配置 Docker 镜像下载的本地 mirror 服务

$ sudo wget -qO- https://get.docker.com/ | sh

$ sudo pip install docker-compose

# This compose file will start 2 containers: registry and redis.
# registry container will listen on host port 5000,
# and depend on the redis container as the cache scheme.


registry:
    image: registry:latest
    cpu_shares: 10
    environment:
        - STANDALONE=false
        - MIRROR_SOURCE=https://registry-1.docker.io
        - MIRROR_SOURCE_INDEX=https://index.docker.io
        - CACHE_REDIS_HOST=redis
        - CACHE_REDIS_PORT=6379
        - DEBUG=false
    hostname: docker-registry
    links:
        - redis:redis
    mem_limit: 512m
    ports:
        - "5000:5000"
    privileged: false
    restart: always
    user: root
    volumes:
        - /opt/data/registry:/tmp/registry

redis:
    image: redis:3.0
    cpu_shares: 10
    expose:
        - "6379"
    mem_limit: 512m
    restart: always
    volumes:
        - /opt/data/redis:/data

$ docker-compose up -d

DOCKER_OPTS="$DOCKER_OPTS --registry-mirror http://localmirror:5000"

$ sudo service docker restart