How to implement Docker Registry to build a private image warehouse

The image of the microservice will be uploaded to the Docker repository for storage. Commonly used public Docker repositories include Alibaba Cloud, NetEase Cloud, etc. You can also build your own Docker private repository in the enterprise LAN. This tutorial uses the private repository registry provided by Docker.

1. Pull the private warehouse image

docker pull registry 

2. Create and start a private warehouse container

docker run -dit -v /data/registry:/var/lib/registry -p 5000:5000 --restart=always --name docker-registry registry

Parameter Description

• -dit: Open a pseudo terminal in the container for interactive operations and run in the background
• -v: Mount the host's /data/registry directory to the container's /var/lib/registry directory (this directory is the directory where the image file is stored in the registry container) to achieve data persistence
• -p: Map port, access the host's port 5000 to access the registry container service
• --restart=always: This is the restart strategy. If the container exits abnormally, it will automatically restart the container.
• --name docker-registry: Create a container named docker-registry. You can name it anything you want.
• Registry: the image that was pulled

The above shows that the registry image has been created and the docker-registry container has been started successfully. Visit: http://139.9.40.41:5000/v2/_catalog, the response result is as follows:

{"repositories":[]}

The above response result shows that there is no image in the Docker private repository.

By default, docker-registry only allows https to submit images. The following configuration enables docker-registry to support http. Under /etc/docker, create a daemon.json file and write:

{ 
 "insecure-registries": [ "139.9.40.41:5000"]
}

3. Restart Docker

systemctl restart docker

4. Upload the image to a private warehouse

Mark this image as a private repository image

docker tag docker.io/hello-world 139.9.40.41:5000/hello-world:v1

Upload a tagged image

docker push 139.9.40.41:5000/hello-world:v1 

List all images

[root@2 docker]# curl http://139.9.40.41:5000/v2/_catalog
{"repositories":["hello-world"]}

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.