Docker Image / Container Cleaning

Sun, 25 Aug 2019 00:00:00 +0000

Unused Docker image and container can quickly take up your disk spaces.

Let’s check disk usage

Summary of data used. You can add -v flag for detailed info.

$ docker system df
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 87 1 63.39GB 63.17GB (99%)
Containers 1 0 0B 0B
Local Volumes 69 1 2.732GB 2.683GB (98%)
Build Cache 0 0 0B 0B

Remove unused data

The following command will remove:

all stopped containers
all networks not used by at least one container
all dangling images (see below fo dangling images)
all build cache By default, volumes are not removed to prevent important data from being deleted.

$ docker system prune
WARNING! This will remove:
 - all stopped containers
 - all networks not used by at least one container
 - all dangling images
 - all dangling build cache

Are you sure you want to continue? [y/N] y
Deleted Containers:
...
Total reclaimed space: 13.91GB

Options:

Docker on the art of simplicity

Docker Image / Container Cleaning

Let’s check disk usage

Remove unused data