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](./adminguide.md). ## Using DHE to push and pull images The primary use case for DHE users is to push and pull images to and from the DHE image storage service. The following instructions describe these procedures. > **Note**: If your DHE instance has authentication enabled, you will need to >use your command line to `docker login ` (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 1. Pull the `hello-world` official image from the Docker Hub. By default, if Docker can't find an image locally, it will attempt to pull the image from the Docker Hub. `$ docker pull hello-world` 2. List your available images. $ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE hello-world latest e45a5af57b00 3 months ago 910 B Your list should include the `hello-world` image from the earlier run. 3. Re-tag the `hello-world` image so that it refers to your DHE server. `$ docker tag hello-world:latest dhe.yourdomain.com/demouser/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 the DHE server, `dhe.yourdomain.com`, and the `USERNAME` is `demouser`. 4. List your new image. $ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE hello-world latest e45a5af57b00 3 months ago 910 B dhe.yourdomain.com/demouser/hello-mine latest e45a5af57b00 3 months ago 910 B You should see your new image label in the listing, with the same `IMAGE ID` as the Official image. 5. Push this new image to your DHE server. `$ docker push dhe.yourdomain.com/demouser/hello-mine:latest` 6. Set up a test of DHE by removing all images from your local environment: `$ docker rmi -f $(docker images -q -a)` This command is for illustrative purposes only: removing the image forces any subsequent `run` to pull from a remote registry (such as DHE) rather than from a local cache. If you run `docker images` after this you should not see any instance of `hello-world` or `hello-mine` in your images list. $ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE 7. Try running `hello-mine`. $ docker run hello-mine Unable to find image 'hello-mine:latest' locally Pulling repository hello-mine FATA[0007] Error: image library/hello-mine:latest not found The `run` command fails because your new image doesn't exist on the Docker Hub. 8. Run `hello-mine` again, this time pointing it to pull from DHE: $ docker run dhe.yourdomain.com/demouser/hello-mine latest: Pulling from dhe.yourdomain.com/demouser/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 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/demouser/hello-mine latest e45a5af57b00 3 months ago 910 B > **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 9. You have now successfully created a custom image, `hello-mine`, tagged it, and pushed it to the image storage provided by your DHE instance. You then pulled that image back down from DHE and onto your machine, where you can use it to create a container containing the "Hello World" application.. ## Next Steps For information on administering DHE, take a look at the [Administrator's Guide](./adminguide.md).