Proxmox root full docker overlay2 the cause?

[pcmofo]

Restarted my Nas and Proxmox boxes this morning to find things like the VM console and Docker reporting they were "out of space" confirmed the 12gb of space for the / root drive is full, appears to be mostly a 8gb Docker overlay2 file in /var/lib/docker.

All of my docker containers live on a 500gb SSD along with my containers. I don't understand why Docker has created this Overlay2 file and why it has consumed the majority of the available space and what I should do to resolve the issue.

Running 6.1 pve I haven't touched proxmox in about a year so I have no idea what's going on.

 

[pcmofo]

df -h also shows me 3 additional overlay files

overlay                           12G   12G     0 100% /var/lib/docker/overlay2/368a1481f57720531bd5f0c1d55259614dd173495c40f6d606b6fa9349ef030d/merged
overlay                           12G   12G     0 100% /var/lib/docker/overlay2/41ae233c0671a72a452eecf8dc258c19285a50a3d01c9a68ebc8ce0baee58c05/merged
overlay                           12G   12G     0 100% /var/lib/docker/overlay2/aa71c82236d2b4362577da3c1f009fe5ffe6ac1aba9edb8e815ffe5ad3f37ca1/merged