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Docker in LXC vs VM
(lemmy.ml)
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this post was submitted on 20 Feb 2025
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Regardless of VM or LXC, I would only install docker once. There's generally no need to create multiple docker VMs/LXCs on the same host. Unless you have a specific reason; like isolating outside traffic by creating a docker setup for only public services.
Backups are the same with VM or LXC on Proxmox.
The main advantages of LXC that I can think of:
I use individual lxc for each docker compose so I don't have to revert 8 services at once if I need to restore.
I would also argue that an alpine lxc runs in 22mb ram by itself ... Significantly smaller footprint on disk and in memory. But most importantly, lxc can actually share memory space effectively, one doesn't need to reserve blocks of ram.
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.
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?