Add suppport for linkerd

[uwebartels]

Checks

• [X] I have checked for existing issues.
• [X] This report is about the User-Community Airflow Helm Chart.

Motivation

I need to integrate our airflow installation with linkerd2 for getting inter-pod communication encrypted.

Implementation

I see that many pods use an init container wait-for-airflow-migrations. This is doing a postgres call. as postgres is not supported by linkerd as it is not http protocol, the init container is failing with this error: sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) connection to server at "airflow-pgbouncer.dev" (172.20.65.252), port 6543 failed: Connection refused

If the init container could do an http call to check for airflow-migration I think it would solve the error popping up.

Best... Uwe

Are you willing & able to help?

• [ ] I am able to submit a PR!
• [ ] I can help test the feature!

[stale[bot]]

This issue has been automatically marked as stale because it has not had activity in 60 days. It will be closed in 7 days if no further activity occurs.

Thank you for your contributions.

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Issues never become stale if any of the following is true:

1. they are added to a Project
2. they are added to a Milestone
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[thesuperzapper]

@uwebartels have you solved your issue?

If not, can you give more details?

[stale[bot]]

This issue has been automatically marked as stale because it has not had activity in 60 days. It will be closed in 7 days if no further activity occurs.

Thank you for your contributions.

---

Issues never become stale if any of the following is true:

1. they are added to a Project
2. they are added to a Milestone
3. they have the lifecycle/frozen label