linux--docker(docker三剑客 docker-swarm)

实验：swarm做集群管理

负载均衡

server1:

docker-compose down        清除以前的记录

server2 server3:

server2 server3加入集群

让三台机器都可以快速的上网拉取镜像

三个容器都拉取到镜像

加个监控

部署成功

弹性伸缩

新的节点依然加入负载均衡

滚动更新

数据卷挂载(用stack部署)

version: "3.7"
services:

  myapp:
    image: ikubernetes/myapp:v1
    networks:
      - mynet
    ports:
      - "80:80"
    deploy:
      replicas: 3                个数
      update_config:
        parallelism: 2
        delay: 5s
      restart_policy:
        condition: on-failure

networks:
  mynet:

更新到6个

加个卷：

version: "3.7"
services:

  myapp:
    image: ikubernetes/myapp:v1
    networks:
      - mynet
    ports:
      - "80:80"
    volumes:
      - webdata:/usr/share/nginx/html
    deploy:
      replicas: 6
      update_config:
        parallelism: 2
        delay: 5s
      restart_policy:
        condition: on-failure

networks:
  mynet:

volumes:
  webdata:

卷没同步

实现负载均衡

手动同步

资源限制

vim docker-compose.yml

version: "3.7"
services:

  myapp:
    image: ikubernetes/myapp:v1
    networks:
      - mynet
    ports:
      - "80:80"
    volumes:
      - webdata:/usr/share/nginx/html
    deploy:
      replicas: 6
      update_config:
        parallelism: 2
        delay: 5s
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: '0.50'
          memory: 50M
        reservations:
          cpus: '0.25'
          memory: 20M
networks:
  mynet:

volumes:
  webdata:

搭建私有仓库

解析：

做reg.westos.org的解析

sevrer1:

[root@server1 harbor]# docker-compose down
[root@server1 harbor]# docker-compose up -d

在没网的情况下试试能否下载

version: "3.7"
services:

  myapp:
    image: myapp:v1
    networks:
      - mynet
    ports:
      - "8000:80"
    deploy:
      replicas: 3
      update_config:
        parallelism: 2
        delay: 5s
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: '0.50'
          memory: 50M
        reservations:
          cpus: '0.25'
          memory: 20M
networks:
  mynet:

利用图形化界面管理