So, I’ve finally gotten a comfortable setup for my beautiful podman quadlets, its a simple debian system, heavily systemd reliant, and I’m curious about how yall admin such a thing, I’ve got a couple of scripts to create users, skel the home directories, and templates for services.
I’m particularly curious about handling subids, I’m pretty careful about them and not using too too many, mostly for being afraid of running out of them lol. But from what I’ve seen, linux allows you to go real stupid with it, like having a shitton of range and entrances.
I personally give my quad users like 500 subids to work with and they generally work fine, it really depends on if I’m gonna have more than one service running on them or not.
Are you using one (system) user per quadlet? (Why?) Each of my quadlets is owned by the same (non-root) user and the containers are rootless. In that case, podman deals with (sub)id-allocation. selinux-labels take care of volume scopes and podman networks are as isolated as possible. Seems enough for me; never even considered using different users in that case.
Never delved into SELinux, honestly afraid (lazy) of navigating getting into yet another rabbit hole, but from the rest of the answers here, letting podman deal with isolation sounds like a better solution. tysm for ur input :)