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Registry

⬅️ Back to Docker overview

By default, the Docker engine interacts with DockerHub which is a hosted registry solution by Docker Inc. If you run docker run nginx the image is pulled from DockerHub.

Login to Docker hub

docker login

You can create your own registry and push/pull images from there.

docker run -d -p 5000:5000 --name registry registry:2

Choose a folder with a Dockerfile

docker build . -t my-image

Tag the build image and push it to your registry

docker image tag my-image localhost:5000/my-image
docker push localhost:5000/my-image

💡 The name of the image contains the registry. Use docker pull [server-addr/image-name] to pull the images that we pushed earlier.

docker pull localhost:5000/my-image

💡 To check the list of images pushed , use curl -X GET localhost:5000/v2/_catalog

Exercise

  • 📝 Run a registry server with name equals to my-registry using registry:2 image with host port set to 5001, and restart policy set to always. Note: Registry server is exposed on port 5000 in the image.
  • 📝 Pull the latest httpd image from docker hub and push it to your newly created registry.