Source code for tests.system.providers.google.cloud.dataproc.example_dataproc_presto

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"""
Example Airflow DAG for DataprocSubmitJobOperator with presto job.
"""
from __future__ import annotations

import os
from datetime import datetime

from airflow import models
from airflow.providers.google.cloud.operators.dataproc import (
    DataprocCreateClusterOperator,
    DataprocDeleteClusterOperator,
    DataprocSubmitJobOperator,
)
from airflow.utils.trigger_rule import TriggerRule

[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]DAG_ID = "dataproc_presto"
[docs]PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT")

[docs]CLUSTER_NAME = f"cluster-{ENV_ID}-{DAG_ID}".replace("_", "-")
[docs]REGION = "europe-west1"

# Cluster definition
# [START how_to_cloud_dataproc_create_cluster]
[docs]CLUSTER_CONFIG = {
    "master_config": {
        "num_instances": 1,
        "machine_type_uri": "n1-standard-4",
        "disk_config": {"boot_disk_type": "pd-standard", "boot_disk_size_gb": 32},
    },
    "worker_config": {
        "num_instances": 2,
        "machine_type_uri": "n1-standard-4",
        "disk_config": {"boot_disk_type": "pd-standard", "boot_disk_size_gb": 32},
    },
    "software_config": {
        "optional_components": [
            "PRESTO",
        ],
        "image_version": "2.0",
    },
}
# [END how_to_cloud_dataproc_create_cluster]

# Jobs definitions
# [START how_to_cloud_dataproc_presto_config]
[docs]PRESTO_JOB = {
    "reference": {"project_id": PROJECT_ID},
    "placement": {"cluster_name": CLUSTER_NAME},
    "presto_job": {"query_list": {"queries": ["SHOW CATALOGS"]}},
}
# [END how_to_cloud_dataproc_presto_config]


with models.DAG(
    DAG_ID,
    schedule="@once",
    start_date=datetime(2021, 1, 1),
    catchup=False,
    tags=["example", "dataproc", "presto"],
) as dag:
[docs]    create_cluster = DataprocCreateClusterOperator(
        task_id="create_cluster",
        project_id=PROJECT_ID,
        cluster_config=CLUSTER_CONFIG,
        region=REGION,
        cluster_name=CLUSTER_NAME,
    )

    presto_task = DataprocSubmitJobOperator(
        task_id="presto_task", job=PRESTO_JOB, region=REGION, project_id=PROJECT_ID
    )

    delete_cluster = DataprocDeleteClusterOperator(
        task_id="delete_cluster",
        project_id=PROJECT_ID,
        cluster_name=CLUSTER_NAME,
        region=REGION,
        trigger_rule=TriggerRule.ALL_DONE,
    )

    (
        # TEST SETUP
        create_cluster
        # TEST BODY
        >> presto_task
        # TEST TEARDOWN
        >> delete_cluster
    )

    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)