docker-swarm容器集群

最近接手公司的一个项目，原先是用docker-swarm部署的，所以借此机会学习了一下docker-swarm中，是如何来部署服务的，以及不同容器之间是如何连接相同的网络来进行通信的。

1、部署服务

1）docker stack deploy

用法：docker stack deploy [OPTIONS] STACK，其中 -c 参数指定 compose 文件名

说明：docker stack deploy命令用于部署新的堆栈或更新现有堆栈。从群集中的compose文件或dab文件创建和更新堆栈，必须以管理员节点为目标运行此命令。

2）具体使用

在yaml文件所在的目录下，执行以下命令：

docker stack deploy -c docker-compose.yml example

部署的服务名称则以example_为前缀：example_SERVICE

下面是yaml文件

redis.yaml

 1 version: '3.6'
 2 services:
 3   wisdom-test-redis:
 4     image: 172.28.*.*/redis:5.0.3
 5     container_name: wisdom-test-redis
 6     ports:
 7     - 36379:6379
 8     volumes:
 9     - v2-test-redis-volumn:/data
10     command: redis-server --appendonly yes
11     deploy:
12       replicas: 1
13       restart_policy:
14         condition: on-failure
15 volumes:
16   v2-test-redis-volumn:
17     driver: local
18     driver_opts:
19       type: "nfs"
20       o: "addr=172.28.*.*,rw"
21       device: ":/data/www/codes/redis-test/data"
22 
23 networks:
24   wisdom-net:
25     driver: overlay

wisdom.yaml

 1 version: '3.6'
 2 services:
 3   wisdom:
 4     image: 172.28.*.*/php-swoole:7.4.6-1
 5     ports:
 6     - 9512:9501
 7     volumes:
 8     - app_backend:/easyswoole/
 9     command: ["php", "/easyswoole/vendor/easyswoole/easyswoole/bin/easyswoole", "start", "produce"]
10     configs:
11       - source: php_memory_ini
12         target: /usr/local/etc/php/conf.d/uploads.ini
13     deploy:
14       replicas: 2
15       placement:
16         constraints:
17           - node.role == manager
18       restart_policy:
19         condition: on-failure
20 volumes:
21   app_backend:
22     driver: local
23     driver_opts:
24       type: "nfs"
25       o: "addr=172.28.*.*,rw"
26       device: ":/data/www/codes/wisdom-v2-test"
27 
28 configs:
29   php_memory_ini:
30     external: true
31 
32 networks:
33   wisdom-net:
34     driver: overlay

举个栗子：

 1 $ docker stack deploy --compose-file docker-compose.yml vossibility
 2 
 3 Creating network vossibility_vossibility
 4 Creating network vossibility_default
 5 Creating service vossibility_nsqd
 6 Creating service vossibility_logstash
 7 Creating service vossibility_elasticsearch
 8 Creating service vossibility_kibana
 9 Creating service vossibility_ghollector
10 Creating service vossibility_lookupd