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原文链接地址：『中级篇』Docker-Stack部署投票应用（50）

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：https://github.com/limingios/docker/tree/master/No.5/labs/wordpress

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

version: "3"
services:redis:image: redis:alpineports:- "6379"networks:- frontenddeploy:replicas: 2update_config:parallelism: 2delay: 10srestart_policy:condition: on-failuredb:image: postgres:9.4volumes:- db-data:/var/lib/postgresql/datanetworks:- backenddeploy:placement:constraints: [node.role == manager]vote:image: dockersamples/examplevotingapp_vote:beforeports:- 5000:80networks:- frontenddepends_on:- redisdeploy:replicas: 2update_config:parallelism: 2restart_policy:condition: on-failureresult:image: dockersamples/examplevotingapp_result:beforeports:- 5001:80networks:- backenddepends_on:- dbdeploy:replicas: 1update_config:parallelism: 2delay: 10srestart_policy:condition: on-failureworker:image: dockersamples/examplevotingapp_workernetworks:- frontend- backenddeploy:mode: replicatedreplicas: 1labels: [APP=VOTING]restart_policy:condition: on-failuredelay: 10smax_attempts: 3window: 120splacement:constraints: [node.role == manager]visualizer:image: dockersamples/visualizer:stableports:- "8080:8080"stop_grace_period: 1m30svolumes:- "/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.yml
docker stack ls
docker stack services example

• 打开网页
  http://172.28.128.3:5000/
  http://172.28.128.3:5001/
  http://172.28.128.3:8080/

• 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。