Docker的使用心得

悠悠 2022-01-13 09:53 261阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

花了一个晚上和一个上午的时间学习了一下Docker，Docker的文档算是技术文档中写的最好的吧，有介绍，有操作，还有录像和回顾。

[https://docs.docker.com/get-started/][https_docs.docker.com_get-started]

下载Docker Toolbox(Docker Desktop for Windows Requires Microsoft Windows 10 Professional or Enterprise 64-bit.)

[https://docs.docker.com/toolbox/overview/][https_docs.docker.com_toolbox_overview]

Docker中各个概念的关系：

![be924edc5d5ad38dbca59bb03564d92b074.jpg][]

Toolbox启动之后，会在本机启动一个Node，拉取boot2docker的image，run一个container。

Docker的集群化部署最终落实在

docker stack deploy -c docker-compose.yml getstartedlab

可以看到getstartedlab为stack名，观察docker-compose.yml，该stack定义了多了service，service的名称为 <stack名>\_<service名>，如

getstartedlab\_web, getstartedlab\_visualizer, getstartedlab\_redis等:

![ce050616aac797a698c99ee6eb5fe1e35e6.jpg][]

每个service中定义了image的来源，部署的信息等。由于docker stack deploy指令在一个node中执行，服务会被部署在当前的node中（swarm的话，在Node Manager中执行docker stack deploy指令，服务会被部署在swarm的所有node中）。

version: "3"
    services:
      web:
        # replace username/repo:tag with your name and image details
        image: mozaiquan/get-started:part2
        deploy:
          replicas: 5
          restart_policy:
            condition: on-failure
          resources:
            limits:
              cpus: "0.1"
              memory: 50M
        # 端口映射 宿主机端口:虚拟机端口
        ports:
          - "80:80"
        networks:
          - webnet
      visualizer:
        image: dockersamples/visualizer:stable
        ports:
          - "8081:8080"
        volumes:
          - "/var/run/docker.sock:/var/run/docker.sock"
        deploy:
          placement:
            constraints: [node.role == manager]
        networks:
          - webnet
      redis:
        image: redis
        ports:
          - "6379:6379"
        volumes:
          - "/home/docker/data:/data"
        deploy:
          placement:
            constraints: [node.role == manager]
        command: redis-server --appendonly yes
        networks:
          - webnet
    networks:
      webnet:

一些常用指令：

docker stack ls  
 docker stack ps getstartedlab  
 docker service ls  
 docker service ps getstartedlab\_web  
 docker-machine ls  
 docker-machine env  
 docker-machine ssh myvm1 "docker node ls"  
 docker-machine env myvm1

![60d55e757fdc7c0d6c4d9f6cb83aca3a590.jpg][]

转载于:https://my.oschina.net/u/4042451/blog/3032022

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/121b3043fa47472986e4bec4d31e48eb.png
[https_docs.docker.com_get-started]: https://docs.docker.com/get-started/
[https_docs.docker.com_toolbox_overview]: https://docs.docker.com/toolbox/overview/
[be924edc5d5ad38dbca59bb03564d92b074.jpg]: /images/20220113/888cd26809044d28b8c5bc3d0fb83a40.png
[ce050616aac797a698c99ee6eb5fe1e35e6.jpg]: /images/20220113/97b582b094df4a4a9cba0bf7451faff1.png
[60d55e757fdc7c0d6c4d9f6cb83aca3a590.jpg]: /images/20220113/5ce320f667a144ba91ae6654719c0a60.png