docker services

部署app service

1. 编写docker-compose.yml 文件
   eg:

  version: "3"
  services:
    web:
      image: username/repository:tag
    deploy:
        replicas: 5 几个副本
        resources:
            limits:
               cpus: "0.1"
               memory: 50M
        restart_policy:
            condition: on-failure
    ports:
      - "80:80"
    networks:
      - webnet
networks:
  webnet:

• 初始化一下swarm
  docker swarm init

• 开始部署app 最后一个是app name
  docker stack deloy -c docker-compose.yml getstartedlab

• 查看容器下启动的app
  docker stack ps getstartedlab

• 关闭stack
  docker stack rm getstartedlab

缩放app

修改 replicas 参数 后需要重新部署，不需要把stack关闭或者删除容器 重新部署命名参考3