this post was submitted on 15 Jul 2025
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Hi all !

As of today, I am running my services with rootless podman pods and containers. Each functional stack gets its dedicated user (user cloud runs a pod with nextcloud-fpm, nginx, postgresql...) with user mapping. Now, my thought were that if an attack can escape a container, it should be contained to a specific user.

Is it really meaningful ? With service users' home setup in /var/lib, it makes a lot of small stuff annoying and I wonder if the current setup is really worth it ?

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[–] jlh@lemmy.jlh.name 0 points 2 weeks ago (3 children)

It's not going to make a meaningful difference in your threat model and it will cause a lot of hassle for extra configuration and broken docker images, so I wouldn't bother.

There is some nice tooling for transparent user name spaces coming down the pipeline in Kubernetes which will be a nice 0-effort security upgrade, but if you don't have the tooling, I would say it's not worth it.

https://kubernetes.io/docs/concepts/workloads/pods/user-namespaces/

[–] Mubelotix@jlai.lu 1 points 2 weeks ago

Unfortunately it's right that containers break. Mastodon for instance will not run under a non priviledged user

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