docker-commit(1) Create a new image from a container's changes


docker commit [-a|--author[=AUTHOR]] [-c|--change[=[DOCKERFILE INSTRUCTIONS]]] [--help] [-m|--message[=MESSAGE]] [-p|--pause[=true]] CONTAINER [REPOSITORY[:TAG]]


Create a new image from an existing container specified by name or container ID. The new image will contain the contents of the container filesystem, excluding any data volumes.

While the docker commit command is a convenient way of extending an existing image, you should prefer the use of a Dockerfile and docker build for generating images that you intend to share with other people.


-a, --author=""
   Author (e.g., "John Hannibal Smith  <[email protected]>")

-c , --change=[]
   Apply specified Dockerfile instructions while committing the image

  Print usage statement

-m, --message=""
   Commit message

-p, --pause=true|false
   Pause container during commit. The default is true.


Creating a new image from an existing container

An existing Fedora based container has had Apache installed while running in interactive mode with the bash shell. Apache is also running. To create a new image run docker ps to find the container's ID and then run:

# docker commit -m="Added Apache to Fedora base image" \
  -a="A D Ministrator" 98bd7fc99854 fedora/fedora_httpd:20

Note that only a-z0-9-_. are allowed when naming images from an existing container.

Apply specified Dockerfile instructions while committing the image

If an existing container was created without the DEBUG environment variable set to "true", you can create a new image based on that container by first getting the container's ID with docker ps and then running:

# docker commit -c="ENV DEBUG true" 98bd7fc99854 debug-image


April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on source material and in June 2014, updated by Sven Dowideit <[email protected]> July 2014, updated by Sven Dowideit <[email protected]> Oct 2014, updated by Daniel, Dao Quang Minh <daniel at nitrous dot io> June 2015, updated by Sally O'Malley <[email protected]>