If we have problems with the space that Docker occupies, we can do the following to free up the space used:
These logs grow unchecked and can free up dozens of GB without losing anything important.
Ejecuta:
sudo find /var/lib/docker/containers/ -type f -name "*-json.log" -delete
This will delete all container logs (you should do it).
Then check the space:
df -h
<
p You probably will recover several GB.
<
p Once you have some space, run:
docker system prune -a --volumes
y when asked.
This deletes everything that is not in use (idle containers, old images, orphaned volumes).
If you need to keep some containers, you can clean by parts:
docker container prune docker image prune -a docker volume prune docker builder prune
Check how much space you’ve reclaimed
Run:
sudo du -h --max-depth=1 /var/lib/docker | sort -hr | head -20 df -h
You should see something like /var/lib/docker going from 59 GB down to 2–5 GB.
You can limit the size of logs in the future by editing /etc/docker/daemon.json:
sudo nano /etc/docker/daemon.json
You can add this:
{ "log-driver": "json-file", "log-opts": { "max-size": "10m", "max-file": "3" } }
Then restart Docker:
sudo systemctl restart docker
