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112 lines
4.2 KiB
112 lines
4.2 KiB
# |
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# Licensed to the Apache Software Foundation (ASF) under one |
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# or more contributor license agreements. See the NOTICE file |
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# distributed with this work for additional information |
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# regarding copyright ownership. The ASF licenses this file |
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# to you under the Apache License, Version 2.0 (the |
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# "License"); you may not use this file except in compliance |
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# with the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, |
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# software distributed under the License is distributed on an |
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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# KIND, either express or implied. See the License for the |
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# specific language governing permissions and limitations |
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# under the License. |
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""" |
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Example Airflow DAG that starts, stops and sets the machine type of a Google Compute |
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Engine instance. |
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This DAG relies on the following OS environment variables |
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* GCP_PROJECT_ID - Google Cloud project where the Compute Engine instance exists. |
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* GCE_ZONE - Google Cloud zone where the instance exists. |
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* GCE_INSTANCE - Name of the Compute Engine instance. |
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* GCE_SHORT_MACHINE_TYPE_NAME - Machine type resource name to set, e.g. 'n1-standard-1'. |
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See https://cloud.google.com/compute/docs/machine-types |
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""" |
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import os |
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from airflow import models |
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from airflow.providers.google.cloud.operators.compute import ( |
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ComputeEngineSetMachineTypeOperator, |
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ComputeEngineStartInstanceOperator, |
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ComputeEngineStopInstanceOperator, |
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) |
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from airflow.utils.dates import days_ago |
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# [START howto_operator_gce_args_common] |
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GCP_PROJECT_ID = os.environ.get("GCP_PROJECT_ID", "example-project") |
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GCE_ZONE = os.environ.get("GCE_ZONE", "europe-west1-b") |
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GCE_INSTANCE = os.environ.get("GCE_INSTANCE", "testinstance") |
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# [END howto_operator_gce_args_common] |
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GCE_SHORT_MACHINE_TYPE_NAME = os.environ.get( |
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"GCE_SHORT_MACHINE_TYPE_NAME", "n1-standard-1" |
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) |
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with models.DAG( |
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"example_gcp_compute", |
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schedule_interval=None, # Override to match your needs |
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start_date=days_ago(1), |
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tags=["example"], |
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) as dag: |
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# [START howto_operator_gce_start] |
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gce_instance_start = ComputeEngineStartInstanceOperator( |
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project_id=GCP_PROJECT_ID, |
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zone=GCE_ZONE, |
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resource_id=GCE_INSTANCE, |
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task_id="gcp_compute_start_task", |
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) |
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# [END howto_operator_gce_start] |
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# Duplicate start for idempotence testing |
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# [START howto_operator_gce_start_no_project_id] |
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gce_instance_start2 = ComputeEngineStartInstanceOperator( |
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zone=GCE_ZONE, resource_id=GCE_INSTANCE, task_id="gcp_compute_start_task2" |
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) |
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# [END howto_operator_gce_start_no_project_id] |
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# [START howto_operator_gce_stop] |
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gce_instance_stop = ComputeEngineStopInstanceOperator( |
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project_id=GCP_PROJECT_ID, |
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zone=GCE_ZONE, |
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resource_id=GCE_INSTANCE, |
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task_id="gcp_compute_stop_task", |
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) |
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# [END howto_operator_gce_stop] |
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# Duplicate stop for idempotence testing |
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# [START howto_operator_gce_stop_no_project_id] |
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gce_instance_stop2 = ComputeEngineStopInstanceOperator( |
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zone=GCE_ZONE, resource_id=GCE_INSTANCE, task_id="gcp_compute_stop_task2" |
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) |
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# [END howto_operator_gce_stop_no_project_id] |
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# [START howto_operator_gce_set_machine_type] |
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gce_set_machine_type = ComputeEngineSetMachineTypeOperator( |
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project_id=GCP_PROJECT_ID, |
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zone=GCE_ZONE, |
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resource_id=GCE_INSTANCE, |
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body={ |
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"machineType": f"zones/{GCE_ZONE}/machineTypes/{GCE_SHORT_MACHINE_TYPE_NAME}" |
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}, |
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task_id="gcp_compute_set_machine_type", |
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) |
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# [END howto_operator_gce_set_machine_type] |
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# Duplicate set machine type for idempotence testing |
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# [START howto_operator_gce_set_machine_type_no_project_id] |
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gce_set_machine_type2 = ComputeEngineSetMachineTypeOperator( |
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zone=GCE_ZONE, |
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resource_id=GCE_INSTANCE, |
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body={ |
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"machineType": f"zones/{GCE_ZONE}/machineTypes/{GCE_SHORT_MACHINE_TYPE_NAME}" |
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}, |
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task_id="gcp_compute_set_machine_type2", |
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) |
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# [END howto_operator_gce_set_machine_type_no_project_id] |
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gce_instance_start >> gce_instance_start2 >> gce_instance_stop >> gce_instance_stop2 |
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gce_instance_stop2 >> gce_set_machine_type >> gce_set_machine_type2
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