Airflow health API is returning always 200

Apache Airflow version

2.2.4

What happened

The health endpoint of airflow (base_url/health) is always returning 200 in all the scenarios (healthy+unhealthy).

Same information is mentioned here that

Please keep in mind that the HTTP response code of /health endpoint should not be used to determine the health status of the application. The return code is only indicative of the state of the rest call (200 for success).

Scenario-1: (Scheduler and Metadatabase are healthy) - Status Code = 200

{
  "metadatabase": {
   "status": "healthy"
  },
  "scheduler": {
   "latest_scheduler_heartbeat": "2022-04-07T13:13:41.102804+00:00",
   "status": "healthy"
  }
}

Scenario-2: (Scheduler is unhealthy) - Status Code = 200

{
  "metadatabase": {
   "status": "healthy"
  },
  "scheduler": {
   "latest_scheduler_heartbeat": "2022-04-07T13:13:41.102804+00:00",
   "status": "unhealthy"
  }
}

The only way to get unhealthy information is by parsing the JSON response.

What you think should happen instead

The status code of scenario-2 (Something is unhealthy) should return a status code other than 200.

How to reproduce

Install airflow and hit the URL base_url/health

Operating System

Linux

Versions of Apache Airflow Providers

No response

Deployment

Docker-Compose

Deployment details

No response

Anything else

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

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

[mik-laj]

I agree. We can add separate health checks for other components that will be independent of the webserver.

[michaelmicheal]

Feel free to assign this to me, I can start by adding a healthcheck endpoint to the scheduler