Airflow API for 'airflow dags reserialize'

[BenjaminYong]

Description

An Airflow API endpoint to programatically reserialize dags, aligned with the airflow dags reserialize CLI command:
https://airflow.apache.org/docs/apache-airflow/stable/cli-and-env-variables-ref.html#reserialize

Use case/motivation

Currently, I must exec into my Airflow webserver in order to run the CLI command to refresh dags.

However, I already have an Airflow client programatically communicating to the Airflow webserver API. It would be great to be able to request the API to refresh dags when required.

As a temporary solution, I have set a low interval of 1s for:

• min_serialized_dag_update_interval
• min_serialized_dag_fetch_interval

But have found high constant resource usage as a result to the Airflow services.

Related issues

An extension of #19432

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

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template! If you are willing to raise PR to address this issue please do so, no need to wait for approval.

[shubham-pyc]

If this needs a fix i can work on this.

[karenbraganz]

@shubham-pyc I have assigned this to you.

[potiuk]

@shubham-pyc We are unassigning you from this issue as part of our updated assignment policy.

This is not meant to discourage your contribution — quite the opposite! You are still very welcome to work on this issue and submit a PR for it. Simply comment that you are working on it and open a PR when ready.

We found that formal assignments were not working well, as they often prevented others from contributing when the assignee was not actively working on the issue.