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.
Dockers ‘take-over-system’ style of network management will interfere with proxmox networking.
Well, I don’t use proxmox, however docker coexists with libvirt and other virtualization systems. If there are overlapping networks that docker ant proxmox attempt to manage, they are configurable.
I don’t use proxmox, but it works absolutely fine for me on my regular Linux system, which has a firewall, some background services, etc. Could you be more specific on the issues you’re running into?
Also, I only really expose two services on my host:
Everything else just connects through an internal-only docker network.
If you’re getting conflicts, I’m guessing you’ve configured things oddly, because by default, docker creates its own virtual interface to explicitly not interfere with anything else on the host.