[Feature] Docker Healthcheck / Health API endpoint

[saschabrockel]

Is your feature request related to a problem? Please describe. I would like to know if the container is in a healthy state or if it is not responding anymore for example and can also automatically react to unhealthy states.

Describe the solution you'd like It would be nice if either the Dockerfile would already include a Docker healthcheck like

HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
  CMD curl -f http://localhost:8080/health || exit 1

It does not need to be curl. I can also be wget which is available already.

HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
  CMD wget -nv -t1 --spider http://localhost:8080 || exit 1

Describe alternatives you've considered Otherwise, at least create an API endpoint like /health which just returns status code 200 and we know the container is in a working state.

Currently, you can create a Docker healthcheck on http://localhost:8080 which is overload with wget.

[gantoine]

You can use /api/heartbeat to see if the app is up and running correctly, it'll return a 200 status code and a bunch of config properties in JSON format.

[saschabrockel]

Thank you @gantoine worth to note it somewhere in the docs :)