docker volume prune

内容説明	Remove unused local volumes
利用方法	`docker volume prune [OPTIONS]`

内容説明

Remove all unused local volumes. Unused local volumes are those which are not referenced by any containers. By default, it only removes anonymous volumes.

オプション

オプション	デフォルト	内容説明
`-a, --all`		API 1.42 以上 Remove all unused volumes, not just anonymous ones
`--filter`		Provide filter values (e.g. `label=<label>`)
`-f, --force`		Do not prompt for confirmation

利用例

$ docker volume prune

WARNING! This will remove anonymous local volumes not used by at least one container.
Are you sure you want to continue? [y/N] y
Deleted Volumes:
07c7bdf3e34ab76d921894c2b834f073721fccfbbcba792aa7648e3a7a664c2e
my-named-vol

Total reclaimed space: 36 B

Filtering (--all, -a)

Use the --all flag to prune both unused anonymous and named volumes.

Filtering (--filter)

The filtering flag (--filter) format is of "key=value". If there is more than one filter, then pass multiple flags (e.g., --filter "foo=bar" --filter "bif=baz")

The currently supported filters are:

label (label=<key>, label=<key>=<value>, label!=<key>, or label!=<key>=<value>) - only remove volumes with (or without, in case label!=... is used) the specified labels.

The label filter accepts two formats. One is the label=... (label=<key> or label=<key>=<value>), which removes volumes with the specified labels. The other format is the label!=... (label!=<key> or label!=<key>=<value>), which removes volumes without the specified labels.