Part of collection: Hyper-converged Homelab with Proxmox
After struggling for some days, and since I really needed this to work (ignoring the it can't be done vibe everywhere), I managed to get Docker to work reliable in privileged Debian 12 LXC Containers on Proxmox 8
(Unfortunately, I couldn't get anything to work in unprivileged LXC Containers)
There are NO modifications required on the Proxmox host or the /etc/pve/lxc/xxx.conf file; everything is done on the Docker Swarm host. So the only obvious candidate who could break this setup, are future Docker Engine updates!