DockerCLI/man/docker-tag.1.md

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% DOCKER(1) Docker User Manuals
% Docker Community
% JUNE 2014
# NAME
docker-tag - Create a tag `TARGET_IMAGE` that refers to `SOURCE_IMAGE`
# SYNOPSIS
**docker tag**
[**--help**]
SOURCE_NAME[:TAG] TARGET_NAME[:TAG]
# DESCRIPTION
Assigns a new alias to an image in a registry. An alias refers to the
entire image name including the optional `TAG` after the ':'.
# "OPTIONS"
**--help**
Print usage statement.
**NAME**
The image name which is made up of slash-separated name components,
optionally prefixed by a registry hostname. The hostname must comply with
standard DNS rules, but may not contain underscores. If a hostname is
present, it may optionally be followed by a port number in the format
`:8080`. If not present, the command uses Docker's public registry located at
`registry-1.docker.io` by default. Name components may contain lowercase
characters, digits and separators. A separator is defined as a period, one or
two underscores, or one or more dashes. A name component may not start or end
with a separator.
**TAG**
The tag assigned to the image to version and distinguish images with the same
name. The tag name may contain lowercase and uppercase characters, digits,
underscores, periods and dashes. A tag name may not start with a period or a
dash and may contain a maximum of 128 characters.
# EXAMPLES
## Tagging an image referenced by ID
To tag a local image with ID "0e5574283393" into the "fedora" repository with
"version1.0":
docker tag 0e5574283393 fedora/httpd:version1.0
## Tagging an image referenced by Name
To tag a local image with name "httpd" into the "fedora" repository with
"version1.0":
docker tag httpd fedora/httpd:version1.0
Note that since the tag name is not specified, the alias is created for an
existing local version `httpd:latest`.
## Tagging an image referenced by Name and Tag
To tag a local image with name "httpd" and tag "test" into the "fedora"
repository with "version1.0.test":
docker tag httpd:test fedora/httpd:version1.0.test
## Tagging an image for a private repository
To push an image to a private registry and not the central Docker
registry you must tag it with the registry hostname and port (if needed).
docker tag 0e5574283393 myregistryhost:5000/fedora/httpd:version1.0
# HISTORY
April 2014, Originally compiled by William Henry (whenry at redhat dot com)
based on docker.com source material and internal work.
June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
July 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
April 2015, updated by Mary Anthony for v2 <mary@docker.com>
June 2015, updated by Sally O'Malley <somalley@redhat.com>