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page_title: Repository page_description: Definition of an Repository page_keywords: containers, concepts, explanation, image, repository, container
Repository
Introduction
A repository is a set of images either on your local Docker server, or shared, by pushing it to a Registry server.
Images can be associated with a repository (or multiple) by giving them an image name using one of three different commands:
- At build time (e.g.,
docker build -t IMAGENAME
), - When committing a container (e.g.,
docker commit CONTAINERID IMAGENAME
) or - When tagging an image id with an image name (e.g.,
docker tag IMAGEID IMAGENAME
).
A Fully Qualified Image Name (FQIN) can be made up of 3 parts:
[registry_hostname[:port]/][user_name/](repository_name:version_tag)
username
and registry_hostname
default to an empty string. When
registry_hostname
is an empty string, then docker push
will push to
index.docker.io:80
.
If you create a new repository which you want to share, you will need to
set at least the user_name
, as the default
blank user_name
prefix is
reserved for Official Repositories.
For more information see Working with Repositories