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command: docker commit

short: Create a new image from a container's changes

long: |-

It can be useful to commit a container's file changes or settings into a new

image. This allows you debug a container by running an interactive shell, or to

export a working dataset to another server. Generally, it is better to use

Dockerfiles to manage your images in a documented and maintainable way.

[Read more about valid image names and tags](tag.md).

The commit operation will not include any data contained in

volumes mounted inside the container.

By default, the container being committed and its processes will be paused

while the image is committed. This reduces the likelihood of encountering data

corruption during the process of creating the commit. If this behavior is

undesired, set the `--pause` option to false.

The `--change` option will apply `Dockerfile` instructions to the image that is

created. Supported `Dockerfile` instructions:

`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`LABEL`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`

usage: docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

pname: docker

plink: docker.yaml

options:

- option: author

shorthand: a

description: Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")

- option: change

shorthand: c

default_value: '[]'

description: Apply Dockerfile instruction to the created image

- option: message

shorthand: m

description: Commit message

- option: pause

shorthand: p

default_value: "true"

description: Pause container during commit

examples: |-

### Commit a container

```bash

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

c3f279d17e0a ubuntu:12.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky

197387f1b436 ubuntu:12.04 /bin/bash 7 days ago Up 25 hours focused_hamilton

$ docker commit c3f279d17e0a svendowideit/testimage:version3

f5283438590d

$ docker images

REPOSITORY TAG ID CREATED SIZE

svendowideit/testimage version3 f5283438590d 16 seconds ago 335.7 MB

```

### Commit a container with new configurations

```bash

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

c3f279d17e0a ubuntu:12.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky

197387f1b436 ubuntu:12.04 /bin/bash 7 days ago Up 25 hours focused_hamilton

$ docker inspect -f "{{ .Config.Env }}" c3f279d17e0a

[HOME=/ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin]

$ docker commit --change "ENV DEBUG true" c3f279d17e0a svendowideit/testimage:version3

f5283438590d

$ docker inspect -f "{{ .Config.Env }}" f5283438590d

[HOME=/ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin DEBUG=true]

```

### Commit a container with new `CMD` and `EXPOSE` instructions

```bash

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

c3f279d17e0a ubuntu:12.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky

197387f1b436 ubuntu:12.04 /bin/bash 7 days ago Up 25 hours focused_hamilton

$ docker commit --change='CMD ["apachectl", "-DFOREGROUND"]' -c "EXPOSE 80" c3f279d17e0a svendowideit/testimage:version4

f5283438590d

$ docker run -d svendowideit/testimage:version4

89373736e2e7f00bc149bd783073ac43d0507da250e999f3f1036e0db60817c0

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

89373736e2e7 testimage:version4 "apachectl -DFOREGROU" 3 seconds ago Up 2 seconds 80/tcp distracted_fermat

c3f279d17e0a ubuntu:12.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky

197387f1b436 ubuntu:12.04 /bin/bash 7 days ago Up 25 hours focused_hamilton

```