Portable liveness/readiness checks

[rchl-u]

I've configured process compose on Mac which worked quite well but then when trying to get the same setup working on Windows I've realized that the command used for checking liveness is likely not portable.

For example I have

    liveness_probe:
      exec:
        command: '[ $(docker inspect -f "{{.State.Running}}" dozzle) = true ]'

to check whether docker container is running.

On windows the process is never considered ready.

How would you recommend handling issues like that? I would like the command to be portable so that it works on both (all?) operating systems. Is the only way to wrap it in some other script? For example run in through node (my project is node-based)?

[F1bonacc1]

Hi @rchl-u,

Glad you find PC useful.

I think the easiest approach would be to have 2 configuration files: compose.yaml and compose.win.yaml, only with overrides.

And then start them with:

process-compose -f compose.yaml -f compose.win.yaml

To simplify that even further you can use the extends notation:

# ./some/dir/compose.yaml

processes:
  proc1:
    liveness_probe:
      exec:
        command: '[ $(docker inspect -f "{{.State.Running}}" dozzle) = true ]'

# ./some/dir/compose.win.yaml
extends: "compose.yaml"

processes:
  proc1:
    liveness_probe:
      exec:
        command: <the Windows version of your command>

And start it with:

process-compose -f compose.win.yaml

More info here: https://f1bonacc1.github.io/process-compose/merge/#configuration-inheritance-with-extends