开发机上如何高效的使用swarm

swarm是docker自带的轻量级的集群管理工具。

几个主要的命令：

• docker swarm # 操作跟集群相关的东东
• docker node # 操作跟节点相关的东东
  • docker node ls
• docker service # 操作跟服务相关的东东
  • docker service create –replicas 3 -p 80:80 –name nginx nginx
  • docker service ls
  • docker service ps nginx
  • docker service logs nginx
  • docker service scale nginx=2
  • docker service scale nginx=5
  • docker service rm nginx

使用 docker-compose.yml 来启动服务

version: "3"

services:
  wordpress:
    image: wordpress
    ports:
      - 80:80
    networks:
      - overlay
    environment:
      WORDPRESS_DB_HOST: db:3306
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
    deploy:
      mode: replicated
      replicas: 3

命令 docker stack deploy -c docker-compose.yml wordpress