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"""
Example Airflow DAG that:
* creates a copy of existing Instance Template
* updates existing template in Instance Group Manager
"""
from __future__ import annotations
import os
from datetime import datetime
from airflow import models
from airflow.models.baseoperator import chain
from airflow.operators.bash import BashOperator
from airflow.providers.google.cloud.operators.compute import (
ComputeEngineCopyInstanceTemplateOperator,
ComputeEngineDeleteInstanceGroupManagerOperator,
ComputeEngineDeleteInstanceTemplateOperator,
ComputeEngineInsertInstanceGroupManagerOperator,
ComputeEngineInsertInstanceTemplateOperator,
ComputeEngineInstanceGroupUpdateManagerTemplateOperator,
)
from airflow.utils.trigger_rule import TriggerRule
[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT")
[docs]LOCATION = "europe-west1-b"
[docs]SHORT_MACHINE_TYPE_NAME = "n1-standard-1"
[docs]DAG_ID = "cloud_compute_igm"
# [START howto_operator_compute_template_copy_args]
[docs]TEMPLATE_NAME = "instance-template-igm-test"
[docs]NEW_TEMPLATE_NAME = "instance-template-test-new"
[docs]INSTANCE_TEMPLATE_BODY = {
"name": TEMPLATE_NAME,
"properties": {
"machine_type": SHORT_MACHINE_TYPE_NAME,
"disks": [
{
"auto_delete": True,
"boot": True,
"device_name": TEMPLATE_NAME,
"initialize_params": {
"disk_size_gb": "10",
"disk_type": "pd-balanced",
"source_image": "projects/debian-cloud/global/images/debian-11-bullseye-v20220621",
},
}
],
"network_interfaces": [{"network": "global/networks/default"}],
},
}
[docs]NEW_DESCRIPTION = "Test new description"
[docs]INSTANCE_TEMPLATE_BODY_UPDATE = {
"name": NEW_TEMPLATE_NAME,
"description": NEW_DESCRIPTION,
"properties": {"machine_type": "n1-standard-2"},
}
# [END howto_operator_compute_template_copy_args]
# [START howto_operator_compute_igm_update_template_args]
[docs]INSTANCE_GROUP_MANAGER_NAME = "instance-group-test"
[docs]INSTANCE_GROUP_MANAGER_BODY = {
"name": INSTANCE_GROUP_MANAGER_NAME,
"base_instance_name": INSTANCE_GROUP_MANAGER_NAME,
"instance_template": f"global/instanceTemplates/{TEMPLATE_NAME}",
"target_size": 1,
}
[docs]SOURCE_TEMPLATE_URL = (
f"https://www.googleapis.com/compute/beta/projects/{PROJECT_ID}/"
f"global/instanceTemplates/{TEMPLATE_NAME}"
)
[docs]DESTINATION_TEMPLATE_URL = (
f"https://www.googleapis.com/compute/beta/projects/{PROJECT_ID}/"
f"global/instanceTemplates/{NEW_TEMPLATE_NAME}"
)
[docs]UPDATE_POLICY = {
"type": "OPPORTUNISTIC",
"minimalAction": "RESTART",
"maxSurge": {"fixed": 1},
"minReadySec": 1800,
}
# [END howto_operator_compute_igm_update_template_args]
with models.DAG(
DAG_ID,
schedule_interval="@once",
start_date=datetime(2021, 1, 1),
catchup=False,
tags=["example"],
) as dag:
# [START howto_operator_gce_igm_insert_template]
[docs] gce_instance_template_insert = ComputeEngineInsertInstanceTemplateOperator(
task_id="gcp_compute_create_template_task",
project_id=PROJECT_ID,
body=INSTANCE_TEMPLATE_BODY,
)
# [END howto_operator_gce_igm_insert_template]
# Added to check for idempotence
# [START howto_operator_gce_igm_insert_template_no_project_id]
gce_instance_template_insert2 = ComputeEngineInsertInstanceTemplateOperator(
task_id="gcp_compute_create_template_task_2",
body=INSTANCE_TEMPLATE_BODY,
)
# [END howto_operator_gce_igm_insert_template_no_project_id]
# [START howto_operator_gce_igm_copy_template]
gce_instance_template_copy = ComputeEngineCopyInstanceTemplateOperator(
task_id="gcp_compute_igm_copy_template_task",
project_id=PROJECT_ID,
resource_id=TEMPLATE_NAME,
body_patch=INSTANCE_TEMPLATE_BODY_UPDATE,
)
# [END howto_operator_gce_igm_copy_template]
# Added to check for idempotence
# [START howto_operator_gce_igm_copy_template_no_project_id]
gce_instance_template_copy2 = ComputeEngineCopyInstanceTemplateOperator(
task_id="gcp_compute_igm_copy_template_task_2",
resource_id=TEMPLATE_NAME,
body_patch=INSTANCE_TEMPLATE_BODY_UPDATE,
)
# [END howto_operator_gce_igm_copy_template_no_project_id]
# [START howto_operator_gce_insert_igm]
gce_igm_insert = ComputeEngineInsertInstanceGroupManagerOperator(
task_id="gcp_compute_create_group_task",
zone=LOCATION,
body=INSTANCE_GROUP_MANAGER_BODY,
project_id=PROJECT_ID,
)
# [END howto_operator_gce_insert_igm]
# Added to check for idempotence
# [START howto_operator_gce_insert_igm_no_project_id]
gce_igm_insert2 = ComputeEngineInsertInstanceGroupManagerOperator(
task_id="gcp_compute_create_group_task_2",
zone=LOCATION,
body=INSTANCE_GROUP_MANAGER_BODY,
)
# [END howto_operator_gce_insert_igm_no_project_id]
bash_wait_operator = BashOperator(task_id="delay_bash_task", bash_command="sleep 3m")
# [START howto_operator_gce_igm_update_template]
gce_instance_group_manager_update_template = ComputeEngineInstanceGroupUpdateManagerTemplateOperator(
task_id="gcp_compute_igm_group_manager_update_template",
project_id=PROJECT_ID,
resource_id=INSTANCE_GROUP_MANAGER_NAME,
zone=LOCATION,
source_template=SOURCE_TEMPLATE_URL,
destination_template=DESTINATION_TEMPLATE_URL,
update_policy=UPDATE_POLICY,
)
# [END howto_operator_gce_igm_update_template]
# Added to check for idempotence (and without UPDATE_POLICY)
# [START howto_operator_gce_igm_update_template_no_project_id]
gce_instance_group_manager_update_template2 = ComputeEngineInstanceGroupUpdateManagerTemplateOperator(
task_id="gcp_compute_igm_group_manager_update_template_2",
resource_id=INSTANCE_GROUP_MANAGER_NAME,
zone=LOCATION,
source_template=SOURCE_TEMPLATE_URL,
destination_template=DESTINATION_TEMPLATE_URL,
)
# [END howto_operator_gce_igm_update_template_no_project_id]
bash_wait_operator1 = BashOperator(task_id="delay_bash_task_1", bash_command="sleep 3m")
# [START howto_operator_gce_delete_old_template_no_project_id]
gce_instance_template_old_delete = ComputeEngineDeleteInstanceTemplateOperator(
task_id="gcp_compute_delete_old_template_task",
resource_id=TEMPLATE_NAME,
)
# [END howto_operator_gce_delete_old_template_no_project_id]
gce_instance_template_old_delete.trigger_rule = TriggerRule.ALL_DONE
# [START howto_operator_gce_delete_new_template_no_project_id]
gce_instance_template_new_delete = ComputeEngineDeleteInstanceTemplateOperator(
task_id="gcp_compute_delete_new_template_task",
resource_id=NEW_TEMPLATE_NAME,
)
# [END howto_operator_gce_delete_new_template_no_project_id]
gce_instance_template_new_delete.trigger_rule = TriggerRule.ALL_DONE
# [START howto_operator_gce_delete_igm_no_project_id]
gce_igm_delete = ComputeEngineDeleteInstanceGroupManagerOperator(
task_id="gcp_compute_delete_group_task",
resource_id=INSTANCE_GROUP_MANAGER_NAME,
zone=LOCATION,
)
# [END howto_operator_gce_delete_igm_no_project_id]
gce_igm_delete.trigger_rule = TriggerRule.ALL_DONE
bash_wait_operator2 = BashOperator(task_id="delay_bash_task_2", bash_command="sleep 3m")
chain(
gce_instance_template_insert,
gce_instance_template_insert2,
gce_instance_template_copy,
gce_instance_template_copy2,
gce_igm_insert,
gce_igm_insert2,
bash_wait_operator,
gce_instance_group_manager_update_template,
gce_instance_group_manager_update_template2,
bash_wait_operator1,
gce_igm_delete,
gce_instance_template_old_delete,
gce_instance_template_new_delete,
bash_wait_operator2,
)
# ### Everything below this line is not part of example ###
# ### Just for system tests purpose ###
from tests.system.utils.watcher import watcher
# This test needs watcher in order to properly mark success/failure
# when "tearDown" task with trigger rule is part of the DAG
list(dag.tasks) >> watcher()
from tests.system.utils import get_test_run # noqa: E402
# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)
[docs]test_run = get_test_run(dag)
