1# image prune
2
3<!---MARKER_GEN_START-->
4Remove unused images
5
6### Options
7
8| Name | Type | Default | Description |
9|:----------------------|:---------|:--------|:-------------------------------------------------|
10| `-a`, `--all` | | | Remove all unused images, not just dangling ones |
11| [`--filter`](#filter) | `filter` | | Provide filter values (e.g. `until=<timestamp>`) |
12| `-f`, `--force` | | | Do not prompt for confirmation |
13
14
15<!---MARKER_GEN_END-->
16
17## Description
18
19Remove all dangling images. If `-a` is specified, also remove all images not referenced by any container.
20
21## Examples
22
23Example output:
24
25```console
26$ docker image prune -a
27
28WARNING! This will remove all images without at least one container associated to them.
29Are you sure you want to continue? [y/N] y
30Deleted Images:
31untagged: alpine:latest
32untagged: alpine@sha256:3dcdb92d7432d56604d4545cbd324b14e647b313626d99b889d0626de158f73a
33deleted: sha256:4e38e38c8ce0b8d9041a9c4fefe786631d1416225e13b0bfe8cfa2321aec4bba
34deleted: sha256:4fe15f8d0ae69e169824f25f1d4da3015a48feeeeebb265cd2e328e15c6a869f
35untagged: alpine:3.3
36untagged: alpine@sha256:4fa633f4feff6a8f02acfc7424efd5cb3e76686ed3218abf4ca0fa4a2a358423
37untagged: my-jq:latest
38deleted: sha256:ae67841be6d008a374eff7c2a974cde3934ffe9536a7dc7ce589585eddd83aff
39deleted: sha256:34f6f1261650bc341eb122313372adc4512b4fceddc2a7ecbb84f0958ce5ad65
40deleted: sha256:cf4194e8d8db1cb2d117df33f2c75c0369c3a26d96725efb978cc69e046b87e7
41untagged: my-curl:latest
42deleted: sha256:b2789dd875bf427de7f9f6ae001940073b3201409b14aba7e5db71f408b8569e
43deleted: sha256:96daac0cb203226438989926fc34dd024f365a9a8616b93e168d303cfe4cb5e9
44deleted: sha256:5cbd97a14241c9cd83250d6b6fc0649833c4a3e84099b968dd4ba403e609945e
45deleted: sha256:a0971c4015c1e898c60bf95781c6730a05b5d8a2ae6827f53837e6c9d38efdec
46deleted: sha256:d8359ca3b681cc5396a4e790088441673ed3ce90ebc04de388bfcd31a0716b06
47deleted: sha256:83fc9ba8fb70e1da31dfcc3c88d093831dbd4be38b34af998df37e8ac538260c
48deleted: sha256:ae7041a4cc625a9c8e6955452f7afe602b401f662671cea3613f08f3d9343b35
49deleted: sha256:35e0f43a37755b832f0bbea91a2360b025ee351d7309dae0d9737bc96b6d0809
50deleted: sha256:0af941dd29f00e4510195dd00b19671bc591e29d1495630e7e0f7c44c1e6a8c0
51deleted: sha256:9fc896fc2013da84f84e45b3096053eb084417b42e6b35ea0cce5a3529705eac
52deleted: sha256:47cf20d8c26c46fff71be614d9f54997edacfe8d46d51769706e5aba94b16f2b
53deleted: sha256:2c675ee9ed53425e31a13e3390bf3f539bf8637000e4bcfbb85ee03ef4d910a1
54
55Total reclaimed space: 16.43 MB
56```
57
58### <a name="filter"></a> Filtering (--filter)
59
60The filtering flag (`--filter`) format is of "key=value". If there is more
61than one filter, then pass multiple flags (e.g., `--filter "foo=bar" --filter "bif=baz"`)
62
63The currently supported filters are:
64
65* until (`<timestamp>`) - only remove images created before given timestamp
66* 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.
67
68The `until` filter can be Unix timestamps, date formatted
69timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed
70relative to the daemon machine’s time. Supported formats for date
71formatted time stamps include RFC3339Nano, RFC3339, `2006-01-02T15:04:05`,
72`2006-01-02T15:04:05.999999999`, `2006-01-02Z07:00`, and `2006-01-02`. The local
73timezone on the daemon will be used if you do not provide either a `Z` or a
74`+-00:00` timezone offset at the end of the timestamp. When providing Unix
75timestamps enter seconds[.nanoseconds], where seconds is the number of seconds
76that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap
77seconds (aka Unix epoch or Unix time), and the optional .nanoseconds field is a
78fraction of a second no more than nine digits long.
79
80The `label` filter accepts two formats. One is the `label=...` (`label=<key>` or `label=<key>=<value>`),
81which removes images with the specified labels. The other
82format is the `label!=...` (`label!=<key>` or `label!=<key>=<value>`), which removes
83images without the specified labels.
84
85> **Predicting what will be removed**
86>
87> If you are using positive filtering (testing for the existence of a label or
88> that a label has a specific value), you can use `docker image ls` with the
89> same filtering syntax to see which images match your filter.
90>
91> However, if you are using negative filtering (testing for the absence of a
92> label or that a label doesn't have a specific value), this type of filter
93> doesn't work with `docker image ls` so you cannot easily predict which images
94> will be removed. In addition, the confirmation prompt for `docker image prune`
95> always warns that all dangling images will be removed, even if you are using
96> `--filter`.
97
98The following removes images created before `2017-01-04T00:00:00`:
99
100```console
101$ docker images --format 'table {{.Repository}}\t{{.Tag}}\t{{.ID}}\t{{.CreatedAt}}\t{{.Size}}'
102REPOSITORY TAG IMAGE ID CREATED AT SIZE
103foo latest 2f287ac753da 2017-01-04 13:42:23 -0800 PST 3.98 MB
104alpine latest 88e169ea8f46 2016-12-27 10:17:25 -0800 PST 3.98 MB
105busybox latest e02e811dd08f 2016-10-07 14:03:58 -0700 PDT 1.09 MB
106
107$ docker image prune -a --force --filter "until=2017-01-04T00:00:00"
108
109Deleted Images:
110untagged: alpine:latest
111untagged: alpine@sha256:dfbd4a3a8ebca874ebd2474f044a0b33600d4523d03b0df76e5c5986cb02d7e8
112untagged: busybox:latest
113untagged: busybox@sha256:29f5d56d12684887bdfa50dcd29fc31eea4aaf4ad3bec43daf19026a7ce69912
114deleted: sha256:e02e811dd08fd49e7f6032625495118e63f597eb150403d02e3238af1df240ba
115deleted: sha256:e88b3f82283bc59d5e0df427c824e9f95557e661fcb0ea15fb0fb6f97760f9d9
116
117Total reclaimed space: 1.093 MB
118
119$ docker images --format 'table {{.Repository}}\t{{.Tag}}\t{{.ID}}\t{{.CreatedAt}}\t{{.Size}}'
120
121REPOSITORY TAG IMAGE ID CREATED AT SIZE
122foo latest 2f287ac753da 2017-01-04 13:42:23 -0800 PST 3.98 MB
123```
124
125The following removes images created more than 10 days (`240h`) ago:
126
127```console
128$ docker images
129
130REPOSITORY TAG IMAGE ID CREATED SIZE
131foo latest 2f287ac753da 14 seconds ago 3.98 MB
132alpine latest 88e169ea8f46 8 days ago 3.98 MB
133debian jessie 7b0a06c805e8 2 months ago 123 MB
134busybox latest e02e811dd08f 2 months ago 1.09 MB
135golang 1.7.0 138c2e655421 4 months ago 670 MB
136
137$ docker image prune -a --force --filter "until=240h"
138
139Deleted Images:
140untagged: golang:1.7.0
141untagged: golang@sha256:6765038c2b8f407fd6e3ecea043b44580c229ccfa2a13f6d85866cf2b4a9628e
142deleted: sha256:138c2e6554219de65614d88c15521bfb2da674cbb0bf840de161f89ff4264b96
143deleted: sha256:ec353c2e1a673f456c4b78906d0d77f9d9456cfb5229b78c6a960bfb7496b76a
144deleted: sha256:fe22765feaf3907526b4921c73ea6643ff9e334497c9b7e177972cf22f68ee93
145deleted: sha256:ff845959c80148421a5c3ae11cc0e6c115f950c89bc949646be55ed18d6a2912
146deleted: sha256:a4320831346648c03db64149eafc83092e2b34ab50ca6e8c13112388f25899a7
147deleted: sha256:4c76020202ee1d9709e703b7c6de367b325139e74eebd6b55b30a63c196abaf3
148deleted: sha256:d7afd92fb07236c8a2045715a86b7d5f0066cef025018cd3ca9a45498c51d1d6
149deleted: sha256:9e63c5bce4585dd7038d830a1f1f4e44cb1a1515b00e620ac718e934b484c938
150untagged: debian:jessie
151untagged: debian@sha256:c1af755d300d0c65bb1194d24bce561d70c98a54fb5ce5b1693beb4f7988272f
152deleted: sha256:7b0a06c805e8f23807fb8856621c60851727e85c7bcb751012c813f122734c8d
153deleted: sha256:f96222d75c5563900bc4dd852179b720a0885de8f7a0619ba0ac76e92542bbc8
154
155Total reclaimed space: 792.6 MB
156
157$ docker images
158
159REPOSITORY TAG IMAGE ID CREATED SIZE
160foo latest 2f287ac753da About a minute ago 3.98 MB
161alpine latest 88e169ea8f46 8 days ago 3.98 MB
162busybox latest e02e811dd08f 2 months ago 1.09 MB
163```
164
165The following example removes images with the label `deprecated`:
166
167```console
168$ docker image prune --filter="label=deprecated"
169```
170
171The following example removes images with the label `maintainer` set to `john`:
172
173```console
174$ docker image prune --filter="label=maintainer=john"
175```
176
177This example removes images which have no `maintainer` label:
178
179```console
180$ docker image prune --filter="label!=maintainer"
181```
182
183This example removes images which have a maintainer label not set to `john`:
184
185```console
186$ docker image prune --filter="label!=maintainer=john"
187```
188
189> **Note**
190>
191> You are prompted for confirmation before the `prune` removes
192> anything, but you are not shown a list of what will potentially be removed.
193> In addition, `docker image ls` doesn't support negative filtering, so it
194> difficult to predict what images will actually be removed.
195
196## Related commands
197
198* [system df](system_df.md)
199* [container prune](container_prune.md)
200* [volume prune](volume_prune.md)
201* [network prune](network_prune.md)
202* [system prune](system_prune.md)
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