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rootless podman ftw.
Damn straight. Yes, docker has rootless now, although I rarely see it in the wild (as I'm converting it to rootless podman), no one seems to care or know. I was using user level quadlets (really like the syntax and structure) before that, and you get SELinux as well. Everything that doesn't really need it should not have root, pretty much the basic level of Linux (back to Unix) security and Docker is like, 'Don't Care, Got Root ;)'.
principle of least privilege
That's the one.
I've been converting my entire docker stack to rootless. You run into a number of issues where certain applications simply cannot handle having that limited access, especially on smaller or more niche projects. The documentation doesn't offer solutions so you are just shit out of luck unless you can troubleshoot it.
I've tried setting up rootless podman on my machine but I just could not get it to work for some reason. It's been a while so I unfortunately don't remember the error message but I think it had something to do with the docker socket being unavailable or podman not having the permission to access it.