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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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[–] MangoPenguin@lemmy.blahaj.zone 2 points 1 year ago (1 children)

How do you handle backups? Install restic or whatever in every container and set it up? What about updates for the OS and docker images, watchtower on them I imagine?

It sounds like a ton of admin overhead for no real benefit to me.

[–] non_burglar@lemmy.world 2 points 1 year ago

I just snapshot the parent lxc. The data itself isn't part of the container at any level, so if I bung up compose yml or env, I can just flip it back. The only real benefit is that all my backups are in the same place in the same format.

Like I'm not actually opposed to managing docker in one unit, I just haven't got there yet and this has worked so far.

If I were to move to a single platform for several docker, what would you suggest? For admin and backups?