Homelab, Linux, JS & ABAP (~˘▾˘)~

[Proxmox] Upgrade 7.4 to 8.0 – Failed to run lxc.hook.pre-start for container

After updating my Proxmox Server to PVE8.0, suddenly two lxc containers did not start anymore.

root@pve:~# pct start 192
run_buffer: 322 Script exited with status 2
lxc_init: 844 Failed to run lxc.hook.pre-start for container "192"
__lxc_start: 2027 Failed to initialize container "192"
startup for container '192' failed

I tried to view the error.log but couldn’t find any helpful information.

lxc-start -lDEBUG -o error.log -F -n 192

When googling, I stumbled across this reddit post. Although the issue was a bit different, I tried the recommended steps. The first command, directly led me to the right direction…

root@pve:~# pct mount 192
mounting container failed
directory '/mnt/nfs/data/folder' does not exist

For whatever reason, after restarting proxmox it did not mount the nfs shares properly on the host. And of course, after this hint, I noticed that both containers were trying to mount some of these folders, which were actually nfs shares from my NAS. A simple mount -a on the host fixed it immediately. Besides of this little problem, everything went well with the proxmox upgrade!