DOcker-Compose 简单使用

# 方法一：
curl -L https://get.daocloud.io/docker/compose/releases/download/1.29.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

# 方法二：使用pip安装，版本可能比较旧
$ yum install python-pip python-dev
$ pip install docker-compose

# 方法三：作为容器安装
$ curl -L https://github.com/docker/compose/releases/download/1.25.5/run.sh > /usr/local/bin/docker-compose
$ chmod +x /usr/local/bin/docker-compose

# 方法四：离线安装
# 下载[docker-compose-Linux-x86_64](https://github.com/docker/compose/releases/download/1.8.1/docker-compose-Linux-x86_64)，然后重新命名添加可执行权限即可：
$ mv docker-compose-Linux-x86_64 /usr/local/bin/docker-compose;
$ chmod +x /usr/local/bin/docker-compose
# 百度云地址： http://pan.baidu.com/s/1slEOIC1 密码: qmca
# docker官方离线地址：https://dl.bintray.com/docker-compose/master/

version: "3.8"
services:
  redis: # 服务名称
    image: redis:alpine # 使用的镜像
    ports:
      - "6379" # 指定的端口
    networks:
      - frontend # 使用的网络
    deploy:
      replicas: 2
      update_config:
        parallelism: 2
        delay: 10s
      restart_policy:
        condition: on-failure

  db:
    image: postgres:9.4
    volumes:
      - db-data:/var/lib/postgresql/data
    networks:
      - backend

  result:
    image: nginx
    ports:
      - "5001:80"
    networks:
      - backend
    depends_on:
      - db
    deploy:
      replicas: 1
      update_config:
        parallelism: 2
        delay: 10s
      restart_policy:
        condition: on-failure

  worker:
    image: nginx
    networks:
      - frontend
      - backend
    deploy:
      mode: replicated
      replicas: 1
      labels: [APP=VOTING]
      restart_policy:
        condition: on-failure
        delay: 10s
        max_attempts: 3
        window: 120s

networks:
  frontend:
  backend:
volumes:
  db-data: