Value of this field is prepended to the
@@ -9,66 +25,66 @@
 namePrefix: airflow-on-k8s-operator-
 
 # Labels to add to all resources and selectors.
-#commonLabels:
+# commonLabels:
 #  someName: someValue
 
 bases:
-- ../crd
-- ../rbac
-- ../manager
+  - ../crd
+  - ../rbac
+  - ../manager
 # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in crd/kustomization.yaml
-#- ../webhook
+# - ../webhook
 # [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required.
-#- ../certmanager
-# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'. 
-#- ../prometheus
+# - ../certmanager
+# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'.
+# - ../prometheus
 
 patchesStrategicMerge:
   # Protect the /metrics endpoint by putting it behind auth.
   # Only one of manager_auth_proxy_patch.yaml and
   # manager_prometheus_metrics_patch.yaml should be enabled.
-- manager_auth_proxy_patch.yaml
+  - manager_auth_proxy_patch.yaml
   # If you want your controller-manager to expose the /metrics
   # endpoint w/o any authn/z, uncomment the following line and
   # comment manager_auth_proxy_patch.yaml.
   # Only one of manager_auth_proxy_patch.yaml and
   # manager_prometheus_metrics_patch.yaml should be enabled.
-#- manager_prometheus_metrics_patch.yaml
+# - manager_prometheus_metrics_patch.yaml
 
 # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in crd/kustomization.yaml
-#- manager_webhook_patch.yaml
+# - manager_webhook_patch.yaml
 
 # [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'.
 # Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks.
 # 'CERTMANAGER' needs to be enabled to use ca injection
-#- webhookcainjection_patch.yaml
+# - webhookcainjection_patch.yaml
 
 # the following config is for teaching kustomize how to do var substitution
 vars:
 # [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix.
-#- name: CERTIFICATE_NAMESPACE # namespace of the certificate CR
-#  objref:
-#    kind: Certificate
-#    group: cert-manager.io
-#    version: v1alpha2
-#    name: serving-cert # this name should match the one in certificate.yaml
-#  fieldref:
-#    fieldpath: metadata.namespace
-#- name: CERTIFICATE_NAME
-#  objref:
-#    kind: Certificate
-#    group: cert-manager.io
-#    version: v1alpha2
-#    name: serving-cert # this name should match the one in certificate.yaml
-#- name: SERVICE_NAMESPACE # namespace of the service
-#  objref:
-#    kind: Service
-#    version: v1
-#    name: webhook-service
-#  fieldref:
-#    fieldpath: metadata.namespace
-#- name: SERVICE_NAME
-#  objref:
-#    kind: Service
-#    version: v1
-#    name: webhook-service
+#  - name: CERTIFICATE_NAMESPACE # namespace of the certificate CR
+#    objref:
+#      kind: Certificate
+#      group: cert-manager.io
+#      version: v1alpha2
+#      name: serving-cert # this name should match the one in certificate.yaml
+#    fieldref:
+#      fieldpath: metadata.namespace
+#  - name: CERTIFICATE_NAME
+#    objref:
+#      kind: Certificate
+#      group: cert-manager.io
+#      version: v1alpha2
+#      name: serving-cert # this name should match the one in certificate.yaml
+#  - name: SERVICE_NAMESPACE # namespace of the service
+#    objref:
+#      kind: Service
+#      version: v1
+#      name: webhook-service
+#    fieldref:
+#      fieldpath: metadata.namespace
+#  - name: SERVICE_NAME
+#    objref:
+#      kind: Service
+#      version: v1
+#      name: webhook-service
diff --git a/config/default/manager_auth_proxy_patch.yaml b/config/default/manager_auth_proxy_patch.yaml
index 61cb5e7..197bcc0 100644
--- a/config/default/manager_auth_proxy_patch.yaml
+++ b/config/default/manager_auth_proxy_patch.yaml
@@ -1,5 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # This patch inject a sidecar container which is a HTTP proxy for the controller manager,
 # it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews.
+
+---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -9,17 +26,17 @@
   template:
     spec:
       containers:
-      - name: kube-rbac-proxy
-        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.4.1
-        args:
-        - "--secure-listen-address=0.0.0.0:8443"
-        - "--upstream=http://127.0.0.1:8080/"
-        - "--logtostderr=true"
-        - "--v=10"
-        ports:
-        - containerPort: 8443
-          name: https
-      - name: manager
-        args:
-        - "--metrics-addr=127.0.0.1:8080"
-        - "--enable-leader-election"
+        - name: kube-rbac-proxy
+          image: gcr.io/kubebuilder/kube-rbac-proxy:v0.4.1
+          args:
+            - "--secure-listen-address=0.0.0.0:8443"
+            - "--upstream=http://127.0.0.1:8080/"
+            - "--logtostderr=true"
+            - "--v=10"
+          ports:
+            - containerPort: 8443
+              name: https
+        - name: manager
+          args:
+            - "--metrics-addr=127.0.0.1:8080"
+            - "--enable-leader-election"
diff --git a/config/default/manager_webhook_patch.yaml b/config/default/manager_webhook_patch.yaml
index 738de35..476180c 100644
--- a/config/default/manager_webhook_patch.yaml
+++ b/config/default/manager_webhook_patch.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -7,17 +23,17 @@
   template:
     spec:
       containers:
-      - name: manager
-        ports:
-        - containerPort: 9443
-          name: webhook-server
-          protocol: TCP
-        volumeMounts:
-        - mountPath: /tmp/k8s-webhook-server/serving-certs
-          name: cert
-          readOnly: true
+        - name: manager
+          ports:
+            - containerPort: 9443
+              name: webhook-server
+              protocol: TCP
+          volumeMounts:
+            - mountPath: /tmp/k8s-webhook-server/serving-certs
+              name: cert
+              readOnly: true
       volumes:
-      - name: cert
-        secret:
-          defaultMode: 420
-          secretName: webhook-server-cert
+        - name: cert
+          secret:
+            defaultMode: 420
+            secretName: webhook-server-cert
diff --git a/config/default/webhookcainjection_patch.yaml b/config/default/webhookcainjection_patch.yaml
index 7e79bf9..18434c4 100644
--- a/config/default/webhookcainjection_patch.yaml
+++ b/config/default/webhookcainjection_patch.yaml
@@ -1,11 +1,29 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # This patch add annotation to admission webhook config and
 # the variables $(CERTIFICATE_NAMESPACE) and $(CERTIFICATE_NAME) will be substituted by kustomize.
+
+---
 apiVersion: admissionregistration.k8s.io/v1beta1
 kind: MutatingWebhookConfiguration
 metadata:
   name: mutating-webhook-configuration
   annotations:
     cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME)
+
 ---
 apiVersion: admissionregistration.k8s.io/v1beta1
 kind: ValidatingWebhookConfiguration
diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml
index 5c5f0b8..5d6ba4f 100644
--- a/config/manager/kustomization.yaml
+++ b/config/manager/kustomization.yaml
@@ -1,2 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 resources:
-- manager.yaml
+  - manager.yaml
diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml
index b6c85a5..2966d5c 100644
--- a/config/manager/manager.yaml
+++ b/config/manager/manager.yaml
@@ -1,9 +1,26 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: Namespace
 metadata:
   labels:
     control-plane: controller-manager
   name: system
+
 ---
 apiVersion: apps/v1
 kind: Deployment
@@ -23,17 +40,17 @@
         control-plane: controller-manager
     spec:
       containers:
-      - command:
-        - /manager
-        args:
-        - --enable-leader-election
-        image: controller:latest
-        name: manager
-        resources:
-          limits:
-            cpu: 100m
-            memory: 30Mi
-          requests:
-            cpu: 100m
-            memory: 20Mi
+        - command:
+            - /manager
+          args:
+            - --enable-leader-election
+          image: controller:latest
+          name: manager
+          resources:
+            limits:
+              cpu: 100m
+              memory: 30Mi
+            requests:
+              cpu: 100m
+              memory: 20Mi
       terminationGracePeriodSeconds: 10
diff --git a/config/prometheus/kustomization.yaml b/config/prometheus/kustomization.yaml
index ed13716..033fb50 100644
--- a/config/prometheus/kustomization.yaml
+++ b/config/prometheus/kustomization.yaml
@@ -1,2 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 resources:
-- monitor.yaml
+  - monitor.yaml
diff --git a/config/prometheus/monitor.yaml b/config/prometheus/monitor.yaml
index e2d9b08..5722c3e 100644
--- a/config/prometheus/monitor.yaml
+++ b/config/prometheus/monitor.yaml
@@ -1,5 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Prometheus Monitor Service (Metrics)
+---
 apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
 metadata:
diff --git a/config/rbac/airflowbase_editor_role.yaml b/config/rbac/airflowbase_editor_role.yaml
index 7ae48e4..71027d8 100644
--- a/config/rbac/airflowbase_editor_role.yaml
+++ b/config/rbac/airflowbase_editor_role.yaml
@@ -1,26 +1,42 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # permissions to do edit airflowbases.
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: airflowbase-editor-role
 rules:
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowbases
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowbases/status
-  verbs:
-  - get
-  - patch
-  - update
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowbases
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowbases/status
+    verbs:
+      - get
+      - patch
+      - update
diff --git a/config/rbac/airflowbase_viewer_role.yaml b/config/rbac/airflowbase_viewer_role.yaml
index d51d5a6..71b9a0b 100644
--- a/config/rbac/airflowbase_viewer_role.yaml
+++ b/config/rbac/airflowbase_viewer_role.yaml
@@ -1,20 +1,36 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # permissions to do viewer airflowbases.
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: airflowbase-viewer-role
 rules:
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowbases
-  verbs:
-  - get
-  - list
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowbases/status
-  verbs:
-  - get
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowbases
+    verbs:
+      - get
+      - list
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowbases/status
+    verbs:
+      - get
diff --git a/config/rbac/airflowcluster_editor_role.yaml b/config/rbac/airflowcluster_editor_role.yaml
index 8888d10..ebce88f 100644
--- a/config/rbac/airflowcluster_editor_role.yaml
+++ b/config/rbac/airflowcluster_editor_role.yaml
@@ -1,26 +1,42 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # permissions to do edit airflowclusters.
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: airflowcluster-editor-role
 rules:
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowclusters
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowclusters/status
-  verbs:
-  - get
-  - patch
-  - update
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowclusters
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowclusters/status
+    verbs:
+      - get
+      - patch
+      - update
diff --git a/config/rbac/airflowcluster_viewer_role.yaml b/config/rbac/airflowcluster_viewer_role.yaml
index 54502ec..e7c3109 100644
--- a/config/rbac/airflowcluster_viewer_role.yaml
+++ b/config/rbac/airflowcluster_viewer_role.yaml
@@ -1,20 +1,36 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # permissions to do viewer airflowclusters.
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: airflowcluster-viewer-role
 rules:
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowclusters
-  verbs:
-  - get
-  - list
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowclusters/status
-  verbs:
-  - get
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowclusters
+    verbs:
+      - get
+      - list
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowclusters/status
+    verbs:
+      - get
diff --git a/config/rbac/auth_proxy_role.yaml b/config/rbac/auth_proxy_role.yaml
index 618f5e4..c1ed314 100644
--- a/config/rbac/auth_proxy_role.yaml
+++ b/config/rbac/auth_proxy_role.yaml
@@ -1,13 +1,29 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: proxy-role
 rules:
-- apiGroups: ["authentication.k8s.io"]
-  resources:
-  - tokenreviews
-  verbs: ["create"]
-- apiGroups: ["authorization.k8s.io"]
-  resources:
-  - subjectaccessreviews
-  verbs: ["create"]
+  - apiGroups: ["authentication.k8s.io"]
+    resources:
+      - tokenreviews
+    verbs: ["create"]
+  - apiGroups: ["authorization.k8s.io"]
+    resources:
+      - subjectaccessreviews
+    verbs: ["create"]
diff --git a/config/rbac/auth_proxy_role_binding.yaml b/config/rbac/auth_proxy_role_binding.yaml
index 48ed1e4..3f15b42 100644
--- a/config/rbac/auth_proxy_role_binding.yaml
+++ b/config/rbac/auth_proxy_role_binding.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
@@ -7,6 +23,6 @@
   kind: ClusterRole
   name: proxy-role
 subjects:
-- kind: ServiceAccount
-  name: default
-  namespace: system
+  - kind: ServiceAccount
+    name: default
+    namespace: system
diff --git a/config/rbac/auth_proxy_service.yaml b/config/rbac/auth_proxy_service.yaml
index 6cf656b..e10d117 100644
--- a/config/rbac/auth_proxy_service.yaml
+++ b/config/rbac/auth_proxy_service.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: Service
 metadata:
@@ -7,8 +23,8 @@
   namespace: system
 spec:
   ports:
-  - name: https
-    port: 8443
-    targetPort: https
+    - name: https
+      port: 8443
+      targetPort: https
   selector:
     control-plane: controller-manager
diff --git a/config/rbac/kustomization.yaml b/config/rbac/kustomization.yaml
index 817f1fe..c34e986 100644
--- a/config/rbac/kustomization.yaml
+++ b/config/rbac/kustomization.yaml
@@ -1,11 +1,27 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 resources:
-- role.yaml
-- role_binding.yaml
-- leader_election_role.yaml
-- leader_election_role_binding.yaml
-# Comment the following 3 lines if you want to disable
-# the auth proxy (https://github.com/brancz/kube-rbac-proxy)
-# which protects your /metrics endpoint.
-- auth_proxy_service.yaml
-- auth_proxy_role.yaml
-- auth_proxy_role_binding.yaml
+  - role.yaml
+  - role_binding.yaml
+  - leader_election_role.yaml
+  - leader_election_role_binding.yaml
+  # Comment the following 3 lines if you want to disable
+  # the auth proxy (https://github.com/brancz/kube-rbac-proxy)
+  # which protects your /metrics endpoint.
+  - auth_proxy_service.yaml
+  - auth_proxy_role.yaml
+  - auth_proxy_role_binding.yaml
diff --git a/config/rbac/leader_election_role.yaml b/config/rbac/leader_election_role.yaml
index eaa7915..2d1f23c 100644
--- a/config/rbac/leader_election_role.yaml
+++ b/config/rbac/leader_election_role.yaml
@@ -1,32 +1,48 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # permissions to do leader election.
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: Role
 metadata:
   name: leader-election-role
 rules:
-- apiGroups:
-  - ""
-  resources:
-  - configmaps
-  verbs:
-  - get
-  - list
-  - watch
-  - create
-  - update
-  - patch
-  - delete
-- apiGroups:
-  - ""
-  resources:
-  - configmaps/status
-  verbs:
-  - get
-  - update
-  - patch
-- apiGroups:
-  - ""
-  resources:
-  - events
-  verbs:
-  - create
+  - apiGroups:
+      - ""
+    resources:
+      - configmaps
+    verbs:
+      - get
+      - list
+      - watch
+      - create
+      - update
+      - patch
+      - delete
+  - apiGroups:
+      - ""
+    resources:
+      - configmaps/status
+    verbs:
+      - get
+      - update
+      - patch
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
diff --git a/config/rbac/leader_election_role_binding.yaml b/config/rbac/leader_election_role_binding.yaml
index eed1690..0a5cd23 100644
--- a/config/rbac/leader_election_role_binding.yaml
+++ b/config/rbac/leader_election_role_binding.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
 metadata:
@@ -7,6 +23,6 @@
   kind: Role
   name: leader-election-role
 subjects:
-- kind: ServiceAccount
-  name: default
-  namespace: system
+  - kind: ServiceAccount
+    name: default
+    namespace: system
diff --git a/config/rbac/role.yaml b/config/rbac/role.yaml
index 7c2331d..2f05014 100644
--- a/config/rbac/role.yaml
+++ b/config/rbac/role.yaml
@@ -1,3 +1,17 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 ---
 apiVersion: rbac.authorization.k8s.io/v1
@@ -6,143 +20,143 @@
   creationTimestamp: null
   name: manager-role
 rules:
-- resources:
-  - configmaps
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- resources:
-  - secrets
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- resources:
-  - serviceaccounts
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- resources:
-  - services
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowbases
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowbases/status
-  verbs:
-  - get
-  - patch
-  - update
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowclusters
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - airflow.apache.org
-  resources:
-  - airflowclusters/status
-  verbs:
-  - get
-  - patch
-  - update
-- apiGroups:
-  - app.k8s.io
-  resources:
-  - applications
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - apps
-  resources:
-  - statefulsets
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - policy
-  resources:
-  - poddisruptionbudgets
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - rbac.authorization.k8s.io
-  resources:
-  - rolebindings
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
-- apiGroups:
-  - storage.k8s.io
-  resources:
-  - storageclasses
-  verbs:
-  - create
-  - delete
-  - get
-  - list
-  - patch
-  - update
-  - watch
+  - resources:
+      - configmaps
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - resources:
+      - secrets
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - resources:
+      - serviceaccounts
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - resources:
+      - services
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowbases
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowbases/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowclusters
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - airflow.apache.org
+    resources:
+      - airflowclusters/status
+    verbs:
+      - get
+      - patch
+      - update
+  - apiGroups:
+      - app.k8s.io
+    resources:
+      - applications
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - apps
+    resources:
+      - statefulsets
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - policy
+    resources:
+      - poddisruptionbudgets
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - rbac.authorization.k8s.io
+    resources:
+      - rolebindings
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
+  - apiGroups:
+      - storage.k8s.io
+    resources:
+      - storageclasses
+    verbs:
+      - create
+      - delete
+      - get
+      - list
+      - patch
+      - update
+      - watch
diff --git a/config/rbac/role_binding.yaml b/config/rbac/role_binding.yaml
index 8f26587..8eb0167 100644
--- a/config/rbac/role_binding.yaml
+++ b/config/rbac/role_binding.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
@@ -7,6 +23,6 @@
   kind: ClusterRole
   name: manager-role
 subjects:
-- kind: ServiceAccount
-  name: default
-  namespace: system
+  - kind: ServiceAccount
+    name: default
+    namespace: system
diff --git a/config/samples/airflow_v1alpha1_airflowbase.yaml b/config/samples/airflow_v1alpha1_airflowbase.yaml
index d415f9a..417d8e6 100644
--- a/config/samples/airflow_v1alpha1_airflowbase.yaml
+++ b/config/samples/airflow_v1alpha1_airflowbase.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowBase
 metadata:
diff --git a/config/samples/airflow_v1alpha1_airflowcluster.yaml b/config/samples/airflow_v1alpha1_airflowcluster.yaml
index 415de17..1be98f1 100644
--- a/config/samples/airflow_v1alpha1_airflowcluster.yaml
+++ b/config/samples/airflow_v1alpha1_airflowcluster.yaml
@@ -1,3 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
diff --git a/config/webhook/kustomization.yaml b/config/webhook/kustomization.yaml
index 9cf2613..df4f43c 100644
--- a/config/webhook/kustomization.yaml
+++ b/config/webhook/kustomization.yaml
@@ -1,6 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 resources:
-- manifests.yaml
-- service.yaml
+  - manifests.yaml
+  - service.yaml
 
 configurations:
-- kustomizeconfig.yaml
+  - kustomizeconfig.yaml
diff --git a/config/webhook/kustomizeconfig.yaml b/config/webhook/kustomizeconfig.yaml
index 25e21e3..43bc804 100644
--- a/config/webhook/kustomizeconfig.yaml
+++ b/config/webhook/kustomizeconfig.yaml
@@ -1,25 +1,41 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # the following config is for teaching kustomize where to look at when substituting vars.
 # It requires kustomize v2.1.0 or newer to work properly.
+---
 nameReference:
-- kind: Service
-  version: v1
-  fieldSpecs:
-  - kind: MutatingWebhookConfiguration
-    group: admissionregistration.k8s.io
-    path: webhooks/clientConfig/service/name
-  - kind: ValidatingWebhookConfiguration
-    group: admissionregistration.k8s.io
-    path: webhooks/clientConfig/service/name
+  - kind: Service
+    version: v1
+    fieldSpecs:
+      - kind: MutatingWebhookConfiguration
+        group: admissionregistration.k8s.io
+        path: webhooks/clientConfig/service/name
+      - kind: ValidatingWebhookConfiguration
+        group: admissionregistration.k8s.io
+        path: webhooks/clientConfig/service/name
 
 namespace:
-- kind: MutatingWebhookConfiguration
-  group: admissionregistration.k8s.io
-  path: webhooks/clientConfig/service/namespace
-  create: true
-- kind: ValidatingWebhookConfiguration
-  group: admissionregistration.k8s.io
-  path: webhooks/clientConfig/service/namespace
-  create: true
+  - kind: MutatingWebhookConfiguration
+    group: admissionregistration.k8s.io
+    path: webhooks/clientConfig/service/namespace
+    create: true
+  - kind: ValidatingWebhookConfiguration
+    group: admissionregistration.k8s.io
+    path: webhooks/clientConfig/service/namespace
+    create: true
 
 varReference:
-- path: metadata/annotations
+  - path: metadata/annotations
diff --git a/config/webhook/manifests.yaml b/config/webhook/manifests.yaml
index e69de29..ec20143 100644
--- a/config/webhook/manifests.yaml
+++ b/config/webhook/manifests.yaml
@@ -0,0 +1,14 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/config/webhook/service.yaml b/config/webhook/service.yaml
index 31e0f82..0ab0717 100644
--- a/config/webhook/service.yaml
+++ b/config/webhook/service.yaml
@@ -1,4 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: v1
 kind: Service
 metadata:
diff --git a/docs/api.md b/docs/api.md
index 172b327..339a6bf 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -1,14 +1,31 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
 # Airflow Operator Custom Resource (API)
 The Airflow Operator uses these [CustomResourceDefinitions](https://kubernetes.io/docs/concepts/api-n/custom-resources/):
 
-`AirflowBase` includes MySQL, UI, NFS(DagStore).  
-`AirflowCluster` includes Airflow Scheduler, Workers, Redis.  
+`AirflowBase` includes MySQL, UI, NFS(DagStore).
+`AirflowCluster` includes Airflow Scheduler, Workers, Redis.
 
 Multiple `AirflowCluster` could use the same `AirflowBase`. The way custom resources are defined allows multi-single-tenant (multiple single users) usecases, where users use different airflow plugins (opeartors, packages etc) in their set
 up. This improves cluster utilization and provide multiple users (in same trust domain) with some isolation.
 
 ## AirflowBase API
- 
+
 | **Field** | **json field**| **Type** | **Info** |
 | --- | --- | --- | --- |
 | Spec | `spec` | [AirflowBaseSpec](#AirflowBaseSpec) | The specfication for Airflow Base cusotm resource |
@@ -41,14 +58,14 @@
 | Options | map[string]string | ` ` | command line options for mysql |
 
 
-#### MySQLBackup 
+#### MySQLBackup
 | **Field** | **Type** | **json field** | **Info** |
 | --- | --- | --- | --- |
 | Schedule | string | `schedule` | Schedule is the cron string used to schedule backup|
 | Storage | StorageSpec | `storage` | Storage has the s3 compatible storage spec|
 
 
-##### StorageSpec 
+##### StorageSpec
 | **Field** | **Type** | **json field** | **Info** |
 | --- | --- | --- | --- |
 | StorageProvider | string | `storageprovider` | Provider is the storage type used for backup and restore e.g. s3, oci-s3-compat, aws-s3, gce-s3, etc |
@@ -215,7 +232,7 @@
 | LastError | string | `lasterror` | LastError|
 | Status | string | `status` | Status|
 
-#### StsStatus 
+#### StsStatus
 | **Field** | **Type** | **json field** | **Info** |
 | --- | --- | --- | --- |
 | Link | string | `link` | Link to sts|
diff --git a/docs/design.md b/docs/design.md
index 42ed36f..63af63a 100644
--- a/docs/design.md
+++ b/docs/design.md
@@ -1,3 +1,20 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
 # Introduction
 
 ### Airflow
@@ -6,16 +23,16 @@
 ![Airflow Multi Node](airflow-multi-node.png)
 
 ### Kubernetes (k8s)
-Kubernetes(k8s) is a distributed workload orchestration system similar to Borg or Mesos. K8s can orchestrate containerized workloads on bare metal or on VMs and provides primitives modelled in a declarative way to manage the compute, memory, storage, networking, isolation, and life cycle. K8s can be accessed via kubectl(cli) or the APIs that consume the declarative specs. In the backend, the intent in the declarative specs are fulfilled by k8s core controllers that take actions (like create containers, network service, mount volume etc). k8s provides building blocks for stateless (Pods, Deployment) and stateful applications (statefulset) deployment. K8s controllers for these building blocks monitor the deployed instances to ensure cardinality, host to volume mapping across recreates, recovery on failures etc. 
+Kubernetes(k8s) is a distributed workload orchestration system similar to Borg or Mesos. K8s can orchestrate containerized workloads on bare metal or on VMs and provides primitives modelled in a declarative way to manage the compute, memory, storage, networking, isolation, and life cycle. K8s can be accessed via kubectl(cli) or the APIs that consume the declarative specs. In the backend, the intent in the declarative specs are fulfilled by k8s core controllers that take actions (like create containers, network service, mount volume etc). k8s provides building blocks for stateless (Pods, Deployment) and stateful applications (statefulset) deployment. K8s controllers for these building blocks monitor the deployed instances to ensure cardinality, host to volume mapping across recreates, recovery on failures etc.
 
 ### What is an Operator in Kubernetes
-In case of some stateful applications, the declarative models provided by kubernetes are not sufficient to handle fault remediation, scaling with data integrity and availability. This is where an K8s Operator pattern excels. An operator encapsulates an application's operational domain knowledge and enable common day-N operations. An operator is an application-specific controller that extends the Kubernetes API to create, configure and manage stateful applications. An operator API is implemented by extending the existing k8s API with Custom Resources Definitions(CRDs) that declaratively describes the intent. Custom Resources are serializable as json and are stored in the API Server. The controller can watch these Custom Resources and take actions to move the system to the desired state. This enables meaningful extension of the k8s platform and make it suitable for complex stateful applications. 
+In case of some stateful applications, the declarative models provided by kubernetes are not sufficient to handle fault remediation, scaling with data integrity and availability. This is where an K8s Operator pattern excels. An operator encapsulates an application's operational domain knowledge and enable common day-N operations. An operator is an application-specific controller that extends the Kubernetes API to create, configure and manage stateful applications. An operator API is implemented by extending the existing k8s API with Custom Resources Definitions(CRDs) that declaratively describes the intent. Custom Resources are serializable as json and are stored in the API Server. The controller can watch these Custom Resources and take actions to move the system to the desired state. This enables meaningful extension of the k8s platform and make it suitable for complex stateful applications.
 
 `K8s Operator = K8s API +  CRD(declarative spec) + Custom Controller`
 
-The goal is to ensure that Kubernetes works well as a substrate for deploying Airflow. 
+The goal is to ensure that Kubernetes works well as a substrate for deploying Airflow.
 # Airflow Operator Custom Resource (API)
-The Airflow operator API is implemented by extending the k8s API with Custom Resources Definitions (CRDs) that declaratively describes the intent. Custom resources are serializable as json and are stored in the API Server. The Airflow controller watches these Custom Resources and take actions to move the Airflow cluster to the desired state. All CRDs inherit the contents of ObjectMeta and TypeMeta that are common to k8s resources. 
+The Airflow operator API is implemented by extending the k8s API with Custom Resources Definitions (CRDs) that declaratively describes the intent. Custom resources are serializable as json and are stored in the API Server. The Airflow controller watches these Custom Resources and take actions to move the Airflow cluster to the desired state. All CRDs inherit the contents of ObjectMeta and TypeMeta that are common to k8s resources.
 To improve cluster utilization and provide multiple users (in same trust domain) with some isolation, we are splitting the Airflow components into `AirflowBase` (common) and `AirflowCluster` (per user). `AirflowBase` includes MySQL, UI, NFS(DagStore). `AirflowCluster` includes Airflow Scheduler, Workers, Redis. This allows use cases where different users use different airflow plugins (opeartors, packages etc) in their setup.
 
 The [API Design](https://github.com/apache/airflow-on-k8s-operator/blob/master/docs/api.md) details the `AirflowBase` and `AirflowCluster` Custom Resource fields.
@@ -31,23 +48,23 @@
 If MySQLSpec is specified and .operator is False a simple statefulset with a single instance of MySQL is deployed. This is not recommended for production deployments. For production cases, use CloudSQL connected using SQLProxy.
 
 TODO
-If .operator is True, a MySQLCluster and MySQLBackupSchedule CRs are created to deploy a MySQL cluster. MySQL Operator needs to be installed for handling the Custom Resources. 
+If .operator is True, a MySQLCluster and MySQLBackupSchedule CRs are created to deploy a MySQL cluster. MySQL Operator needs to be installed for handling the Custom Resources.
 
 #### StatefulSet
-MySQL, SQLProxy, NFS cluster are all deployed as stateful sets. StatefulSet creates the desired number of pods and ensures pod-hostname to volume mapping. This is useful when a pod dies and a new pod takes its place. The network identity of the new pod is set to that of the pod being replaced. Similarly the volume mounted on the old pod is moved to the new pod. 
+MySQL, SQLProxy, NFS cluster are all deployed as stateful sets. StatefulSet creates the desired number of pods and ensures pod-hostname to volume mapping. This is useful when a pod dies and a new pod takes its place. The network identity of the new pod is set to that of the pod being replaced. Similarly the volume mounted on the old pod is moved to the new pod.
 
 #### EndPoint (Service)
 The AirflowUI and NFS cluster are exposed via a service for use by the users and AirflowClusters.
 
 #### Persistent Volumes and claims
-NFS cluster and MySQL use PVCs for data durability in the face of temporary compute degradation. Persistent Volume(PV) matching the Persistent Volume Claim(PVC)  is used when pods are created. If a matching PV is not found, dynamic provisioning is used to provision a PV and attached to the PVC created by the StatefulSets. For an elastic scalable service, dynamic provisioning is prefered. 
+NFS cluster and MySQL use PVCs for data durability in the face of temporary compute degradation. Persistent Volume(PV) matching the Persistent Volume Claim(PVC)  is used when pods are created. If a matching PV is not found, dynamic provisioning is used to provision a PV and attached to the PVC created by the StatefulSets. For an elastic scalable service, dynamic provisioning is prefered.
 
 #### Pods
-StatefulSet creates Pods. For NFS and MySQL, Persistent Volumes are attached to the Pod based on the PVC in the StatefulSet spec.  The AirflowUI and SQL-Proxy pods are simple single purpose pods and do not typically need data persistence. In case of MySQL controller, the details of MySQL pods can be found here. 
+StatefulSet creates Pods. For NFS and MySQL, Persistent Volumes are attached to the Pod based on the PVC in the StatefulSet spec.  The AirflowUI and SQL-Proxy pods are simple single purpose pods and do not typically need data persistence. In case of MySQL controller, the details of MySQL pods can be found here.
 
 ## AirflowCluster Controller
 
-AirflowCluster Controller watches for AirflowCluster CR and fulfils the intent. The intent translates to creation, updation or deletion of Statefulsets, PVCs for Airflow UI, Scheduler, Workers and Redis. This Custom Resource allows users to spin-up their own Airflow clusters for providing DAG level isolation between users. This enables multi-user (same trust domain, tenant) Airflow deployment. It also allows users to iterate faster with one-time use schedulers. Isolation in SQL is achieved by creating separate database for each cluster. The controller also handles updates to CRs. 
+AirflowCluster Controller watches for AirflowCluster CR and fulfils the intent. The intent translates to creation, updation or deletion of Statefulsets, PVCs for Airflow UI, Scheduler, Workers and Redis. This Custom Resource allows users to spin-up their own Airflow clusters for providing DAG level isolation between users. This enables multi-user (same trust domain, tenant) Airflow deployment. It also allows users to iterate faster with one-time use schedulers. Isolation in SQL is achieved by creating separate database for each cluster. The controller also handles updates to CRs.
 
 TODO
 It could drain celery workers nodes and k8s executor pods to prepare for upgrade.
@@ -56,14 +73,14 @@
 ![Airflow Cluster](airflow-cluster.png)
 
 #### Redis
-RedisSpec is required if .Spec.executor is celery. 
+RedisSpec is required if .Spec.executor is celery.
 If .operator is False a simple statefulset with a single instance of Redis is deployed. Since redis is used as a non persistent cache, either can be used for production.
 
 TODO
-If .operator is True, a  RedisReplicas custom resource is created to deploy Redis. Redis Operator needs to be installed for handling the Custom Resources. 
+If .operator is True, a  RedisReplicas custom resource is created to deploy Redis. Redis Operator needs to be installed for handling the Custom Resources.
 
 #### StatefulSet
-Airflow Scheduler and workers are deployed as stateful sets. StatefulSet creates the desired number of pods and ensures pod-name to volume mapping. The network identity of the new pod is set to that of the pod being replaced. Similarly the volume mounted on the old pod is moved to the new pod. 
+Airflow Scheduler and workers are deployed as stateful sets. StatefulSet creates the desired number of pods and ensures pod-name to volume mapping. The network identity of the new pod is set to that of the pod being replaced. Similarly the volume mounted on the old pod is moved to the new pod.
 
 #### EndPoint (service)
 Since none of the services are exposed outside, Service definition is not needed. If in future we support clustered redis, we may use Service to front that cluster.
@@ -72,7 +89,7 @@
 Airflow scheduler and workers could use PVCs for mounting data volumes that contain the DAGs. The PVCs need to be [RWX(read write many) or ROX(read only many)](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes).
 
 ### Airflow Pods
-Airflow Pods have the airflow container (scheduler,worker) and DAG Sidecar container. The DAG sidecar gets DAGs from the configured DAG source. In case of PVC as DAG source, the backing PV needs to be  mounted as RWX (RW many) or ROX (RO many). 
+Airflow Pods have the airflow container (scheduler,worker) and DAG Sidecar container. The DAG sidecar gets DAGs from the configured DAG source. In case of PVC as DAG source, the backing PV needs to be  mounted as RWX (RW many) or ROX (RO many).
 
 ![Airflow Pods](airflow-pod.png)
 
@@ -107,20 +124,20 @@
 Deployed Airflow components do not require the operator control plane for normal operation. However if the cluster health degrades due to a failure, control plane is needed to recover and restore it to full health. Operator control plane health is monitored by kubernetes and recovered. Once recovered the operator would resync with the Airflow CRs and heal them if needed.
 
 ## Storage
-Single instance storage failures would manifest and degraded Pod health and would be rescheduled. But since the PVC association is binding, rescheduled pods may face the same issue. 
+Single instance storage failures would manifest and degraded Pod health and would be rescheduled. But since the PVC association is binding, rescheduled pods may face the same issue.
 
 TODO: on PV failure, detach PV from PVC and get a new PV ?
 
 # Security
 ## Authn
-The k8s API server uses authentication tokens in order to authorize requests. This model is a standard and is integrated with the IAM providers on most public clouds. MySQL operator managed MySQL instances are protected by a password that is either user provided in a Secret or auto generated and saved in a Secret. K8s IAM and RBAC protects this Secret. Similarly Redis operator managed Redis cluster provides data protection. 
+The k8s API server uses authentication tokens in order to authorize requests. This model is a standard and is integrated with the IAM providers on most public clouds. MySQL operator managed MySQL instances are protected by a password that is either user provided in a Secret or auto generated and saved in a Secret. K8s IAM and RBAC protects this Secret. Similarly Redis operator managed Redis cluster provides data protection.
 TODO: Security for airflow components and NFS DAGs
 
 ## Authz
 The Kubernetes API server provides for configurable RBAC (Role Based Access Control). The Airflow operator operates with a particular service account that would need appropriate RBAC to create and modify StatefulSet, Service, ConfigMap, Secrets and Pods. Same applies to MySQL operator and Redis operators if used.
 
 ## Data in Flight
-MySQL supports encrypted connections. Clients should use ssl to connect to MySQL server. Similarly Redis offers secure connection to clients. Airflow UI enables SSL for secure HTTP access. 
+MySQL supports encrypted connections. Clients should use ssl to connect to MySQL server. Similarly Redis offers secure connection to clients. Airflow UI enables SSL for secure HTTP access.
 TODO: Confirm Airflow uses secured connections to MySQL and Redis
 
 ## Data at Rest
diff --git a/docs/development.md b/docs/development.md
index b04fd2b..02b43cc 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -1,3 +1,20 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
 # Development
 You should have kubeconfig setup to point to your cluster.
 In case you want to build the Airflow Operator from the source code, e.g., to test a fix or a feature you write, you can do so following the instructions below.
@@ -17,7 +34,7 @@
 # run locally
 make run
 ```
-## Building docker image 
+## Building docker image
 #### GCP
 When working with GCP ensure that gcloud is setup and gcr(container registry) is enabled for the current project.
 If not set IMG env to point to the desired registry image.
@@ -45,6 +62,19 @@
 make deploy
 ```
 
+## Static checks
+This project uses the [pre-commit](https://pre-commit.com) framework.
+The pre-commit hooks use  several external linters that need to be installed
+before pre-commit is run. Each of the checks installs its own environment,
+so you do not need to install  those.
+
+### Enabling Pre-commit Hooks
+
+To turn on pre-commit checks for ``commit`` operations in git, enter:
+
+```sh
+pre-commit install
+```
 
 ## Tests
 
diff --git a/docs/quickstart.md b/docs/quickstart.md
index fe29ef3..0c3d6dc 100644
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -1,3 +1,20 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
 # Quick Start
 
 ## Deploy from GCP Marketplace
@@ -10,7 +27,7 @@
 Ensure kubeconfig points to your cluster.
 Due to a [known issue](https://cloud.google.com/kubernetes-engine/docs/how-to/role-based-access-control#defining_permissions_in_a_role) in GKE, you will need to first grant yourself cluster-admin privileges before you can create custom roles and role bindings on a GKE cluster versioned 1.6 and up.
 ```bash
-# grant admin 
+# grant admin
 $ kubectl create clusterrolebinding cluster-admin-binding --clusterrole cluster-admin --user your-account-email
 ```
 
@@ -27,7 +44,7 @@
 ```bash
 # First we need to build the docker image for the controller
 # Set this to the name of the docker registry and image you want to use
-$ export IMG=gcr.io/myproject/airflow-controller:latest 
+$ export IMG=gcr.io/myproject/airflow-controller:latest
 
 # Build and push
 $ make docker-push
@@ -57,7 +74,7 @@
 ```bash
 # deploy base components first
 $ kubectl apply -f hack/sample/mysql-celery/base.yaml
-# after 30-60s deploy cluster components 
+# after 30-60s deploy cluster components
 # using celery + git as DAG source
 $ kubectl apply -f hack/sample/mysql-celery/cluster.yaml
 # port forward to access the UI
@@ -65,14 +82,14 @@
 # port forward to access the Flower
 $ kubectl port-forward mc-cluster-flower-0 5555:5555
 # get status of the CRs
-$ kubectl get airflowbase/mc-base -o yaml 
-$ kubectl get airflowcluster/mc-cluster -o yaml 
+$ kubectl get airflowbase/mc-base -o yaml
+$ kubectl get airflowcluster/mc-cluster -o yaml
 
 # Against the same mc-base, we could deploy another cluster.
 # celery + gcs as DAG source (you need to update to point to your gcs bucket)
 $ kubectl apply -f hack/sample/mysql-celery-gcs/cluster.yaml
 $ kubectl port-forward mcg-cluster-airflowui-0 8081:8080
-$ kubectl get airflowcluster/mcg-cluster -o yaml 
+$ kubectl get airflowcluster/mcg-cluster -o yaml
 ```
 
 #### Deploy Postgres based samples
@@ -114,8 +131,8 @@
 # port forward to access the UI (port 8082)
 $ kubectl port-forward cc-cluster-airflowui-0 8082:8080
 # get status of the CRs
-$ kubectl get airflowbase/cc-base -o yaml 
-$ kubectl get airflowcluster/cc-cluster -o yaml 
+$ kubectl get airflowbase/cc-base -o yaml
+$ kubectl get airflowcluster/cc-cluster -o yaml
 ```
 
 ## Next steps
diff --git a/docs/userguide.md b/docs/userguide.md
index f745015..72c4a44 100644
--- a/docs/userguide.md
+++ b/docs/userguide.md
@@ -1,3 +1,20 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
 # User Guide
 
 TODO
@@ -33,5 +50,3 @@
       repo: "https://github.com/apache/incubator-airflow/"
       once: false
 ```
-
-
diff --git a/hack/appcrd.yaml b/hack/appcrd.yaml
index da1e5bf..0e7270c 100644
--- a/hack/appcrd.yaml
+++ b/hack/appcrd.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
diff --git a/hack/boilerplate.go.txt b/hack/boilerplate.go.txt
index b41c928..e69de29 100644
--- a/hack/boilerplate.go.txt
+++ b/hack/boilerplate.go.txt
@@ -1,15 +0,0 @@
-// Licensed to the Apache Software Foundation (ASF) under one or more
-// contributor license agreements.  See the NOTICE file distributed with
-// this work for additional information regarding copyright ownership.
-// The ASF licenses this file to You under the Apache License, Version 2.0
-// (the "License"); you may not use this file except in compliance with
-// the License.  You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
diff --git a/hack/sample/cloudsql-celery/base.yaml b/hack/sample/cloudsql-celery/base.yaml
index 45ff630..a41b7db 100644
--- a/hack/sample/cloudsql-celery/base.yaml
+++ b/hack/sample/cloudsql-celery/base.yaml
@@ -1,28 +1,28 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowBase
 metadata:
   name: cc-base
 spec:
   sqlproxy:
-          project: kubeflow-193622
-          region: us-central1
-          instance: airflow-test1
-          type: postgres
+    project: kubeflow-193622
+    region: us-central1
+    instance: airflow-test1
+    type: postgres
   storage:
     version: ""
diff --git a/hack/sample/cloudsql-celery/cluster.yaml b/hack/sample/cloudsql-celery/cluster.yaml
index fcba099..866613d 100644
--- a/hack/sample/cloudsql-celery/cluster.yaml
+++ b/hack/sample/cloudsql-celery/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -22,7 +21,7 @@
 spec:
   executor: Celery
   redis:
-    operator: False
+    operator: false
   scheduler:
     version: "1.10.2"
   ui:
diff --git a/hack/sample/cloudsql-celery/sqlproxy-secret.yaml b/hack/sample/cloudsql-celery/sqlproxy-secret.yaml
index c4b2a38..6f80eb9 100644
--- a/hack/sample/cloudsql-celery/sqlproxy-secret.yaml
+++ b/hack/sample/cloudsql-celery/sqlproxy-secret.yaml
@@ -1,24 +1,23 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: v1
 kind: Secret
 metadata:
   name: cc-base-sql
 type: Opaque
 data:
-  rootpassword: cm9vdDEyMw== 
+  rootpassword: cm9vdDEyMw==
diff --git a/hack/sample/cloudsql-k8s/cluster.yaml b/hack/sample/cloudsql-k8s/cluster.yaml
index 0c92082..00f049a 100644
--- a/hack/sample/cloudsql-k8s/cluster.yaml
+++ b/hack/sample/cloudsql-k8s/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
diff --git a/hack/sample/cloudsql-local/cluster.yaml b/hack/sample/cloudsql-local/cluster.yaml
index 857936f..fd4c28b 100644
--- a/hack/sample/cloudsql-local/cluster.yaml
+++ b/hack/sample/cloudsql-local/cluster.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
diff --git a/hack/sample/mysql-celery-gcs/cluster.yaml b/hack/sample/mysql-celery-gcs/cluster.yaml
index fb663b9..828e2bd 100644
--- a/hack/sample/mysql-celery-gcs/cluster.yaml
+++ b/hack/sample/mysql-celery-gcs/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -22,7 +21,7 @@
 spec:
   executor: Celery
   redis:
-    operator: False
+    operator: false
   scheduler:
     version: "1.10.2"
   ui:
diff --git a/hack/sample/mysql-celery/base.yaml b/hack/sample/mysql-celery/base.yaml
index 5720709..025d5da 100644
--- a/hack/sample/mysql-celery/base.yaml
+++ b/hack/sample/mysql-celery/base.yaml
@@ -1,26 +1,25 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowBase
 metadata:
   name: mc-base
 spec:
   mysql:
-    operator: False
+    operator: false
   storage:
     version: ""
diff --git a/hack/sample/mysql-celery/cluster.yaml b/hack/sample/mysql-celery/cluster.yaml
index f6c9d62..1635f07 100644
--- a/hack/sample/mysql-celery/cluster.yaml
+++ b/hack/sample/mysql-celery/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -25,7 +24,7 @@
     airflow:
       AIRFLOW_SOME_CONFIG: SomeValue
   redis:
-    operator: False
+    operator: false
   scheduler:
     version: "1.10.2"
   ui:
diff --git a/hack/sample/mysql-k8s/cluster.yaml b/hack/sample/mysql-k8s/cluster.yaml
index 6cb858c..02acdef 100644
--- a/hack/sample/mysql-k8s/cluster.yaml
+++ b/hack/sample/mysql-k8s/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -27,8 +26,8 @@
   scheduler:
     version: "1.10.2"
   worker:
-    #image: "gcr.io/airflow-development-225219/airflow"
-    #version: "demo-nr4"
+    # image: "gcr.io/airflow-development-225219/airflow"
+    # version: "demo-nr4"
     version: "1.10.2"
   dags:
     subdir: "airflow/example_dags/"
diff --git a/hack/sample/mysql-local/cluster.yaml b/hack/sample/mysql-local/cluster.yaml
index 78edd1f..a47af75 100644
--- a/hack/sample/mysql-local/cluster.yaml
+++ b/hack/sample/mysql-local/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -29,7 +28,7 @@
   airflowbase:
     name: mc-base
     #  config:
-    #airflow:
+    # airflow:
     #  AIRFLOW__SCHEDULER__DAG_DIR_LIST_INTERVAL: "100"
     #  AIRFLOW__WEBSERVER__AUTHENTICATE: "True"
     #  AIRFLOW__WEBSERVER__AUTH_BACKEND: "airflow.contrib.auth.backends.password_auth"
diff --git a/hack/sample/postgres-celery-memorystore/cluster.yaml b/hack/sample/postgres-celery-memorystore/cluster.yaml
index f6b15e7..e3558a8 100644
--- a/hack/sample/postgres-celery-memorystore/cluster.yaml
+++ b/hack/sample/postgres-celery-memorystore/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
diff --git a/hack/sample/postgres-celery-redis/cluster.yaml b/hack/sample/postgres-celery-redis/cluster.yaml
index 09a8b01..743f67b 100644
--- a/hack/sample/postgres-celery-redis/cluster.yaml
+++ b/hack/sample/postgres-celery-redis/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -22,9 +21,9 @@
 spec:
   executor: Celery
   redis:
-    operator: False
+    operator: false
     redisHost: "redis"
-    redisPassword: True
+    redisPassword: true
   scheduler:
     version: "1.10.2"
   ui:
diff --git a/hack/sample/postgres-celery-redis/redis-secret.yaml b/hack/sample/postgres-celery-redis/redis-secret.yaml
index e891e1c..7535e4c 100644
--- a/hack/sample/postgres-celery-redis/redis-secret.yaml
+++ b/hack/sample/postgres-celery-redis/redis-secret.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: v1
 kind: Secret
 metadata:
diff --git a/hack/sample/postgres-celery-redis/redis.yaml b/hack/sample/postgres-celery-redis/redis.yaml
index dc6b712..e9cafa6 100644
--- a/hack/sample/postgres-celery-redis/redis.yaml
+++ b/hack/sample/postgres-celery-redis/redis.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: v1
 kind: Service
 metadata:
@@ -46,14 +45,14 @@
           image: redis:4.0
           imagePullPolicy: Always
           args:
-          - --requirepass
-          - $(REDIS_PASSWORD)
+            - --requirepass
+            - $(REDIS_PASSWORD)
           env:
-          - name: REDIS_PASSWORD
-            valueFrom:
-              secretKeyRef:
-                key: password
-                name: pc-cluster-redis
+            - name: REDIS_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  key: password
+                  name: pc-cluster-redis
           ports:
             - containerPort: 6379
               name: redis
diff --git a/hack/sample/postgres-celery/base.yaml b/hack/sample/postgres-celery/base.yaml
index 49412b7..693daa9 100644
--- a/hack/sample/postgres-celery/base.yaml
+++ b/hack/sample/postgres-celery/base.yaml
@@ -1,26 +1,25 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowBase
 metadata:
   name: pc-base
 spec:
   postgres:
-    operator: False
+    operator: false
   storage:
     version: ""
diff --git a/hack/sample/postgres-celery/cluster.yaml b/hack/sample/postgres-celery/cluster.yaml
index b42e1fc..2218586 100644
--- a/hack/sample/postgres-celery/cluster.yaml
+++ b/hack/sample/postgres-celery/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
@@ -22,7 +21,7 @@
 spec:
   executor: Celery
   redis:
-    operator: False
+    operator: false
   scheduler:
     version: "1.10.2"
   ui:
diff --git a/hack/sample/postgres-k8s/cluster.yaml b/hack/sample/postgres-k8s/cluster.yaml
index 68fb0bb..76099a0 100644
--- a/hack/sample/postgres-k8s/cluster.yaml
+++ b/hack/sample/postgres-k8s/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
diff --git a/hack/sample/postgres-local/cluster.yaml b/hack/sample/postgres-local/cluster.yaml
index 0b33071..45c0925 100644
--- a/hack/sample/postgres-local/cluster.yaml
+++ b/hack/sample/postgres-local/cluster.yaml
@@ -1,20 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+---
 apiVersion: airflow.apache.org/v1alpha1
 kind: AirflowCluster
 metadata:
diff --git a/license-templates/LICENSE.txt b/license-templates/LICENSE.txt
new file mode 100644
index 0000000..8853bce
--- /dev/null
+++ b/license-templates/LICENSE.txt
@@ -0,0 +1,14 @@
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/templates/airflow-configmap.yaml b/templates/airflow-configmap.yaml
index 9e560e5..e991045 100644
--- a/templates/airflow-configmap.yaml
+++ b/templates/airflow-configmap.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: ConfigMap
 metadata:
@@ -186,7 +186,7 @@
     worker_container_tag = {{.Cluster.Spec.Worker.Version}}
     worker_container_image_pull_policy = IfNotPresent
     delete_worker_pods = True
-    worker_service_account_name = 
+    worker_service_account_name =
     git_repo = {{.Cluster.Spec.DAGs.Git.Repo}}
     git_branch = {{.Cluster.Spec.DAGs.Git.Branch}}
     git_subpath = {{.Cluster.Spec.DAGs.DagSubdir}}
@@ -196,7 +196,7 @@
     git_password =
     in_cluster = True
     namespace = {{.Namespace}}
-    gcp_service_account_keys = 
+    gcp_service_account_keys =
 
     # For cloning DAGs from git repositories into volumes: https://github.com/kubernetes/git-sync
     git_sync_container_repository = gcr.io/google-containers/git-sync-amd64
diff --git a/templates/base-application.yaml b/templates/base-application.yaml
index 4cd2422..3aeb3ca 100644
--- a/templates/base-application.yaml
+++ b/templates/base-application.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: app.k8s.io/v1beta1
 kind: Application
 metadata:
@@ -39,7 +39,7 @@
     description: |-
       Apache Airflow is a platform to programmatically author, schedule and monitor workflows.
       AirflowBase deploys the common components (sql,storage) needed for Airflow cluster.
-  
+
       # Support
       Google does not offer support for this solution. However, community support is available on
       [Stack Overflow](https://stackoverflow.com/questions/tagged/airflow/).
@@ -50,4 +50,4 @@
     links:
     - description: Apache Airflow documentations
       url: https://airflow.apache.org/
-    notes: 
+    notes:
diff --git a/templates/cluster-application.yaml b/templates/cluster-application.yaml
index 35518bd..f736b6a 100644
--- a/templates/cluster-application.yaml
+++ b/templates/cluster-application.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: app.k8s.io/v1beta1
 kind: Application
 metadata:
@@ -39,7 +39,7 @@
     description: |-
       Apache Airflow is a platform to programmatically author, schedule and monitor workflows.
       AirflowCluster deploys the Airflow components and rely on AirflowBase.
-  
+
       # Support
       Google does not offer support for this solution. However, community support is available on
       [Stack Overflow](https://stackoverflow.com/questions/tagged/airflow/).
@@ -50,4 +50,4 @@
     links:
     - description: Apache Airflow documentations
       url: https://airflow.apache.org/
-    notes: 
+    notes:
diff --git a/templates/flower-sts.yaml b/templates/flower-sts.yaml
index c74ed5d..972f36d 100644
--- a/templates/flower-sts.yaml
+++ b/templates/flower-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/headlesssvc.yaml b/templates/headlesssvc.yaml
index 91c9256..a71c7aa 100644
--- a/templates/headlesssvc.yaml
+++ b/templates/headlesssvc.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: Service
 metadata:
diff --git a/templates/mysql-sts.yaml b/templates/mysql-sts.yaml
index 8cb3dae..7cb1d09 100644
--- a/templates/mysql-sts.yaml
+++ b/templates/mysql-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/nfs-sts.yaml b/templates/nfs-sts.yaml
index dc7a367..f40bef8 100644
--- a/templates/nfs-sts.yaml
+++ b/templates/nfs-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/pdb.yaml b/templates/pdb.yaml
index 4444a1b..abdfd2a 100644
--- a/templates/pdb.yaml
+++ b/templates/pdb.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: policy/v1beta1
 kind: PodDisruptionBudget
 metadata:
diff --git a/templates/postgres-sts.yaml b/templates/postgres-sts.yaml
index 22db9f7..e9414d3 100644
--- a/templates/postgres-sts.yaml
+++ b/templates/postgres-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/redis-sts.yaml b/templates/redis-sts.yaml
index 6d465b5..fe2bb38 100644
--- a/templates/redis-sts.yaml
+++ b/templates/redis-sts.yaml
@@ -1,19 +1,20 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/rolebinding.yaml b/templates/rolebinding.yaml
index 61bb600..512f030 100644
--- a/templates/rolebinding.yaml
+++ b/templates/rolebinding.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
 metadata:
diff --git a/templates/scheduler-sts.yaml b/templates/scheduler-sts.yaml
index d4ddfc7..6874355 100644
--- a/templates/scheduler-sts.yaml
+++ b/templates/scheduler-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/secret.yaml b/templates/secret.yaml
index fe665b8..0cae10d 100644
--- a/templates/secret.yaml
+++ b/templates/secret.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: Secret
 metadata:
diff --git a/templates/serviceaccount.yaml b/templates/serviceaccount.yaml
index 70302fa..b5831b3 100644
--- a/templates/serviceaccount.yaml
+++ b/templates/serviceaccount.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: ServiceAccount
 metadata:
diff --git a/templates/sqlproxy-sts.yaml b/templates/sqlproxy-sts.yaml
index 832b1ab..090ba8f 100644
--- a/templates/sqlproxy-sts.yaml
+++ b/templates/sqlproxy-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/storage.yaml b/templates/storage.yaml
index ed02427..7578f8d 100644
--- a/templates/storage.yaml
+++ b/templates/storage.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 kind: StorageClass
 apiVersion: storage.k8s.io/v1
 metadata:
diff --git a/templates/svc.yaml b/templates/svc.yaml
index 1c0e82f..c953159 100644
--- a/templates/svc.yaml
+++ b/templates/svc.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: v1
 kind: Service
 metadata:
diff --git a/templates/ui-sts.yaml b/templates/ui-sts.yaml
index 519c197..b0fbe1a 100644
--- a/templates/ui-sts.yaml
+++ b/templates/ui-sts.yaml
@@ -1,19 +1,19 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/templates/worker-sts.yaml b/templates/worker-sts.yaml
index f00a93c..b2d81cb 100644
--- a/templates/worker-sts.yaml
+++ b/templates/worker-sts.yaml
@@ -1,19 +1,18 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements. See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership. The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License. You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 #
-#   http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the
-# specific language governing permissions and limitations
-# under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
diff --git a/yamllint-config.yaml b/yamllint-config.yaml
new file mode 100644
index 0000000..bd85d17
--- /dev/null
+++ b/yamllint-config.yaml
@@ -0,0 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+---
+extends: default
+
+rules:
+  line-length:
+    max: 200