Add an healthcheck to server container

[6543]

like the agent:

woodpecker/docker/Dockerfile.agent.multiarch

Line 21 in 205f8ec

HEALTHCHECK CMD ["/bin/woodpecker-agent", "ping"]

ref https://docs.docker.com/engine/reference/builder/#healthcheck

TODO:

• add subcommand to server that can test against

  woodpecker/server/router/router.go

  Line 69 in 205f8ec

  e.GET("/healthz", api.Health)

• use subcommand in container

[lonix1]

Background info:

• Option 1 is to burn it into the image:
  Dockerfile :

  HEALTHCHECK CMD # ...
  

• Option 2 is to call API endpoint (which already exists at /api/healthz but is currently faulty) from compose:
  docker-compose.yml:

  healthcheck:
    start_period: 5s
    interval: 30s
    timeout: 10s
    retries: 3
    test: 'wget --no-verbose --tries=1 --spider http://localhost:8000/api/healthz || exit 1'

[6543]

Yes but we cant use wget and need a build in func for tje from-scratch container

[lonix1]

next-45319b24cd-alpine is based on alpine which has wget (busybox implementation). Are you going to swap to scratch?

[6543]

but next-45319b24cd is not ... and so if we officially want to support it ... we have to do it that way

[lafriks]

The best option would be to add a command line option that would call the health check endpoint and return the exit code based on response

[6543]

That's exactly whatvi try to write 😅