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page_title: Repositories and Images on Docker Hub page_description: Repositories and Images on Docker Hub page_keywords: Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation

Repositories and Images on Docker Hub

repositories

Searching for repositories and images

You can search for all the publicly available repositories and images using Docker.

$ docker search ubuntu

This will show you a list of the currently available repositories on the Docker Hub which match the provided keyword.

If a repository is private it won't be listed on the repository search results. To see repository statuses, you can look at your profile page on Docker Hub.

Repositories

Your Docker Hub repositories have a number of useful features.

Stars

Your repositories can be starred and you can star repositories in return. Stars are a way to show that you like a repository. They are also an easy way of bookmarking your favorites.

Comments

You can interact with other members of the Docker community and maintainers by leaving comments on repositories. If you find any comments that are not appropriate, you can flag them for review.

Collaborators and their role

A collaborator is someone you want to give access to a private repository. Once designated, they can push and pull to your repositories. They will not be allowed to perform any administrative tasks such as deleting the repository or changing its status from private to public.

Note: A collaborator cannot add other collaborators. Only the owner of the repository has administrative access.

You can also collaborate on Docker Hub with organizations and groups. You can read more about that here.

Official Repositories

The Docker Hub contains a number of official repositories. These are certified repositories from vendors and contributors to Docker. They contain Docker images from vendors like Canonical, Oracle, and Red Hat that you can use to build applications and services.

If you use Official Repositories you know you're using a supported, optimized and up-to-date image to power your applications.

Note: If you would like to contribute an official repository for your organization, product or team you can see more information here.

Private Repositories

Private repositories allow you to have repositories that contain images that you want to keep private, either to your own account or within an organization or group.

To work with a private repository on Docker Hub, you will need to add one via the Add Repository link. You get one private repository for free with your Docker Hub account. If you need more accounts you can upgrade your Docker Hub plan.

Once the private repository is created, you can push and pull images to and from it using Docker.

Note: You need to be signed in and have access to work with a private repository.

Private repositories are just like public ones. However, it isn't possible to browse them or search their content on the public registry. They do not get cached the same way as a public repository either.

It is possible to give access to a private repository to those whom you designate (i.e., collaborators) from its Settings page. From there, you can also switch repository status (public to private, or vice-versa). You will need to have an available private repository slot open before you can do such a switch. If you don't have any available, you can always upgrade your Docker Hub plan.

Webhooks

You can configure webhooks for your repositories on the Repository Settings page. A webhook is called only after a successful push is made. The webhook calls are HTTP POST requests with a JSON payload similar to the example shown below.

Note: For testing, you can try an HTTP request tool like requestb.in.

Example webhook JSON payload:

{
   "push_data":{
      "pushed_at":1385141110,
      "images":[
         "imagehash1",
         "imagehash2",
         "imagehash3"
      ],
      "pusher":"username"
   },
   "repository":{
      "status":"Active",
      "description":"my docker repo that does cool things",
      "is_automated":false,
      "full_description":"This is my full description",
      "repo_url":"https://registry.hub.docker.com/u/username/reponame/",
      "owner":"username",
      "is_official":false,
      "is_private":false,
      "name":"reponame",
      "namespace":"username",
      "star_count":1,
      "comment_count":1,
      "date_created":1370174400,
      "dockerfile":"my full dockerfile is listed here",
      "repo_name":"username/reponame"
   }
}

Webhooks allow you to notify people, services and other applications of new updates to your images and repositories.