创建docker-compose.yml

version: "3"
services:
  web:
    image: liusha/friendlyhello:v1.0
    deploy:
      replicas: 5
      resources:
        limits:
          cpus: "0.1"
          memory: 50M
      restart_policy:
        condition: on-failure
    ports:
      - "4000:80"
    networks:
      - webnet
networks:
  webnet:

初始化swarm

$ docker swarm init

Swarm initialized: current node (oltl3wf8xd1tar2nmvbwa5gms) is now a manager.

运行应用

$ docker stack deploy -c docker-compose.yml getstartedlab

Creating network getstartedlab_webnet
Creating service getstartedlab_web

查看服务的task

docker service ps getstartedlab_web

可以修改docker-compose.yml 中的replicas 值

docker stack deploy -c docker-compose.yml getstartedlab

关闭服务

docker stack rm getstartedlab

关闭swarm

docker swarm leave --force

【参考】

1。docker：快速入门：https://docs.docker.com/get-started/part3