this post was submitted on 20 Feb 2025
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Docker in LXC vs VM (lemmy.ml)
submitted 1 year ago by mr_jaaay@lemmy.ml to c/selfhosted@lemmy.world
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I run a small server with Proxmox, and I'm wondering what are your opinions on running Docker in separate LXC containers vs. running a specific VM for all Docker containers?

I started with LXC containers because I was more familiar with installing services the classic Linux way. I later added a VM specifically for running Docker containers. I'm thinking if I should continue this strategy and just add some more resources to the docker VM.

On one hand, backups seem to be easier with individual LXCs (I've had situations where I tried to update a Docker container but the new container broke the existing configuration and found it easiest just to restore the entire VM from backup). On the otherhand, it seems like more overhead to install Docker in each individual LXC.

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[–] DarkDarkHouse@lemmy.sdf.org 1 points 1 year ago* (last edited 1 year ago)
  1. I’m backing up LXCs, like I’d back up a VM. I don’t back up Docker containers, just their config and volumes.
  2. I don’t think anyone is doing that. We’re talking about installing Docker in LXC. One of the Proxmox rules you can live by is to not install software on the host. I don’t see the problem with installing Docker in an LXC for that reason.
  3. I’ll snapshot an LXC before running things like a dist-upgrade, or testing something that might break things. It’s very easy, so why not?
  4. I back up my LXC that has Docker installed because that way it’s easy to restore everything, including local volumes, to various points in time.