Docker

Fix Docker overlayfs does not support file handles on ZFS

5 August 2026
This error appears on your Proxmox host logs because Docker is trying to use the native overlay2 storage engine inside an LXC container that sits on a storage layer that doesn't fully support Linux kernel file handles for overlay mapping.
Proxmox + Alpine + Docker

Install Docker on Alpine in Proxmox

27 February 2026
Compared to Debian or Ubuntu container images, Alpine Linux uses one-tenth the space and 60% less RAM. It has minimal packages installed by default which minimizes the attack surface. That makes Alpine an ideal OS for both a Docker host and simple containers. Installing Docker in an Alpine Linux container on Proxmox is really as simple as running a few commands.
Docker