I have a VM on which I have been running (for a long time) a docker-compose stack.

Suddenly I started getting notifications about low disk space on my machine.

I noticed the following 2 directories occupying a disproportionally large amount of space

/var/lib/docker/containers

and

/var/lib/docker/overlay2

What is the type of information held there and how can I avoid the problem of disk depletion in the future consistently?

CodePudding user response：

Docker save data for images and logs

For cleaning unused images and containers you can use the command docker system prune maybe with -a --volume options

For logs you can view response in this answer

Truncate logs

echo "" > $(docker inspect --format='{{.LogPath}}' <container_name_or_id>)

Setup logs rotation in /etc/docker/daemon.json

{
  "log-driver": "json-file",
  "log-opts": {"max-size": "10m", "max-file": "3"}
}