Mounting DAGs

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: cm-dag (1)
data:
  test_airflow_dag.py: | (2)
    from datetime import datetime, timedelta
    from airflow import DAG
    from airflow.operators.bash import BashOperator
    from airflow.operators.dummy import DummyOperator

    with DAG(
        dag_id='test_airflow_dag',
        schedule_interval='0 0 * * *',
        start_date=datetime(2021, 1, 1),
        catchup=False,
        dagrun_timeout=timedelta(minutes=60),
        tags=['example', 'example2'],
        params={"example_key": "example_value"},
    ) as dag:
        run_this_last = DummyOperator(
            task_id='run_this_last',
        )

        # [START howto_operator_bash]
        run_this = BashOperator(
            task_id='run_after_loop',
            bash_command='echo 1',
        )
        # [END howto_operator_bash]

        run_this >> run_this_last

        for i in range(3):
            task = BashOperator(
                task_id='runme_' + str(i),
                bash_command='echo "{{ task_instance_key_str }}" && sleep 1',
            )
            task >> run_this

        # [START howto_operator_bash_template]
        also_run_this = BashOperator(
            task_id='also_run_this',
            bash_command='echo "run_id={{ run_id }} | dag_run={{ dag_run }}"',
        )
        # [END howto_operator_bash_template]
        also_run_this >> run_this_last

    # [START howto_operator_bash_skip]
    this_will_skip = BashOperator(
        task_id='this_will_skip',
        bash_command='echo "hello world"; exit 99;',
        dag=dag,
    )
    # [END howto_operator_bash_skip]
    this_will_skip >> run_this_last

    if __name__ == "__main__":
        dag.cli()

---
apiVersion: airflow.stackable.tech/v1alpha1
kind: AirflowCluster
metadata:
  name: airflow
spec:
  image:
    productVersion: 2.8.1
  clusterConfig:
    loadExamples: false
    exposeConfig: false
    credentialsSecret: simple-airflow-credentials
    volumes:
      - name: cm-dag (3)
        configMap:
          name: cm-dag (4)
    volumeMounts:
      - name: cm-dag (5)
        mountPath: /dags/test_airflow_dag.py (6)
        subPath: test_airflow_dag.py (7)
  webservers:
    roleGroups:
      default:
        envOverrides:
          AIRFLOW__CORE__DAGS_FOLDER: "/dags" (8)
        replicas: 1
  celeryExecutors:
    roleGroups:
      default:
        envOverrides:
          AIRFLOW__CORE__DAGS_FOLDER: "/dags" (8)
        replicas: 2
  schedulers:
    roleGroups:
      default:
        envOverrides:
          AIRFLOW__CORE__DAGS_FOLDER: "/dags" (8)
        replicas: 1