Working with Docker Images
Tested Infrastructure
| Platform | Number of Instance | Reading Time |
|---|---|---|
| Play with Docker | 1 | 5 min |
Pre-requisite
- Create an account with DockerHub
- Open PWD Platform on your browser
- Click on Add New Instance on the left side of the screen to bring up Alpine OS instance on the right side
Listing the Docker Images
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest 4ab4c602aa5e 6 weeks ago 1.84kB
Show all images (default hides intermediate images)
docker images -a
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest 4ab4c602aa5e 6 weeks ago 1.84kB
List images by name and tag
The docker images command takes an optional [REPOSITORY[:TAG]] argument that restricts the list to images that match the argument. If you specify REPOSITORY but no TAG, the docker images command lists all images in the given repository.
To demo this, let us pull all various versions of alpine OS
docker pull alpine:3.6
docker pull alpine:3.7
docker pull alpine:3.8
docker pull alpine:3.9
[node4] (local) root@192.168.0.20 ~
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
alpine 3.6 43773d1dba76 7 days ago 4.03MB
alpine 3.7 6d1ef012b567 7 days ago 4.21MB
alpine 3.8 dac705114996 7 days ago 4.41MB
alpine 3.9 5cb3aa00f899 7 days ago 5.53MB
[node4] (local) root@192.168.0.20 ~
$ docker images alpine:3.7
REPOSITORY TAG IMAGE ID CREATED SIZE
alpine 3.7 6d1ef012b567 7 days ago 4.21MB
List the full length image IDs
$ docker images --no-trunc
REPOSITORY TAG IMAGE ID CREATED
SIZE
alpine 3.6 sha256:43773d1dba76c4d537b494a8454558a41729b92aa2ad0feb23521c3e58cd0440 7 days ago
4.03MB
alpine 3.7 sha256:6d1ef012b5674ad8a127ecfa9b5e6f5178d171b90ee462846974177fd9bdd39f 7 days ago
4.21MB
alpine 3.8 sha256:dac7051149965716b0acdcab16380b5f4ab6f2a1565c86ed5f651e954d1e615c 7 days ago
4.41MB
alpine 3.9 sha256:5cb3aa00f89934411ffba5c063a9bc98ace875d8f92e77d0029543d9f2ef4ad0 7 days ago
5.53MB
Listing out images with filter
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest 94e814e2efa8 3 days ago 88.9MB
alpine 3.6 43773d1dba76 7 days ago 4.03MB
alpine 3.7 6d1ef012b567 7 days ago 4.21MB
alpine 3.8 dac705114996 7 days ago 4.41MB
alpine 3.9 5cb3aa00f899 7 days ago 5.53MB
If you want to filter out just alpine
$ docker images --filter=reference='alpine'
REPOSITORY TAG IMAGE ID CREATED SIZE
alpine 3.6 43773d1dba76 7 days ago 4.03MB
alpine 3.7 6d1ef012b567 7 days ago 4.21MB
alpine 3.8 dac705114996 7 days ago 4.41MB
alpine 3.9 5cb3aa00f899 7 days ago 5.53MB
Explanation
The [REPOSITORY[:TAG]] value must be an “exact match”.
Did you Know?
Additional Reference
Where to get help:
Where to file issues:
Contributor
Supported architectures: (more info)
amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x, windows-amd64