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之前用docker-compose创建过投票应用，现在通过docker-stack来创建多机的部署。源码：

docker-compose文件

编辑docker-compose文件，从github下载下来。
这个配置文件里面装了一个可视化的配置工具visualizer:stable 可以查看到docker-swarm 所有的节点信息。

cd labs/cd example-vote-app/more docker-compose.yml ````* compose的语法![](https://upload-images.jianshu.io/upload_images/11223715-b0a26053d53c068f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)<div class="se-preview-section-delimiter"></div>``` bashversion: "3"services:  redis:    image: redis:alpine    ports:      - "6379"    networks:      - frontend    deploy:      replicas: 2      update_config:        parallelism: 2        delay: 10s      restart_policy:        condition: on-failure  db:    image: postgres:9.4    volumes:      - db-data:/var/lib/postgresql/data    networks:      - backend    deploy:      placement:        constraints: [node.role == manager]  vote:    image: dockersamples/examplevotingapp_vote:before    ports:      - 5000:80    networks:      - frontend    depends_on:      - redis    deploy:      replicas: 2      update_config:        parallelism: 2      restart_policy:        condition: on-failure  result:    image: dockersamples/examplevotingapp_result:before    ports:      - 5001:80    networks:      - backend    depends_on:      - db    deploy:      replicas: 1      update_config:        parallelism: 2        delay: 10s      restart_policy:        condition: on-failure  worker:    image: dockersamples/examplevotingapp_worker    networks:      - frontend      - backend    deploy:      mode: replicated      replicas: 1      labels: [APP=VOTING]      restart_policy:        condition: on-failure        delay: 10s        max_attempts: 3        window: 120s      placement:        constraints: [node.role == manager]  visualizer:    image: dockersamples/visualizer:stable    ports:      - "8080:8080"    stop_grace_period: 1m30s    volumes:      - "/var/run/docker.sock:/var/run/docker.sock"    deploy:      placement:        constraints: [node.role == manager]networks:  frontend:  backend:volumes:  db-data:

投票docker-stack 部署

docker stack deploy example --compose-file=docker-compose.ymldocker stack lsdocker stack services example

• 打开网页
  
  
  

• 扩展vote

docker service scale example_vote=4

• 删除stack

docker stack rm example

PS：docker stack 就介绍到这里吧，其实最关键的是编写docker-compose.yml查看官网的学习方式。对于本次编写的一些关键字建议看看官网学习下。

往期精彩