Google Cloud Bigtable Operators¶

Prerequisite Tasks¶

To use these operators, you must do a few things:

Select or create a Cloud Platform project using the Cloud Console.

Enable billing for your project, as described in the Google Cloud documentation.

Enable the API, as described in the Cloud Console documentation.
Install API libraries via pip.
pip install 'apache-airflow[google]'
Detailed information is available for Installation.
Setup a Google Cloud Connection.

BigtableCreateInstanceOperator¶

Use the BigtableCreateInstanceOperator to create a Google Cloud Bigtable instance.

If the Cloud Bigtable instance with the given ID exists, the operator does not compare its configuration and immediately succeeds. No changes are made to the existing instance.

Using the operator¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

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",
)

BigtableUpdateInstanceOperator¶

Use the BigtableUpdateInstanceOperator to update an existing Google Cloud Bigtable instance.

Only the following configuration can be updated for an existing instance: instance_display_name, instance_type and instance_labels.

Using the operator¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

    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",
    )

BigtableDeleteInstanceOperator¶

Use the BigtableDeleteInstanceOperator to delete a Google Cloud Bigtable instance.

Using the operator¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

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",
)

BigtableUpdateClusterOperator¶

Use the BigtableUpdateClusterOperator to modify number of nodes in a Cloud Bigtable cluster.

Using the operator¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

    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",
    )

BigtableCreateTableOperator¶

Creates a table in a Cloud Bigtable instance.

If the table with given ID exists in the Cloud Bigtable instance, the operator compares the Column Families. If the Column Families are identical operator succeeds. Otherwise, the operator fails with the appropriate error message.

Using the operator¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

    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",
    )

Advanced¶

When creating a table, you can specify the optional initial_split_keys and column_families. Please refer to the Python Client for Google Cloud Bigtable documentation for Table and for Column Families.

BigtableDeleteTableOperator¶

Use the BigtableDeleteTableOperator to delete a table in Google Cloud Bigtable.

Using the operator¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

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",
)

BigtableTableReplicationCompletedSensor¶

You can create the operator with or without project id. If project id is missing it will be retrieved from the Google Cloud connection used. Both variants are shown:

Use the BigtableTableReplicationCompletedSensor to wait for the table to replicate fully.

The same arguments apply to this sensor as the BigtableCreateTableOperator.

Note: If the table or the Cloud Bigtable instance does not exist, this sensor waits for the table until timeout hits and does not raise any exception.

Using the operator¶

tests/system/providers/google/cloud/bigtable/example_bigtable.py[source]

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",
)

Reference¶

For further information, look at: