docker HA proxy test

docker-compose.yml

version: '2'
services:
  redis:
    image: redis
    ports:
        - "6379"
  web1:
    image: my_image:tag
    environment:
      - REDIS_URL=redis:6379
      - EXCLUDE_PORTS=7788
    links:
      - redis
  web2:
    image: my_image:tag
    environment:
      - REDIS_URL=redis:6379
      - EXCLUDE_PORTS=7788
    links:
      - redis
  web3:
    image: my_image:tag
    environment:
      - REDIS_URL=redis:6379
      - EXCLUDE_PORTS=7788
    links:
      - redis  
  lb:
    image: dockercloud/haproxy
    links:
      - web1
      - web2
      - web3
    environment:
      - DOCKER_TLS_VERIFY
      - DOCKER_HOST
      - DOCKER_CERT_PATH
      - STATS_PORT=1936
      - STATS_AUTH="auth:auth"
    volumes:
      - $DOCKER_CERT_PATH:$DOCKER_CERT_PATH
    ports:
      - 5566:80   # 透過 docker_ip:5566 可以連到 web app
      - 7788:1936 # 透過 docker_ip:7788 可以連到 haproxy 的 stats page