We have warnings in Icinga, when disk space hits 80%

We have:

$ df -h
Filesystem      Size  Used Avail Use% Mounted on
...
/dev/nvme1n1p5  196G   22G  164G  12% /var
/dev/nvme1n1p6  512G  350G  137G  72% /data
...

Where /data is used for Docker, and /var has Docker Builder cache.

Docker usage can be checked with:

docker system df

We could set up some cron to clean up unused Docker resources.