docker clean up container overhead

Question

I have two docker containers running, where the diskspace is as follows:

user$ sudo docker system df
TYPE                TOTAL               ACTIVE              SIZE                RECLAIMABLE
Images              2                   1                   448.3MB             1.84kB (0%)
Containers          2                   2                   284.4MB             0B (0%)
Local Volumes       7                   2                   418.8kB             176.4kB (42%)
Build Cache         0                   0                   0B                  0B

If I check diskusage I get:

root:/var/lib/docker# du -ah --max-depth=1
45G     ./containers

What can I do to keep the containers (since I made a lot of configuration) but remove the obvious overhead?

I found that the space-consuming file is -json.log. Can I remove the file? — Michael Hecht, Mar 29 '20 at 18:03

nischay goyal · Answer 1 · 2020-03-29T20:23:01.203

0

Please run the below command the clean the system as

This will remove:
- all stopped containers
- all networks not used by at least one container
- all dangling images
- all dangling build cache

docker system prune -f

And yes, you can remove the son file as well.

edited Mar 29 '20 at 20:23

answered Mar 29 '20 at 18:30

nischay goyal

3,206
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I just have the two containers which I want to keep definitely. My problem seems to be the unrestricted size of logfile. – Michael Hecht Mar 29 '20 at 19:52
When you run `docker system prune -f`, it will not remove the running containers or images and yes you can delete the logs file as well. – nischay goyal Mar 29 '20 at 20:22

score 0 · Answer 2 · answered Mar 29 '20 at 21:10

You can use docker system prune -f, but, from my experience, it is not cleaning all that can be cleaned up.

For that, I've created a simple Docker image that does all the needed cleaning using only one command:

docker run -v /var/run/docker.sock:/var/run/docker.sock tikalci/tci-docker-cleanup:latest

For more details, see: https://github.com/TikalCI/tci-docker-cleanup

docker clean up container overhead

2 Answers2