Guest24897
/
DockerCLI
mirror of https://github.com/docker/cli.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #849 from mistyhacks/add-filter-label-example 

Add examples of prune by label
This commit is contained in:
Sebastiaan van Stijn 2018-01-30 13:52:34 -08:00 committed by GitHub
parent 9de1b162fa bc28bf13f7
commit 0aabbb09b6
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 42 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
docs/reference/commandline/image_prune.md
View File

@ -95,6 +95,19 @@ which removes images with the specified labels. The other
format is the `label!=...` (`label!=<key>` or `label!=<key>=<value>`), which removes
images without the specified labels.
> **Predicting what will be removed**
>
> If you are using positive filtering (testing for the existence of a label or
> that a label has a specific value), you can use `docker image ls` with the
> same filtering syntax to see which images match your filter.
>
> However, if you are using negative filtering (testing for the absence of a
> label or that a label does *not* have a specific value), this type of filter
> does not work with `docker image ls` so you cannot easily predict which images
> will be removed. In addition, the confirmation prompt for `docker image prune`
> always warns that *all* dangling images will be removed, even if you are using
> `--filter`.
The following removes images created before `2017-01-04T00:00:00`:
```bash
@ -162,6 +175,35 @@ alpine latest 88e169ea8f46 8 days ago
busybox latest e02e811dd08f 2 months ago 1.09 MB
```
The following example removes images with the label `deprecated`:
```bash
$ docker image prune --filter="label=deprecated"
```
The following example removes images with the label `maintainer` set to `john`:
```bash
$ docker image prune --filter="label=maintainer=john"
```
This example removes images which have no `maintainer` label:
```bash
$ docker image prune --filter="label!=maintainer"
```
This example removes images which have a maintainer label not set to `john`:
```bash
$ docker image prune --filter="label!=maintainer=john"
```
> **Note**: You are prompted for confirmation before the `prune` removes
> anything, but you are not shown a list of what will potentially be removed.
> In addition, `docker image ls` does not support negative filtering, so it
> difficult to predict what images will actually be removed.
## Related commands
* [system df](system_df.md)