Public registry, docker hub

Private registry, ECR (AWS), ACR (Azure), GCR (Google)

Local registry

registryDomain/imageName:Tag
 
Docker Hub
docker.io/library/imageName:Tag
or
imageName:Tag
        

docker login # login Docker Hub
docker login [domainName] # login a private registry
        

ECR

• One registry for one app
• Different versions of the same app are deposited in the same registry

# start a local registry
docker run -d -p 5000:5000 --restart=always --name registry registry:2
 
# push image
docker tag redis localhost:5000/redis
docker push localhost:5000/redis
 
# pull image
docker pull localhost:5000/redis
 
# list images on local registry
http://localhost:5000/v2/_catalog
        

Compose file contains images from multiple registries

version: "3.9"  # optional since v1.27.0
services:
  mysqlserver:
    image: [privateRegistry]/mysql:8 # pull from a private registry
    volumes:
      - type: volume
        source: sandbox-home
        target: /var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=root
  phpmyadmin:
    image: phpmyadmin/phpmyadmin # pull from Docker Hub
    ports:
      - 8080:80
    environment:
      - PMA_HOST=mysqlserver
volumes:
  sandbox-home:
        

Login registries

# ~/.docker/config.json
{
	"auths": {
		"https://index.docker.io/v1/": {},
		"[privateRegistry]": {}
	},
	"credsStore": "desktop"
}
        

Using a Private Docker Registry

Deploy a Registry Server