Add global callbacks for all dags

[yupbank]

Description

I find it's useful to add global on_success and on_failure callbacks for all dags. and not being able to find a way to do that.

Use case/motivation

example, some kind of plugin can allow user to setup some callback for all existing DAGS without the need to updating them

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[arjunanan6]

A feature like this would be great. What we've done for now is to add our re-usable modules (such as on_success or on_failure callbacks) as plugins and simply import them into our DAGs. Granted, you still need to import it for each DAG, but it makes the effort a little easier.

[hussein-awala]

You can use Airflow Listeners to create TIs/DAG runs lifecycle notifications, and they are applied on all the dags.
https://airflow.apache.org/docs/apache-airflow/stable/administration-and-deployment/listeners.html