"Hello, the drive of your XYZ server is getting full, would it be possible to prune some of the unused and/or old docker images and layers there please? Alternatively, we can offer to replace the drives with a higher capacity models for FOO extra per month"

"Hello, the disk use keeps growing and has reached the 95% mark, please prune some of your images to make space for new. If you wanted to choose the alternate option of disk capacity increase, we would have to do that as soon as possible, otherwise you may run out of space before the RAID array rebuilds"

"Hello, your server XYZ has completely ran out of disk space. Any changes that would require data being saved on disk may and probably will fail. Please free some space as soon as possible"

Ugh, I hate clients that just don't cooperate until shit hits the fan...

And no, we could not prune the space ourselves, its not our data to delete whenever we think it necessary.

We merely manage the machine's operation, keeping it online and its services running.