从终端触发气流 DAG 不起作用

Question

I'm trying to use airflow to define a specific workflow that I want to manually trigger from the command line.

I create the DAG and add a bunch of tasks.

dag = airflow.DAG(
    "DAG_NAME",
    start_date=datetime(2015, 1, 1),
    schedule_interval=None,
    default_args=args)

I then run in the terminal

airflow trigger_dag DAG_NAME

and nothing happens. The scheduler is running in another thread. Any direction is much appreciated. Thank You

Answer 1

I just encountered the same issue.

Assuming you are able to see your dag in airflow list_dags or via the web server then:

Not only did I have to turn on the dag in the web UI, but I also had to ensure that airflow scheduler was running as a separate process.

Once I had the scheduler running I was able to successfully execute my dag using airflow trigger_dag <dag_id>

My dag configuration is not significantly different from yours. I also have schedule_interval=None

Answer 2

You may have disabled the workflow. To enable the workflow manually. Open up the airflow web server by

$ airflow webserver -p 8080

Go to http://localhost:8080 . You should see the list of all available dags with a toggle button on/off. By default everything is set to off. Search for your dag and toggle your workflow. Now try triggering the workflow from terminal. It should work now.

Answer 3

first make sure your database connection string on the airflow is working, weather it be on postgres, sqlite(by default) or any other database. Then run the command

 airflow initdb

This command should not be showing any connection errors

Secondly make sure your webserver is running on a separate thread

airflow webserver

Then run your schdeuler on a different thread

airflow scheduler

Finally trigger your dag on a different thread after the scheduler is running

airflow trigger_dag dag_id

Also make sure the dag name and task are present in the dag and task list

airflow list_dags
airflow list_tasks dag_id

And if the dag is switched off in your UI then toggle it on.

Answer 4

You should 'unpause' the drag you what to trigger. use airflow unpause xxx_drag and then airflow trigger_dag xxx_drag and it should work.

Answer 5

气流 trigger_dag -e <execution_date> <dag_id>