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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[–] possiblylinux127@lemmy.zip 5 points 1 year ago

Honestly you can do either.

LXC

  • shares host kernel (theoretically lighter weight)

  • less isolation from host (less secure)

  • devices are passed via device files

  • less flexible due to dependence on host

  • no live transfers

  • filesystem shared with host

virtualization

  • has own kernel and filesystem

  • supports live transfers

  • hardware pass though is done at the device level

  • more flexible due to independent kernel

  • more overhead