The commonest operational failure.
WHAT CONSUMES SPACE
Images, including unused ones Stopped containers Volumes no longer referenced Build cache Logs
WHY IT CREEPS UP
Each deployment pulls a new image and leaves the old.
WHAT THAT PRODUCES
A host that fills quietly over weeks.
WHAT A FULL DISK CAUSES
Containers failing to start The engine misbehaving The whole host becoming unusable
WHAT TO CHECK
Space, and what is using it.
HOW
The engine's own disk usage report.
WHAT TO CLEAN
Unused images Stopped containers Dangling build cache
WHAT TO BE EXTREMELY CAREFUL WITH
Volume pruning.
WHY
It deletes data, and unreferenced does not mean unwanted.
WHAT TO AUTOMATE
Removal of unused images older than a period.
WHAT TO CONFIGURE
Log rotation per container.
WHY
Unlimited logging is frequently the default.
WHAT TO MONITOR
Disk space, with warning well before full.
WHAT TO SEPARATE IF POSSIBLE
Container storage from the system partition.
WHY
A full system partition stops everything.
WHAT TO REVIEW
Image retention in the registry, which grows the same way.
