Support sending signals on file change

[discordianfish]

Since Kubernetes 1.11 it's possible to share the IPC namespace, allowing to send signals between containers.
Since many services reload their config on a signal, e.g SIGHUP, it would make sense to add this to the configmap-reloader.

Specifically I like to reload fluentd on configmap change.

[gofman8]

+1

[jimmidyson]

Great idea. Any thoughts on what flags would look like and how to figure out what process to send signal to?

[andrewhowdencom]

to the question specifically I would probably expect something like:

./bin pgrep 'nginx'

Or something. Bonus points - allow re-implementing pgrep semantics -- --user et. al.

Note: This is a substantial amount of work; this may have poor ROI.

[zgfh]

should we copy this ? https://github.com/lvelvis/nginx-config-reload

[marcbachmann]

I wrote my own script that supports custom shell scripts and therefore also signals.
It uses md5-based file comparison to detect changes on files:
https://hub.docker.com/r/livingdocs/file-change-hook

It's not really a solution for this tool, but it might help some people.

[AkaiNoCat]

1

[sinacek]

Is there any change, that will be implement this year?