4.5 KiB
commit
Create a new image from a container's changes
Aliases
docker container commit, docker commit
Options
| Name | Type | Default | Description |
|---|---|---|---|
-a, --author |
string |
Author (e.g., John Hannibal Smith <hannibal@a-team.com>) |
|
-c, --change |
list |
Apply Dockerfile instruction to the created image | |
-m, --message |
string |
Commit message | |
-p, --pause |
Pause container during commit |
Description
It can be useful to commit a container's file changes or settings into a new image. This lets you debug a container by running an interactive shell, or export a working dataset to another server.
Commits do not include any data contained in mounted volumes.
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's
created. Supported Dockerfile instructions:
CMD|ENTRYPOINT|ENV|EXPOSE|LABEL|ONBUILD|USER|VOLUME|WORKDIR
Examples
Commit a container
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c3f279d17e0a ubuntu:22.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky
197387f1b436 ubuntu:22.04 /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 (--change)
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c3f279d17e0a ubuntu:22.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky
197387f1b436 ubuntu:22.04 /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
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c3f279d17e0a ubuntu:22.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky
197387f1b436 ubuntu:22.04 /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:22.04 /bin/bash 7 days ago Up 25 hours desperate_dubinsky
197387f1b436 ubuntu:22.04 /bin/bash 7 days ago Up 25 hours focused_hamilton