#
# 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.
#

{{ if or .Values.metrics.prometheusEnabled .Values.metrics.userMetricsEnabled }}
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: {{ .Release.Name }}-prometheus-server
  labels:
    name: {{ .Release.Name }}-prometheus-server
{{ include "openwhisk.label_boilerplate" . | indent 4 }}
spec:
  serviceName: {{ .Release.Name }}-prometheus-server
  replicas: {{ .Values.prometheus.replicaCount }}
  selector:
    matchLabels:
      name: {{ .Release.Name }}-prometheus-server
  template:
    metadata:
      labels:
        name: {{ .Release.Name }}-prometheus-server
{{ include "openwhisk.label_boilerplate" . | indent 8 }}
    spec:
      restartPolicy: {{ .Values.user_events.restartPolicy }}
      {{- if .Values.affinity.enabled }}
      affinity:
{{ include "openwhisk.affinity.core" . | indent 8 }}
{{ include "openwhisk.affinity.selfAntiAffinity" ( printf "%s-prometheus-server" .Release.Name ) | indent 8 }}
      {{- end }}

      {{- if .Values.toleration.enabled }}
      tolerations:
{{ include "openwhisk.toleration.core" . | indent 8 }}
      {{- end }}

      securityContext:
        fsGroup: 2000
        runAsUser: 1000
        runAsNonRoot: true
      serviceAccountName: {{ .Release.Name }}-prometheus-server
      containers:
        - name: prometheus
          imagePullPolicy: {{ .Values.prometheus.imagePullPolicy | quote }}
          image: "{{- .Values.docker.registry.name -}}{{- .Values.prometheus.imageName -}}:{{- .Values.prometheus.imageTag -}}"
          args:
            - "--config.file=/etc/prometheus/prometheus.yaml"
            - "--storage.tsdb.path={{ .Values.prometheus.persistentVolume.mountPath }}"
          ports:
            - containerPort: {{ .Values.prometheus.port }}
          livenessProbe:
            httpGet:
              path: /-/healthy
              port: {{ .Values.prometheus.port }}
            initialDelaySeconds: 30
            timeoutSeconds: 5
          readinessProbe:
            httpGet:
              path: /-/healthy
              port: {{ .Values.prometheus.port }}

          volumeMounts:
            - name: prometheus-config-volume
              mountPath: /etc/prometheus/
            - name: prometheus-storage-volume
              mountPath: {{ .Values.prometheus.persistentVolume.mountPath }}

      volumes:
      - name: prometheus-config-volume
        configMap:
          name: "{{ .Release.Name }}-prometheus-configuration"
      - name: prometheus-storage-volume
{{- if and .Values.k8s.persistence.enabled (eq (int .Values.prometheus.replicaCount) 1) }}
        persistentVolumeClaim:
          claimName: "{{ .Release.Name }}-prometheus-pvc"
{{- else }}
        emptyDir: {}
{{- end }}
{{- end }}