this post was submitted on 15 Nov 2024
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I’m moving to a new machine soon and want to re-evaluate some security practices while I’m doing it. My current server is debian with all apps containerized in docker with root. I’d like to harden some stuff, especially vaultwarden but I’m concerned about transitioning to podman while using complex docker setups like nextcloud-aio. Do you have experience hardening your containers by switching? Is it worth it? How long is a piece of string?

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[–] oranki@piefed.social 10 points 2 days ago (10 children)

I'm very much biased towards Podman, but from what I understand rootless Docker is a bit of an afterthought, while Podman has been developed from the ground up with rootless in mind. That should be reason enough.

The very few things Docker can do that Podman struggles a bit with are stuff that usually involves mounting the Docker socket in the container or other stupid things. Since you care about security, you wouldn't do that anyway. Not to mention there's also rootful Podman, when you need that level of access.

I'd recommend an RPM-based distro with Podman, the few times I've tried Podman on a deb distro, there's always been something wonky. It's been a while, though.

[–] matcha_addict@lemy.lol 2 points 2 days ago (2 children)

Does Podman work well when you have multiple rootless containers that you want to communicate securely in a least-privilege configuration (each container only has access to what it needs)? That is the one thing I couldn't figure out how to do well with Podman.

[–] cmgvd3lw@discuss.tchncs.de 1 points 1 day ago* (last edited 1 day ago)

Yes, you can easily do that. Set the container name and make them on the same network. Used caddy and whole bunch of Selfhostable services with it and I reverse proxy as

container_name:port
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