DOCKER(1)

NAME
docker-image-tag - Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE

SYNOPSIS
docker image tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[: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
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
   letters, 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 must be valid ASCII and may contain lowercase and
   uppercase letters, digits, underscores, periods and hyphens. A tag name
   may not start with a period or a hyphen 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 image 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 image 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 image tag httpd:test fedora/httpd:version1.0.test

Tagging an image for a private repository
Before pushing 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 image tag 0e5574283393 myregistryhost:5000/fedora/httpd:version1.0

SEE ALSO
docker-image(1)