Executes docker $type prune command to allow automatic cleanup on docker nodes. This is simular to docker-system-prune, but allows more control of which object types will be pruned.
By default the following object types are pruned:
- container
- volume
- network
Docker Prune by default does not prune docker images since they may be still used in the future and downloading them again from a registry might waste resources.
This image was created to cleanup docker swarm clusters regulary.
Take a look at the example docker-stack.yml file to regulary cleanup all swarm nodes.
The cleanup interval can be supplied by setting the SLEEP environment variable to the number of seconds between runs. If the SLEEP environment variable is empty a one-shot cleanup is done. Alternatively the restart_policy configuration option in the compose file can be used to restart docker-prune regulary.
The object types to be pruned can be passed as parameter (using docker run) or the command configuration option in the compose file:
command: ["container", "volume", "network"]
To give it a one-shot try to remove unused images, only:
$ docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/ledermann/docker-prune image
>>> docker image prune <<<
Deleted Images:
deleted: sha256:115c7fd768e29aeaa7b73c49038e3ef90c9a4442148cc70551044783a5c3b77b
deleted: sha256:475df15d32b7f8386512b7dc5f4f845c258e3f5d1e50aea3ac5bb9eeaba1b845
deleted: sha256:667ef6c992d85f5b74d5fec93f1f1502f8998f100777517b89e4dbb7b3579645
deleted: sha256:6a1c0a862d42702df4fc256166e4e63623b7ac75403cb8a1fc8c1f056df3d299
deleted: sha256:d48b5de8ab62215be74ed7718f5dd22320d4030429deb38eba2845ec1c49602e
deleted: sha256:8c88801e4e750035322abfabb6d2b910470cac9cd5b21c93cbfec3c19cd1dbc6
deleted: sha256:3219867dba3087b460e46078893052a53bc5c69dd6775a28e4e709e2f40c6164
deleted: sha256:49a415acbc8dba4683a54938ad125e80269f163894b5f0d28df8e86760fd0327
deleted: sha256:4992b2273f11db6e650b72389f10fd7db78264df95e40799b6ab18c60f56a41b
deleted: sha256:d6202f1cda4713538f48fb75d565455c4ef50558aafa843a7cc4e9e390d7d818
deleted: sha256:8659d27968a9bc611626a5b5f8282f115f3a699ddd749323cba43837c48e00b7
deleted: sha256:079e0c10aae2262a592907c1d284cb900b81edebed3162d293244f264793d988
Total reclaimed space: 681B