Only watch

[TheDogHusky]

Hey!

I wanted to have a system in docker that simply executes a command when there are any container changes.
The only thing I've found for now is docker-gen, but I don't wanna generate templates or anything, just execute a command on container changes.

Is there a way to use docker-gen's watch to just execute a command and not do what it is intended to be used for ?

Sorry if this post is dumb.

Regards,
Adam

[TheDogHusky]

Update on this, I made my own tool called docker-watch (no idea if someone did this already).
I'm planning on making this a cli tool and dockerized tool for people to use and execute command on certain docker events.

[buchdag]

Hi Adam

To answer your original question : currently docker-gen indeed can't be used without generating at the very least an empty or minimal template to the standard out, ie

$ docker-gen
Usage: docker-gen [options] template [dest]

• if [dest] is omitted, docker-gen will output the rendered result to the standard out instead of a file.
• if your template file contains nothing, docker-gen should only output a blank line each time it's triggered.
• but docker-gen still require that you pass a template file path at invocation nevertheless.