docker-commit.1.md

% DOCKER(1) Docker User Manuals % Docker Community % JUNE 2014

NAME

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

SYNOPSIS

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

DESCRIPTION

Using an existing container's name or ID you can create a new image.

OPTIONS

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

-c , --change=[] Apply specified Dockerfile instructions while committing the image Supported Dockerfile instructions: CMD|ENTRYPOINT|ENV|EXPOSE|ONBUILD|USER|VOLUME|WORKDIR

--help Print usage statement

-m, --message="" Commit message

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

EXAMPLES

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

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

HISTORY

April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on docker.com 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