this post was submitted on 05 Feb 2025
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I am not the person to be asking, I am no docker expert. It's is my understanding depends_on: defines starting order. Once a service is started, it's started. If it has an internal check for "healthy" I believe watchtower will restart unhealthy containers.
This is blind leading the blind though, I would check the documentation if using watchtower. We should both go read the "depends on" documents as we both use it.
Strangely it sounds like that's correct. I was under the understanding that depends_on cared about it past start as well but it does not. It doesn't look like there's a native way of turning containers that are depending on one another when you turn the dependency off. It looks like the current recommended way of doing it is either with a Docker compose file (which doesn't help if the process crashed/was concidered unhealthy), or having a third party script on the host monitor the dependencies and if one is considered offline, it turns the dependees off.
Looking into it the concern has been approached twice now on the GitHub page, however every time that it's been brought up it's been closed for stale because nobody ever replies to the question
That was my conclusion as well, however I am at work and it's not appropriate to be reading docker documentation. Thank you for the write up.