MAN page from RedHat EL 7 docker-engine-1.10.3-1.0.2.el7.x86_64.rpm

DOCKER

Section: JUNE 2014 (1)
Updated: Docker User Manuals
Index

NAME

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

SYNOPSIS

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

DESCRIPTION

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

While the docker commit command is a convenient way of extending anexisting image, you should prefer the use of a Dockerfile and dockerbuild for generating images that you intend to share with otherpeople.

OPTIONS

-a, --author=""
Author (e.g., "John Hannibal Smith <hannibalAATTa-team.com>")

--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 runningin interactive mode with the bash shell. Apache is also running. Tocreate 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 anexisting container.

Apply specified Dockerfile instructions while committing the image

If an existing container was created without the DEBUG environmentvariable set to "true", you can create a new image based on thatcontainer by first getting the container's ID with docker ps andthen 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 inJune 2014, updated by Sven Dowideit <SvenDowideitAATThome.org.au>July 2014, updated by Sven Dowideit <SvenDowideitAATThome.org.au>Oct 2014, updated by Daniel, Dao Quang Minh <daniel at nitrous dot io>June 2015, updated by Sally O'Malley <somalleyAATTredhat.com>

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
Creating a new image from an existing container
Apply specified Dockerfile instructions while committing the image
HISTORY

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