mirror of https://github.com/docker/cli.git
203 lines
9.2 KiB
Markdown
203 lines
9.2 KiB
Markdown
# image prune
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<!---MARKER_GEN_START-->
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Remove unused images
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### Options
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| Name | Type | Default | Description |
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|:----------------------|:---------|:--------|:-------------------------------------------------|
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| `-a`, `--all` | | | Remove all unused images, not just dangling ones |
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| [`--filter`](#filter) | `filter` | | Provide filter values (e.g. `until=<timestamp>`) |
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| `-f`, `--force` | | | Do not prompt for confirmation |
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<!---MARKER_GEN_END-->
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## Description
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Remove all dangling images. If `-a` is specified, also remove all images not referenced by any container.
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## Examples
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Example output:
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```console
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$ docker image prune -a
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WARNING! This will remove all images without at least one container associated to them.
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Are you sure you want to continue? [y/N] y
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Deleted Images:
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untagged: alpine:latest
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untagged: alpine@sha256:3dcdb92d7432d56604d4545cbd324b14e647b313626d99b889d0626de158f73a
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deleted: sha256:4e38e38c8ce0b8d9041a9c4fefe786631d1416225e13b0bfe8cfa2321aec4bba
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deleted: sha256:4fe15f8d0ae69e169824f25f1d4da3015a48feeeeebb265cd2e328e15c6a869f
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untagged: alpine:3.3
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untagged: alpine@sha256:4fa633f4feff6a8f02acfc7424efd5cb3e76686ed3218abf4ca0fa4a2a358423
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untagged: my-jq:latest
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deleted: sha256:ae67841be6d008a374eff7c2a974cde3934ffe9536a7dc7ce589585eddd83aff
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deleted: sha256:34f6f1261650bc341eb122313372adc4512b4fceddc2a7ecbb84f0958ce5ad65
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deleted: sha256:cf4194e8d8db1cb2d117df33f2c75c0369c3a26d96725efb978cc69e046b87e7
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untagged: my-curl:latest
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deleted: sha256:b2789dd875bf427de7f9f6ae001940073b3201409b14aba7e5db71f408b8569e
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deleted: sha256:96daac0cb203226438989926fc34dd024f365a9a8616b93e168d303cfe4cb5e9
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deleted: sha256:5cbd97a14241c9cd83250d6b6fc0649833c4a3e84099b968dd4ba403e609945e
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deleted: sha256:a0971c4015c1e898c60bf95781c6730a05b5d8a2ae6827f53837e6c9d38efdec
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deleted: sha256:d8359ca3b681cc5396a4e790088441673ed3ce90ebc04de388bfcd31a0716b06
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deleted: sha256:83fc9ba8fb70e1da31dfcc3c88d093831dbd4be38b34af998df37e8ac538260c
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deleted: sha256:ae7041a4cc625a9c8e6955452f7afe602b401f662671cea3613f08f3d9343b35
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deleted: sha256:35e0f43a37755b832f0bbea91a2360b025ee351d7309dae0d9737bc96b6d0809
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deleted: sha256:0af941dd29f00e4510195dd00b19671bc591e29d1495630e7e0f7c44c1e6a8c0
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deleted: sha256:9fc896fc2013da84f84e45b3096053eb084417b42e6b35ea0cce5a3529705eac
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deleted: sha256:47cf20d8c26c46fff71be614d9f54997edacfe8d46d51769706e5aba94b16f2b
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deleted: sha256:2c675ee9ed53425e31a13e3390bf3f539bf8637000e4bcfbb85ee03ef4d910a1
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Total reclaimed space: 16.43 MB
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```
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### <a name="filter"></a> Filtering (--filter)
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The filtering flag (`--filter`) format is of "key=value". If there is more
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than one filter, then pass multiple flags (e.g., `--filter "foo=bar" --filter "bif=baz"`)
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The currently supported filters are:
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* until (`<timestamp>`) - only remove images created before given timestamp
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* label (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) - only remove images with (or without, in case `label!=...` is used) the specified labels.
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The `until` filter can be Unix timestamps, date formatted
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timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed
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relative to the daemon machine’s time. Supported formats for date
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formatted time stamps include RFC3339Nano, RFC3339, `2006-01-02T15:04:05`,
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`2006-01-02T15:04:05.999999999`, `2006-01-02Z07:00`, and `2006-01-02`. The local
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timezone on the daemon will be used if you do not provide either a `Z` or a
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`+-00:00` timezone offset at the end of the timestamp. When providing Unix
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timestamps enter seconds[.nanoseconds], where seconds is the number of seconds
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that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap
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seconds (aka Unix epoch or Unix time), and the optional .nanoseconds field is a
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fraction of a second no more than nine digits long.
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The `label` filter accepts two formats. One is the `label=...` (`label=<key>` or `label=<key>=<value>`),
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which removes images with the specified labels. The other
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format is the `label!=...` (`label!=<key>` or `label!=<key>=<value>`), which removes
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images without the specified labels.
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> **Predicting what will be removed**
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>
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> If you are using positive filtering (testing for the existence of a label or
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> that a label has a specific value), you can use `docker image ls` with the
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> same filtering syntax to see which images match your filter.
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>
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> However, if you are using negative filtering (testing for the absence of a
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> label or that a label doesn't have a specific value), this type of filter
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> doesn't work with `docker image ls` so you cannot easily predict which images
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> will be removed. In addition, the confirmation prompt for `docker image prune`
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> always warns that all dangling images will be removed, even if you are using
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> `--filter`.
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The following removes images created before `2017-01-04T00:00:00`:
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```console
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$ docker images --format 'table {{.Repository}}\t{{.Tag}}\t{{.ID}}\t{{.CreatedAt}}\t{{.Size}}'
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REPOSITORY TAG IMAGE ID CREATED AT SIZE
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foo latest 2f287ac753da 2017-01-04 13:42:23 -0800 PST 3.98 MB
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alpine latest 88e169ea8f46 2016-12-27 10:17:25 -0800 PST 3.98 MB
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busybox latest e02e811dd08f 2016-10-07 14:03:58 -0700 PDT 1.09 MB
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$ docker image prune -a --force --filter "until=2017-01-04T00:00:00"
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Deleted Images:
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untagged: alpine:latest
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untagged: alpine@sha256:dfbd4a3a8ebca874ebd2474f044a0b33600d4523d03b0df76e5c5986cb02d7e8
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untagged: busybox:latest
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untagged: busybox@sha256:29f5d56d12684887bdfa50dcd29fc31eea4aaf4ad3bec43daf19026a7ce69912
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deleted: sha256:e02e811dd08fd49e7f6032625495118e63f597eb150403d02e3238af1df240ba
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deleted: sha256:e88b3f82283bc59d5e0df427c824e9f95557e661fcb0ea15fb0fb6f97760f9d9
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Total reclaimed space: 1.093 MB
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$ docker images --format 'table {{.Repository}}\t{{.Tag}}\t{{.ID}}\t{{.CreatedAt}}\t{{.Size}}'
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REPOSITORY TAG IMAGE ID CREATED AT SIZE
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foo latest 2f287ac753da 2017-01-04 13:42:23 -0800 PST 3.98 MB
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```
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The following removes images created more than 10 days (`240h`) ago:
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```console
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$ docker images
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REPOSITORY TAG IMAGE ID CREATED SIZE
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foo latest 2f287ac753da 14 seconds ago 3.98 MB
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alpine latest 88e169ea8f46 8 days ago 3.98 MB
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debian jessie 7b0a06c805e8 2 months ago 123 MB
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busybox latest e02e811dd08f 2 months ago 1.09 MB
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golang 1.7.0 138c2e655421 4 months ago 670 MB
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$ docker image prune -a --force --filter "until=240h"
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Deleted Images:
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untagged: golang:1.7.0
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untagged: golang@sha256:6765038c2b8f407fd6e3ecea043b44580c229ccfa2a13f6d85866cf2b4a9628e
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deleted: sha256:138c2e6554219de65614d88c15521bfb2da674cbb0bf840de161f89ff4264b96
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deleted: sha256:ec353c2e1a673f456c4b78906d0d77f9d9456cfb5229b78c6a960bfb7496b76a
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deleted: sha256:fe22765feaf3907526b4921c73ea6643ff9e334497c9b7e177972cf22f68ee93
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deleted: sha256:ff845959c80148421a5c3ae11cc0e6c115f950c89bc949646be55ed18d6a2912
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deleted: sha256:a4320831346648c03db64149eafc83092e2b34ab50ca6e8c13112388f25899a7
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deleted: sha256:4c76020202ee1d9709e703b7c6de367b325139e74eebd6b55b30a63c196abaf3
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deleted: sha256:d7afd92fb07236c8a2045715a86b7d5f0066cef025018cd3ca9a45498c51d1d6
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deleted: sha256:9e63c5bce4585dd7038d830a1f1f4e44cb1a1515b00e620ac718e934b484c938
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untagged: debian:jessie
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untagged: debian@sha256:c1af755d300d0c65bb1194d24bce561d70c98a54fb5ce5b1693beb4f7988272f
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deleted: sha256:7b0a06c805e8f23807fb8856621c60851727e85c7bcb751012c813f122734c8d
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deleted: sha256:f96222d75c5563900bc4dd852179b720a0885de8f7a0619ba0ac76e92542bbc8
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Total reclaimed space: 792.6 MB
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$ docker images
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REPOSITORY TAG IMAGE ID CREATED SIZE
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foo latest 2f287ac753da About a minute ago 3.98 MB
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alpine latest 88e169ea8f46 8 days ago 3.98 MB
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busybox latest e02e811dd08f 2 months ago 1.09 MB
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```
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The following example removes images with the label `deprecated`:
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```console
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$ docker image prune --filter="label=deprecated"
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```
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The following example removes images with the label `maintainer` set to `john`:
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```console
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$ docker image prune --filter="label=maintainer=john"
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```
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This example removes images which have no `maintainer` label:
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```console
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$ docker image prune --filter="label!=maintainer"
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```
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This example removes images which have a maintainer label not set to `john`:
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```console
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$ docker image prune --filter="label!=maintainer=john"
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```
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> **Note**
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>
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> You are prompted for confirmation before the `prune` removes
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> anything, but you are not shown a list of what will potentially be removed.
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> In addition, `docker image ls` doesn't support negative filtering, so it
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> difficult to predict what images will actually be removed.
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## Related commands
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* [system df](system_df.md)
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* [container prune](container_prune.md)
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* [volume prune](volume_prune.md)
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* [network prune](network_prune.md)
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* [system prune](system_prune.md)
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