Docker_registry.md

Docker Registry

The Registry is a stateless, highly scalable server side application that stores and lets you distribute Docker images. The Registry is open-source, under the permissive Apache license.

Why use it

You should use the Registry if you want to:

tightly control where your images are being stored fully own your images distribution pipeline integrate image storage and distribution tightly into your in-house development workflow

Docker Compose file to see the images into the registry

version: "3"
services:
  docker-registry:
    image: registry:2
    container_name: registry
    ports:
    - 5000:5000
    restart: always
    volumes:
    - ./docker-registry:/var/lib/registry

  docker-registry-ui:
    image: konradkleine/docker-registry-frontend:v2
    container_name: registry_ui
    ports:
    - 8080:80
    restart: always
    environment:
      ENV_DOCKER_REGISTRY_HOST: docker-registry
      ENV_DOCKER_REGISTRY_PORT: 5000

Run the docker compose file

docker-compose up -d  

Setup the insecure docker registry

vi /etc/docker/daemon.json

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

restart the Docker 

sudo systemctl stop docker

sudo systemctl start docker

Pull the image from docker hub and upload into the docker registry

1. Pull the image 

docker pull nginx 

2. update the tag for nginx image 

docker image tag nginx:latest ipaddress:5000/imagename_version

3. upload this image into the docker registry 

docker image push ipaddress:5000/imagename_version

4. Pull the image from docker registry 

docker pull ipaddress:5000/imagename_version