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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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it's not always sunny with podman (lemmy.ml)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

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I am moving from docker to podman and selinux because I thought that podman is more secure and hence, the future. I thought the transition will be somewhat seamless. I even prepaired containers but once I migrated I still ran into issues.

minor issue: it's podman-compose instead of podman compose. The hyphen feels like a step back because we moved from docker-compose to docker compose. But thT's not a real issue.

podman does not autostart containers after boot. You have to manually start them, or write a start script. Or create a systemd unit for each of them.

Spinning up fresh services works most of the time but using old services that worked great with docker are a pain. I am wasting minutes after minutes because I struggle with permissions and other weird issues.

podman can't use lower number ports such that you have to map the ports outside of the machine and forward them properly.

Documentation and tutorials are "all" for docker. Github issues are "all" for docker. There isn't a lot of information floating around.

I'm still not done and I really wonder why I should move forward and not go back to docker. Painful experience so far. https://linuxhandbook.com/docker-vs-podman/ and following pages helped me a lot to get rid of my frustration with podman.

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[–] [email protected] 28 points 8 months ago (2 children)

Podman is purposefully built to rely on systemd for running containers at startup. It ties in with the daemonless and rootless conventions. It's also nice because systemd is already highly integrated with the rest of the OS, so doing things like making a container start up after a drive is mounted is trivial.

Podman has a command to generate systemd files for your containers, which you can then use immediately or make some minor tweaks to your liking.

I use podman for my homelab and enjoy it. I like the extra security and that it relies on standard linux systems like systemd and user permissions. It forces me to learn more about linux and things that apply to more than just podman. You can avoid a lot of trouble by running the containers as root and using network=host, but that takes away security and the fun of learning.

[–] [email protected] 5 points 8 months ago

Ooh I didn't know about the systemd integration, that actually sounds like a really smart approach.

To be honest, until right now I'd pretty much written off podman as docker 2

[–] [email protected] 3 points 8 months ago

You can avoid a lot of trouble by running the containers as root and using network=host

Root yes, but you can avoid network=host most of the time pretty easily. I am still struggling with going rootless myself tbh.