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| <h1>Source code for airflow.contrib.example_dags.example_gcp_bigtable_operators</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># -*- coding: utf-8 -*-</span> |
| <span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># 'License'); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| |
| <span class="c1"># noinspection LongLine</span> |
| <span class="sd">"""</span> |
| <span class="sd">Example Airflow DAG that creates and performs following operations on Cloud Bigtable:</span> |
| <span class="sd">- creates an Instance</span> |
| <span class="sd">- creates a Table</span> |
| <span class="sd">- updates Cluster</span> |
| <span class="sd">- waits for Table replication completeness</span> |
| <span class="sd">- deletes the Table</span> |
| <span class="sd">- deletes the Instance</span> |
| |
| <span class="sd">This DAG relies on the following environment variables:</span> |
| |
| <span class="sd">* GCP_PROJECT_ID - Google Cloud Platform project</span> |
| <span class="sd">* CBT_INSTANCE_ID - desired ID of a Cloud Bigtable instance</span> |
| <span class="sd">* CBT_INSTANCE_DISPLAY_NAME - desired human-readable display name of the Instance</span> |
| <span class="sd">* CBT_INSTANCE_TYPE - type of the Instance, e.g. 1 for DEVELOPMENT</span> |
| <span class="sd"> See https://googleapis.github.io/google-cloud-python/latest/bigtable/instance.html#google.cloud.bigtable.instance.Instance # noqa E501</span> |
| <span class="sd">* CBT_INSTANCE_LABELS - labels to add for the Instance</span> |
| <span class="sd">* CBT_CLUSTER_ID - desired ID of the main Cluster created for the Instance</span> |
| <span class="sd">* CBT_CLUSTER_ZONE - zone in which main Cluster will be created. e.g. europe-west1-b</span> |
| <span class="sd"> See available zones: https://cloud.google.com/bigtable/docs/locations</span> |
| <span class="sd">* CBT_CLUSTER_NODES - initial amount of nodes of the Cluster</span> |
| <span class="sd">* CBT_CLUSTER_NODES_UPDATED - amount of nodes for BigtableClusterUpdateOperator</span> |
| <span class="sd">* CBT_CLUSTER_STORAGE_TYPE - storage for the Cluster, e.g. 1 for SSD</span> |
| <span class="sd"> See https://googleapis.github.io/google-cloud-python/latest/bigtable/instance.html#google.cloud.bigtable.instance.Instance.cluster # noqa E501</span> |
| <span class="sd">* CBT_TABLE_ID - desired ID of the Table</span> |
| <span class="sd">* CBT_POKE_INTERVAL - number of seconds between every attempt of Sensor check</span> |
| |
| <span class="sd">"""</span> |
| <span class="kn">import</span> <span class="nn">json</span> |
| |
| <span class="kn">from</span> <span class="nn">os</span> <span class="k">import</span> <span class="n">getenv</span> |
| |
| <span class="kn">import</span> <span class="nn">airflow</span> |
| <span class="kn">from</span> <span class="nn">airflow</span> <span class="k">import</span> <span class="n">models</span> |
| <span class="kn">from</span> <span class="nn">airflow.contrib.operators.gcp_bigtable_operator</span> <span class="k">import</span> \ |
| <span class="n">BigtableInstanceCreateOperator</span><span class="p">,</span> \ |
| <span class="n">BigtableInstanceDeleteOperator</span><span class="p">,</span> \ |
| <span class="n">BigtableClusterUpdateOperator</span><span class="p">,</span> \ |
| <span class="n">BigtableTableCreateOperator</span><span class="p">,</span> \ |
| <span class="n">BigtableTableWaitForReplicationSensor</span><span class="p">,</span> \ |
| <span class="n">BigtableTableDeleteOperator</span> |
| |
| <span class="c1"># [START howto_operator_gcp_bigtable_args]</span> |
| <span class="n">GCP_PROJECT_ID</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'GCP_PROJECT_ID'</span><span class="p">,</span> <span class="s1">'example-project'</span><span class="p">)</span> |
| <span class="n">CBT_INSTANCE_ID</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_INSTANCE_ID'</span><span class="p">,</span> <span class="s1">'some-instance-id'</span><span class="p">)</span> |
| <span class="n">CBT_INSTANCE_DISPLAY_NAME</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_INSTANCE_DISPLAY_NAME'</span><span class="p">,</span> <span class="s1">'Human-readable name'</span><span class="p">)</span> |
| <span class="n">CBT_INSTANCE_TYPE</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_INSTANCE_TYPE'</span><span class="p">,</span> <span class="s1">'2'</span><span class="p">)</span> |
| <span class="n">CBT_INSTANCE_LABELS</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_INSTANCE_LABELS'</span><span class="p">,</span> <span class="s1">'</span><span class="si">{}</span><span class="s1">'</span><span class="p">)</span> |
| <span class="n">CBT_CLUSTER_ID</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_CLUSTER_ID'</span><span class="p">,</span> <span class="s1">'some-cluster-id'</span><span class="p">)</span> |
| <span class="n">CBT_CLUSTER_ZONE</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_CLUSTER_ZONE'</span><span class="p">,</span> <span class="s1">'europe-west1-b'</span><span class="p">)</span> |
| <span class="n">CBT_CLUSTER_NODES</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_CLUSTER_NODES'</span><span class="p">,</span> <span class="s1">'3'</span><span class="p">)</span> |
| <span class="n">CBT_CLUSTER_NODES_UPDATED</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_CLUSTER_NODES_UPDATED'</span><span class="p">,</span> <span class="s1">'5'</span><span class="p">)</span> |
| <span class="n">CBT_CLUSTER_STORAGE_TYPE</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_CLUSTER_STORAGE_TYPE'</span><span class="p">,</span> <span class="s1">'2'</span><span class="p">)</span> |
| <span class="n">CBT_TABLE_ID</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_TABLE_ID'</span><span class="p">,</span> <span class="s1">'some-table-id'</span><span class="p">)</span> |
| <span class="n">CBT_POKE_INTERVAL</span> <span class="o">=</span> <span class="n">getenv</span><span class="p">(</span><span class="s1">'CBT_POKE_INTERVAL'</span><span class="p">,</span> <span class="s1">'60'</span><span class="p">)</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_args]</span> |
| |
| <span class="n">default_args</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s1">'start_date'</span><span class="p">:</span> <span class="n">airflow</span><span class="o">.</span><span class="n">utils</span><span class="o">.</span><span class="n">dates</span><span class="o">.</span><span class="n">days_ago</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> |
| <span class="p">}</span> |
| |
| <span class="k">with</span> <span class="n">models</span><span class="o">.</span><span class="n">DAG</span><span class="p">(</span> |
| <span class="s1">'example_gcp_bigtable_operators'</span><span class="p">,</span> |
| <span class="n">default_args</span><span class="o">=</span><span class="n">default_args</span><span class="p">,</span> |
| <span class="n">schedule_interval</span><span class="o">=</span><span class="kc">None</span> <span class="c1"># Override to match your needs</span> |
| <span class="p">)</span> <span class="k">as</span> <span class="n">dag</span><span class="p">:</span> |
| <span class="c1"># [START howto_operator_gcp_bigtable_instance_create]</span> |
| <span class="n">create_instance_task</span> <span class="o">=</span> <span class="n">BigtableInstanceCreateOperator</span><span class="p">(</span> |
| <span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">main_cluster_id</span><span class="o">=</span><span class="n">CBT_CLUSTER_ID</span><span class="p">,</span> |
| <span class="n">main_cluster_zone</span><span class="o">=</span><span class="n">CBT_CLUSTER_ZONE</span><span class="p">,</span> |
| <span class="n">instance_display_name</span><span class="o">=</span><span class="n">CBT_INSTANCE_DISPLAY_NAME</span><span class="p">,</span> |
| <span class="n">instance_type</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_INSTANCE_TYPE</span><span class="p">),</span> |
| <span class="n">instance_labels</span><span class="o">=</span><span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">CBT_INSTANCE_LABELS</span><span class="p">),</span> |
| <span class="n">cluster_nodes</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_CLUSTER_NODES</span><span class="p">),</span> |
| <span class="n">cluster_storage_type</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_CLUSTER_STORAGE_TYPE</span><span class="p">),</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'create_instance_task'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">create_instance_task2</span> <span class="o">=</span> <span class="n">BigtableInstanceCreateOperator</span><span class="p">(</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">main_cluster_id</span><span class="o">=</span><span class="n">CBT_CLUSTER_ID</span><span class="p">,</span> |
| <span class="n">main_cluster_zone</span><span class="o">=</span><span class="n">CBT_CLUSTER_ZONE</span><span class="p">,</span> |
| <span class="n">instance_display_name</span><span class="o">=</span><span class="n">CBT_INSTANCE_DISPLAY_NAME</span><span class="p">,</span> |
| <span class="n">instance_type</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_INSTANCE_TYPE</span><span class="p">),</span> |
| <span class="n">instance_labels</span><span class="o">=</span><span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">CBT_INSTANCE_LABELS</span><span class="p">),</span> |
| <span class="n">cluster_nodes</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_CLUSTER_NODES</span><span class="p">),</span> |
| <span class="n">cluster_storage_type</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_CLUSTER_STORAGE_TYPE</span><span class="p">),</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'create_instance_task2'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">create_instance_task</span> <span class="o">>></span> <span class="n">create_instance_task2</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_instance_create]</span> |
| |
| <span class="c1"># [START howto_operator_gcp_bigtable_cluster_update]</span> |
| <span class="n">cluster_update_task</span> <span class="o">=</span> <span class="n">BigtableClusterUpdateOperator</span><span class="p">(</span> |
| <span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">cluster_id</span><span class="o">=</span><span class="n">CBT_CLUSTER_ID</span><span class="p">,</span> |
| <span class="n">nodes</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_CLUSTER_NODES_UPDATED</span><span class="p">),</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'update_cluster_task'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">cluster_update_task2</span> <span class="o">=</span> <span class="n">BigtableClusterUpdateOperator</span><span class="p">(</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">cluster_id</span><span class="o">=</span><span class="n">CBT_CLUSTER_ID</span><span class="p">,</span> |
| <span class="n">nodes</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_CLUSTER_NODES_UPDATED</span><span class="p">),</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'update_cluster_task2'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">cluster_update_task</span> <span class="o">>></span> <span class="n">cluster_update_task2</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_cluster_update]</span> |
| |
| <span class="c1"># [START howto_operator_gcp_bigtable_instance_delete]</span> |
| <span class="n">delete_instance_task</span> <span class="o">=</span> <span class="n">BigtableInstanceDeleteOperator</span><span class="p">(</span> |
| <span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'delete_instance_task'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">delete_instance_task2</span> <span class="o">=</span> <span class="n">BigtableInstanceDeleteOperator</span><span class="p">(</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'delete_instance_task2'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_instance_delete]</span> |
| |
| <span class="c1"># [START howto_operator_gcp_bigtable_table_create]</span> |
| <span class="n">create_table_task</span> <span class="o">=</span> <span class="n">BigtableTableCreateOperator</span><span class="p">(</span> |
| <span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="n">CBT_TABLE_ID</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'create_table'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">create_table_task2</span> <span class="o">=</span> <span class="n">BigtableTableCreateOperator</span><span class="p">(</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="n">CBT_TABLE_ID</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'create_table_task2'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">create_table_task</span> <span class="o">>></span> <span class="n">create_table_task2</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_table_create]</span> |
| |
| <span class="c1"># [START howto_operator_gcp_bigtable_table_wait_for_replication]</span> |
| <span class="n">wait_for_table_replication_task</span> <span class="o">=</span> <span class="n">BigtableTableWaitForReplicationSensor</span><span class="p">(</span> |
| <span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="n">CBT_TABLE_ID</span><span class="p">,</span> |
| <span class="n">poke_interval</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_POKE_INTERVAL</span><span class="p">),</span> |
| <span class="n">timeout</span><span class="o">=</span><span class="mi">180</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'wait_for_table_replication_task'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">wait_for_table_replication_task2</span> <span class="o">=</span> <span class="n">BigtableTableWaitForReplicationSensor</span><span class="p">(</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="n">CBT_TABLE_ID</span><span class="p">,</span> |
| <span class="n">poke_interval</span><span class="o">=</span><span class="nb">int</span><span class="p">(</span><span class="n">CBT_POKE_INTERVAL</span><span class="p">),</span> |
| <span class="n">timeout</span><span class="o">=</span><span class="mi">180</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'wait_for_table_replication_task2'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_table_wait_for_replication]</span> |
| |
| <span class="c1"># [START howto_operator_gcp_bigtable_table_delete]</span> |
| <span class="n">delete_table_task</span> <span class="o">=</span> <span class="n">BigtableTableDeleteOperator</span><span class="p">(</span> |
| <span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="n">CBT_TABLE_ID</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'delete_table_task'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">delete_table_task2</span> <span class="o">=</span> <span class="n">BigtableTableDeleteOperator</span><span class="p">(</span> |
| <span class="n">instance_id</span><span class="o">=</span><span class="n">CBT_INSTANCE_ID</span><span class="p">,</span> |
| <span class="n">table_id</span><span class="o">=</span><span class="n">CBT_TABLE_ID</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'delete_table_task2'</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="c1"># [END howto_operator_gcp_bigtable_table_delete]</span> |
| |
| <span class="n">wait_for_table_replication_task</span> <span class="o">>></span> <span class="n">delete_table_task</span> |
| <span class="n">wait_for_table_replication_task2</span> <span class="o">>></span> <span class="n">delete_table_task</span> |
| <span class="n">wait_for_table_replication_task</span> <span class="o">>></span> <span class="n">delete_table_task2</span> |
| <span class="n">wait_for_table_replication_task2</span> <span class="o">>></span> <span class="n">delete_table_task2</span> |
| <span class="n">create_instance_task</span> \ |
| <span class="o">>></span> <span class="n">create_table_task</span> \ |
| <span class="o">>></span> <span class="n">cluster_update_task</span> \ |
| <span class="o">>></span> <span class="n">delete_table_task</span> |
| <span class="n">create_instance_task2</span> \ |
| <span class="o">>></span> <span class="n">create_table_task2</span> \ |
| <span class="o">>></span> <span class="n">cluster_update_task2</span> \ |
| <span class="o">>></span> <span class="n">delete_table_task2</span> |
| |
| <span class="c1"># Only delete instances after all tables are deleted</span> |
| <span class="p">[</span><span class="n">delete_table_task</span><span class="p">,</span> <span class="n">delete_table_task2</span><span class="p">]</span> <span class="o">>></span> \ |
| <span class="n">delete_instance_task</span> <span class="o">>></span> <span class="n">delete_instance_task2</span> |
| </pre></div> |
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