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page_title: Docker Hub Enterprise: User guide page_description: Documentation describing basic use of Docker Hub Enterprise page_keywords: docker, documentation, about, technology, hub, enterprise

Docker Hub Enterprise User's Guide

This guide covers tasks and functions a user of Docker Hub Enterprise (DHE) will need to know about, such as pushing or pulling images, etc. For tasks DHE administrators need to accomplish, such as configuring or monitoring DHE, please visit the Administrator's Guide.

Overview

The primary use case for DHE users is to push and pull images to and from the DHE image storage service. For example, you might pull an Official Image for Ubuntu from the Docker Hub, customize it with configuration settings for your infrastructure and then push it to your DHE image storage for other developers to pull and use for their development environments.

Pushing and pulling images with DHE works very much like any other Docker registry: you use the docker pull command to retrieve images and the docker push command to add an image to a DHE repository. To learn more about Docker images, see User Guide: Working with Docker Images. For a step-by-step example of the entire process, see the Quick Start: Basic Workflow Guide.

Note: If your DHE instance has authentication enabled, you will need to use your command line to docker login <dhe-hostname> (e.g., docker login dhe.yourdomain.com).

Failures due to unauthenticated docker push and docker pull commands will look like :
$ docker pull dhe.yourdomain.com/hello-world
Pulling repository dhe.yourdomain.com/hello-world
FATA[0001] Error: image hello-world:latest not found

$ docker push dhe.yourdomain.com/hello-world
The push refers to a repository [dhe.yourdomain.com/hello-world] (len: 1)
e45a5af57b00: Image push failed
FATA[0001] Error pushing to registry: token auth attempt for registry
https://dhe.yourdomain.com/v2/:
https://dhe.yourdomain.com/auth/v2/token/?scope=
repository%3Ahello-world%3Apull%2Cpush&service=dhe.yourdomain.com
request failed with status: 401 Unauthorized

Pushing Images

You push an image up to a DHE repository by using the docker push command.

You can add a tag to your image so that you can more easily identify it amongst other variants and so that it refers to your DHE server.

`$ docker tag hello-world:latest dhe.yourdomain.com/yourusername/hello-mine:latest`

The command labels a hello-world:latest image using a new tag in the [REGISTRYHOST/][USERNAME/]NAME[:TAG] format. The REGISTRYHOST in this case is your DHE server, dhe.yourdomain.com, and the USERNAME is yourusername. Lastly, the image tag is set to hello-mine:latest.

Once an image is tagged, you can push it to DHE with:

`$ docker push dhe.yourdomain.com/demouser/hello-mine:latest`

Note: If the Docker daemon on which you are running docker push doesn't have the right certificates set up, you will get an error similar to:

$ docker push dhe.yourdomain.com/demouser/hello-world
FATA[0000] Error response from daemon: v1 ping attempt failed with error:
Get https://dhe.yourdomain.com/v1/_ping: x509: certificate signed by
unknown authority. If this private registry supports only HTTP or HTTPS
with an unknown CA certificate, please add `--insecure-registry
dhe.yourdomain.com` to the daemon's arguments. In the case of HTTPS, if
you have access to the registry's CA certificate, no need for the flag;
simply place the CA certificate at
/etc/docker/certs.d/dhe.yourdomain.com/ca.crt

Pulling images

You can retrieve an image with the docker pull command, or you can retrieve an image and run Docker to build the container with the docker runcommand.

To retrieve an image from DHE and then run Docker to build the container, add the needed info to docker run:

    $ docker run dhe.yourdomain.com/yourusername/hello-mine
    latest: Pulling from dhe.yourdomain.com/yourusername/hello-mine
    511136ea3c5a: Pull complete
    31cbccb51277: Pull complete
    e45a5af57b00: Already exists
    Digest: sha256:45f0de377f861694517a1440c74aa32eecc3295ea803261d62f950b1b757bed1
    Status: Downloaded newer image for dhe.yourdomain.com/demouser/hello-mine:latest

Note that if you don't specify a version, by default the latest version of an image will be pulled.

If you run docker images after this you'll see a hello-mine image.

    $ docker images
    REPOSITORY                           TAG     IMAGE ID      CREATED       VIRTUAL SIZE
    dhe.yourdomain.com/yourusername/hello-mine  latest  e45a5af57b00  3 months ago  910 B

To pull an image without building the container, use docker pull and specify your DHE registry by adding it to the command:

 $ docker pull dhe.yourdomain.com/yourusername/hello-mine

Next Steps

For information on administering DHE, take a look at the Administrator's Guide.

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