[GitHub] [airflow] CodingJonas edited a comment on pull request #8617: Extend docker swarm operator configuration

[GitBox <gi...@apache.org>]

CodingJonas edited a comment on pull request #8617:
URL: https://github.com/apache/airflow/pull/8617#issuecomment-642002414


   @nullhack I have no dedicated test dag as I didn't use a dedicated test environment (I copied the code changes from a different, existing environment), but this should work:
   
   ### Start docker swarm with network and config
   ```bash
   docker swarm init
   docker network create -d overlay --attachable private-network
   echo "example config content" | docker config create the-config -
   
   # This service does nothing but exist to be pinged at
   docker service create -d --replicas 1 --network=private-network --name server_ping_me          alpine tail -f /dev/null
   ```
   ### Example DAG
   The task in the DAG should be able to successfully ping the other service.
   ```python
   dag_params = dict(
       dag_id='full_docker_swarm_test',
       schedule_interval=None,
       start_date=datetime(2020, 3, 20),
       catchup=False,
   )
   
   with DAG(**dag_params) as dag:
       task = DockerSwarmOperator(
           task_id='ping_inside_server',
           image='alpine',
           api_version='auto',
           networks=['private-network'],
           configs=[{'source': 'the-config', 'target': 'the-config'}],
           command='ping -c 4 server_ping_me',
           tty=True,
       )
   
       task
   ```
   I haven't tested the example script in this comment.


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