Can we configure restart_on for a process?

[shivaraj-bh]

restart_on can define a condition/s under which a process has to be restarted.

Use case:
If there are two dependent processes A and B, where B depends_on A. I would like B to also restart when A does.

I don’t see any straightforward way to configure this for now, is this worth exploring as a new feature?

[F1bonacc1]

Hey @shivaraj-bh,

Can you elaborate a bit more on the reason for A's restart?

I asking because I am considering if something like liveness probe can help here.

[shivaraj-bh]

Yes, I should’ve added more details.

Let’s say A is a process that builds a package, while B is used to run it. B depends on A being successfully completed and B also has readiness_probe configured. In a local development scenario, I would want B to automatically restart (based on a configured policy) when I restart A.

Note: I can’t just do build and run in the same process because then the readiness_probe will close the process after failure_threshold, leading to the process terminating if the build isn’t complete yet.

[F1bonacc1]

That clears things up.
Another question - how do you restart A? Do you do it manually? Externally or through Process Compose?
Is it possible to add another process to PC, let's call it "restarter" that will call process-compose process restart A && process-compose process restart B?

[shivaraj-bh]

Is it possible to add another process to PC, let's call it "restarter" that will call process-compose process restart A && process-compose process restart B

Right, that should do the job. Thank you!

[gedw99]

I also need this.

adding a restarted that’s controlled via rpc will do it .

It will need to know what’s running and the version of each , so it can check , then restart the binary in question.