72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
% DOCKER(1) Docker User Manuals
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% Docker Community
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% JUNE 2014
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# NAME
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docker-commit - Create a new image from a container's changes
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# SYNOPSIS
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**docker commit**
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[**-a**|**--author**[=*AUTHOR*]]
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[**-c**|**--change**[=\[*DOCKERFILE INSTRUCTIONS*\]]]
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[**--help**]
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[**-m**|**--message**[=*MESSAGE*]]
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[**-p**|**--pause**[=*true*]]
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CONTAINER [REPOSITORY[:TAG]]
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# DESCRIPTION
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Create a new image from an existing container specified by name or
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container ID. The new image will contain the contents of the
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container filesystem, *excluding* any data volumes. Refer to **docker-tag(1)**
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for more information about valid image and tag names.
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While the `docker commit` command is a convenient way of extending an
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existing image, you should prefer the use of a Dockerfile and `docker
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build` for generating images that you intend to share with other
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people.
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# OPTIONS
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**-a**, **--author**=""
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Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
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**-c** , **--change**=[]
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Apply specified Dockerfile instructions while committing the image
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Supported Dockerfile instructions: `CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`LABEL`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
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**--help**
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Print usage statement
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**-m**, **--message**=""
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Commit message
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**-p**, **--pause**=*true*|*false*
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Pause container during commit. The default is *true*.
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# EXAMPLES
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## Creating a new image from an existing container
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An existing Fedora based container has had Apache installed while running
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in interactive mode with the bash shell. Apache is also running. To
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create a new image run `docker ps` to find the container's ID and then run:
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# docker commit -m="Added Apache to Fedora base image" \
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-a="A D Ministrator" 98bd7fc99854 fedora/fedora_httpd:20
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Note that only a-z0-9-_. are allowed when naming images from an
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existing container.
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## Apply specified Dockerfile instructions while committing the image
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If an existing container was created without the DEBUG environment
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variable set to "true", you can create a new image based on that
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container by first getting the container's ID with `docker ps` and
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then running:
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# docker commit -c="ENV DEBUG true" 98bd7fc99854 debug-image
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# HISTORY
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April 2014, Originally compiled by William Henry (whenry at redhat dot com)
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based on docker.com source material and in
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June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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July 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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Oct 2014, updated by Daniel, Dao Quang Minh <daniel at nitrous dot io>
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June 2015, updated by Sally O'Malley <somalley@redhat.com>
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