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"""
Example Airflow DAG that creates and performs following operations on Cloud Bigtable:
- creates an Instance
- creates a Table
- updates Cluster
- waits for Table replication completeness
- deletes the Table
- deletes the Instance
This DAG relies on the following environment variables:
* GCP_PROJECT_ID - Google Cloud project
* CBT_INSTANCE_ID - desired ID of a Cloud Bigtable instance
* CBT_INSTANCE_DISPLAY_NAME - desired human-readable display name of the Instance
* CBT_INSTANCE_TYPE - type of the Instance, e.g. 1 for DEVELOPMENT
See https://googleapis.github.io/google-cloud-python/latest/bigtable/instance.html#google.cloud.bigtable.instance.Instance
* CBT_INSTANCE_LABELS - labels to add for the Instance
* CBT_CLUSTER_ID - desired ID of the main Cluster created for the Instance
* CBT_CLUSTER_ZONE - zone in which main Cluster will be created. e.g. europe-west1-b
See available zones: https://cloud.google.com/bigtable/docs/locations
* CBT_CLUSTER_NODES - initial amount of nodes of the Cluster
* CBT_CLUSTER_NODES_UPDATED - amount of nodes for BigtableClusterUpdateOperator
* CBT_CLUSTER_STORAGE_TYPE - storage for the Cluster, e.g. 1 for SSD
See https://googleapis.github.io/google-cloud-python/latest/bigtable/instance.html#google.cloud.bigtable.instance.Instance.cluster
* CBT_TABLE_ID - desired ID of the Table
* CBT_POKE_INTERVAL - number of seconds between every attempt of Sensor check
"""
from __future__ import annotations
import os
from datetime import datetime
from airflow.decorators import task_group
from airflow.models.dag import DAG
from airflow.providers.google.cloud.operators.bigtable import (
BigtableCreateInstanceOperator,
BigtableCreateTableOperator,
BigtableDeleteInstanceOperator,
BigtableDeleteTableOperator,
BigtableUpdateClusterOperator,
BigtableUpdateInstanceOperator,
)
from airflow.providers.google.cloud.sensors.bigtable import BigtableTableReplicationCompletedSensor
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]CBT_INSTANCE_ID = f"bigtable-instance-id-{ENV_ID}"
[docs]CBT_INSTANCE_DISPLAY_NAME = "Instance-name"
[docs]CBT_INSTANCE_DISPLAY_NAME_UPDATED = f"{CBT_INSTANCE_DISPLAY_NAME} - updated"
[docs]CBT_INSTANCE_TYPE_PROD = 1
[docs]CBT_INSTANCE_LABELS = {}
[docs]CBT_INSTANCE_LABELS_UPDATED = {"env": "prod"}
[docs]CBT_CLUSTER_ID = f"bigtable-cluster-id-{ENV_ID}"
[docs]CBT_CLUSTER_ZONE = "europe-west1-b"
[docs]CBT_CLUSTER_NODES_UPDATED = 5
[docs]CBT_CLUSTER_STORAGE_TYPE = 2
[docs]CBT_TABLE_ID = f"bigtable-table-id{ENV_ID}"
with DAG(
DAG_ID,
schedule="@once",
start_date=datetime(2021, 1, 1),
catchup=False,
tags=["bigtable", "example"],
) as dag:
# [START howto_operator_gcp_bigtable_instance_create]
[docs] create_instance_task = BigtableCreateInstanceOperator(
project_id=PROJECT_ID,
instance_id=CBT_INSTANCE_ID,
main_cluster_id=CBT_CLUSTER_ID,
main_cluster_zone=CBT_CLUSTER_ZONE,
instance_display_name=CBT_INSTANCE_DISPLAY_NAME,
instance_type=CBT_INSTANCE_TYPE,
instance_labels=CBT_INSTANCE_LABELS,
cluster_nodes=None,
cluster_storage_type=CBT_CLUSTER_STORAGE_TYPE,
task_id="create_instance_task",
)
create_instance_task2 = BigtableCreateInstanceOperator(
instance_id=CBT_INSTANCE_ID,
main_cluster_id=CBT_CLUSTER_ID,
main_cluster_zone=CBT_CLUSTER_ZONE,
instance_display_name=CBT_INSTANCE_DISPLAY_NAME,
instance_type=CBT_INSTANCE_TYPE,
instance_labels=CBT_INSTANCE_LABELS,
cluster_nodes=CBT_CLUSTER_NODES,
cluster_storage_type=CBT_CLUSTER_STORAGE_TYPE,
task_id="create_instance_task2",
)
# [END howto_operator_gcp_bigtable_instance_create]
@task_group()
def create_tables():
# [START howto_operator_gcp_bigtable_table_create]
create_table_task = BigtableCreateTableOperator(
project_id=PROJECT_ID,
instance_id=CBT_INSTANCE_ID,
table_id=CBT_TABLE_ID,
task_id="create_table",
)
create_table_task2 = BigtableCreateTableOperator(
instance_id=CBT_INSTANCE_ID,
table_id=CBT_TABLE_ID,
task_id="create_table_task2",
)
# [END howto_operator_gcp_bigtable_table_create]
create_table_task >> create_table_task2
@task_group()
def update_clusters_and_instance():
# [START howto_operator_gcp_bigtable_cluster_update]
cluster_update_task = BigtableUpdateClusterOperator(
project_id=PROJECT_ID,
instance_id=CBT_INSTANCE_ID,
cluster_id=CBT_CLUSTER_ID,
nodes=CBT_CLUSTER_NODES_UPDATED,
task_id="update_cluster_task",
)
cluster_update_task2 = BigtableUpdateClusterOperator(
instance_id=CBT_INSTANCE_ID,
cluster_id=CBT_CLUSTER_ID,
nodes=CBT_CLUSTER_NODES_UPDATED,
task_id="update_cluster_task2",
)
# [END howto_operator_gcp_bigtable_cluster_update]
# [START howto_operator_gcp_bigtable_instance_update]
update_instance_task = BigtableUpdateInstanceOperator(
instance_id=CBT_INSTANCE_ID,
instance_display_name=CBT_INSTANCE_DISPLAY_NAME_UPDATED,
instance_type=CBT_INSTANCE_TYPE_PROD,
instance_labels=CBT_INSTANCE_LABELS_UPDATED,
task_id="update_instance_task",
)
# [END howto_operator_gcp_bigtable_instance_update]
[cluster_update_task, cluster_update_task2] >> update_instance_task
# [START howto_operator_gcp_bigtable_table_wait_for_replication]
wait_for_table_replication_task = BigtableTableReplicationCompletedSensor(
instance_id=CBT_INSTANCE_ID,
table_id=CBT_TABLE_ID,
poke_interval=CBT_POKE_INTERVAL,
timeout=180,
task_id="wait_for_table_replication_task2",
)
# [END howto_operator_gcp_bigtable_table_wait_for_replication]
# [START howto_operator_gcp_bigtable_table_delete]
delete_table_task = BigtableDeleteTableOperator(
project_id=PROJECT_ID,
instance_id=CBT_INSTANCE_ID,
table_id=CBT_TABLE_ID,
task_id="delete_table_task",
)
delete_table_task2 = BigtableDeleteTableOperator(
instance_id=CBT_INSTANCE_ID,
table_id=CBT_TABLE_ID,
task_id="delete_table_task2",
)
# [END howto_operator_gcp_bigtable_table_delete]
delete_table_task.trigger_rule = TriggerRule.ALL_DONE
delete_table_task2.trigger_rule = TriggerRule.ALL_DONE
# [START howto_operator_gcp_bigtable_instance_delete]
delete_instance_task = BigtableDeleteInstanceOperator(
project_id=PROJECT_ID,
instance_id=CBT_INSTANCE_ID,
task_id="delete_instance_task",
)
delete_instance_task2 = BigtableDeleteInstanceOperator(
instance_id=CBT_INSTANCE_ID,
task_id="delete_instance_task2",
)
# [END howto_operator_gcp_bigtable_instance_delete]
delete_instance_task.trigger_rule = TriggerRule.ALL_DONE
delete_instance_task2.trigger_rule = TriggerRule.ALL_DONE
(
[create_instance_task, create_instance_task2]
>> create_tables()
>> wait_for_table_replication_task
>> update_clusters_and_instance()
>> delete_table_task
>> delete_table_task2
>> [delete_instance_task, delete_instance_task2]
)
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)
