Docker Hub quickstart

Docker Hub provides a vast library of pre-built images and resources, accelerating development workflows and reducing setup time. You can build upon pre-built images from Docker Hub and then use repositories to share and distribute your own images with your team or millions of other developers.

This guide shows you how to find and run a pre-built image. It then walks you through creating a custom image and sharing it through Docker Hub.

Prerequisites

• Download and install Docker
• Create a Docker account

Step 1: Find an image in Docker Hub's library

You can search for content in Docker Hub itself, in the Docker Desktop Dashboard, or by using the CLI.

To search or browse for content on Docker Hub:

Now that you've found an image, it's time to pull and run it on your device.

Step 2: Pull and run an image from Docker Hub

You can run images from Docker Hub using the CLI or Docker Desktop Dashboard.

You've now run a web server without any set up or configuration. Docker Hub provides instant access to pre-built, ready-to-use container images, letting you quickly pull and run applications without needing to install or configure software manually. With Docker Hub's vast library of images, you can experiment with and deploy applications effortlessly, boosting productivity and making it easy to try out new tools, set up development environments, or build on top of existing software.

You can also extend images from Docker Hub, letting you quickly build and customize your own images to suit specific needs.

Step 3: Build and push an image to Docker Hub

1. Create a Dockerfile to specify your application:

   FROM nginx
   RUN echo "<h1>Hello world from Docker!</h1>" > /usr/share/nginx/html/index.html

   This Dockerfile extends the Nginx image from Docker Hub to create a simple website. With just a few lines, you can easily set up, customize, and share a static website using Docker.

2. Run the following command to build your image. Replace <YOUR-USERNAME> with your Docker ID.

   $ docker build -t <YOUR-USERNAME>/nginx-custom .
   

   This command builds your image and tags it so that Docker understands which repository to push it to in Docker Hub. To learn more about the command and its options, see the docker build CLI reference. After running the command, you should see output similar to the following.

   さらに表示

   [+] Building 0.6s (6/6) FINISHED                      docker:desktop-linux
    => [internal] load build definition from Dockerfile                  0.0s
    => => transferring dockerfile: 128B                                  0.0s
    => [internal] load metadata for docker.io/library/nginx:latest       0.0s
    => [internal] load .dockerignore                                     0.0s
    => => transferring context: 2B                                       0.0s
    => [1/2] FROM docker.io/library/nginx:latest                         0.1s
    => [2/2] RUN echo "<h1>Hello world from Docker!</h1>" > /usr/share/  0.2s
    => exporting to image                                                0.1s
    => => exporting layers                                               0.0s
    => => writing image sha256:f85ab68f4987847713e87a95c39009a5c9f4ad78  0.0s
    => => naming to docker.io/mobyismyname/nginx-custom                  0.0s
   

   隠す

3. Run the following command to test your image. Replace <YOUR-USERNAME> with your Docker ID.

   $ docker run -p 8080:80 --rm <YOUR-USERNAME>/nginx-custom
   

4. Visit https://localhost:8080 to view the page. You should see Hello world from Docker!.

5. In the terminal, press CTRL+C to stop the container.

6. Sign in to Docker Desktop. You must be signed in before pushing an image to Docker Hub.

7. Run the following command to push your image to Docker Hub. Replace <YOUR-USERNAME> with your Docker ID.

   $ docker push <YOUR-USERNAME>/nginx-custom
   

   メモ

   You must be signed in to Docker Hub through Docker Desktop or the command line, and you must also name your images correctly, as per the above steps.

   The command pushes the image to Docker Hub and automatically creates the repository if it doesn't exist. To learn more about the command, see the docker push CLI reference. After running the command, you should see output similar to the following.

   さらに表示

   Using default tag: latest
   The push refers to repository [docker.io/mobyismyname/nginx-custom]
   d0e011850342: Pushed
   e4e9e9ad93c2: Mounted from library/nginx
   6ac729401225: Mounted from library/nginx
   8ce189049cb5: Mounted from library/nginx
   296af1bd2844: Mounted from library/nginx
   63d7ce983cd5: Mounted from library/nginx
   b33db0c3c3a8: Mounted from library/nginx
   98b5f35ea9d3: Mounted from library/nginx
   latest: digest: sha256:7f5223ae866e725a7f86b856c30edd3b86f60d76694df81d90b08918d8de1e3f size: 1985
   

   隠す

Now that you've created a repository and pushed your image, it's time to view your repository and explore its options.

Step 4: View your repository on Docker Hub and explore options

You can view your Docker Hub repositories in the Docker Hub or Docker Desktop interface.

You've now verified that your repository exists on Docker Hub, and you've discovered more options for it. View the next steps to learn more about some of these options.

Next steps

Add repository information to help users find and use your image.