docker swarm部署eureka

基础服务独立部署

把所有服务一次性部署好非常方便，但是在生产环境中使用的时候需要考虑这样一些因素：

在生产环境中的基础服务，如Eureka由于更新不频繁，应该和频繁更新应用服务分开部署
作为基础服务的Eureka需要考虑高可用

我们可以把部署描述文件分成两部分，eureka.yml 用来部署作为基础服务的Eureka Server，是包含三各节点的集群。

1	我们可以把部署描述文件分成两部分，eureka.yml 用来部署作为基础服务的Eureka Server，是包含三各节点的集群。

eureka.yml

version: '3'
services:
  eureka1:
    image: binblee/demo-eurekaserver
    networks:
      springcloud-overlay:
        aliases:
          - eureka
    ports:
      - "8761:8761"
    environment:
      - ADDITIONAL_EUREKA_SERVER_LIST=http://eureka2:8761/eureka/,http://eureka3:8761/eureka/

  eureka2:
    image: binblee/demo-eurekaserver
    networks:
      springcloud-overlay:
        aliases:
          - eureka
    ports:
      - "8762:8761"
    environment:
      - ADDITIONAL_EUREKA_SERVER_LIST=http://eureka1:8761/eureka/,http://eureka3:8761/eureka/

  eureka3:
    image: binblee/demo-eurekaserver
    networks:
      springcloud-overlay:
        aliases:
          - eureka
    ports:
      - "8763:8761"
    environment:
      - ADDITIONAL_EUREKA_SERVER_LIST=http://eureka1:8761/eureka/,http://eureka3:8761/eureka/
 
networks:
  springcloud-overlay:
    external:
      name: springcloud-overlay

version: '3'

services:

eureka1:

image: binblee/demo-eurekaserver

networks:

springcloud-overlay:

aliases:

- eureka

ports:

- "8761:8761"

environment:

- ADDITIONAL_EUREKA_SERVER_LIST=http://eureka2:8761/eureka/,http://eureka3:8761/eureka/

eureka2:

image: binblee/demo-eurekaserver

networks:

springcloud-overlay:

aliases:

- eureka

ports:

- "8762:8761"

environment:

- ADDITIONAL_EUREKA_SERVER_LIST=http://eureka1:8761/eureka/,http://eureka3:8761/eureka/

eureka3:

image: binblee/demo-eurekaserver

networks:

springcloud-overlay:

aliases:

- eureka

ports:

- "8763:8761"

environment:

- ADDITIONAL_EUREKA_SERVER_LIST=http://eureka1:8761/eureka/,http://eureka3:8761/eureka/

networks:

springcloud-overlay:

external:

name: springcloud-overlay

Eureka部署到的网络springcloud-overlay需要手动创建，命令如下：

docker network create -d overlay springcloud-overlay

1	docker network create -d overlay springcloud-overlay

从部署模版中可以看出这三个Eureka实例在网络上的别名(alias)都是eureka，对于客户端可以在配置文件中指定这个别名即可，不必指定三个示例的名字。

application.yml

eureka.client.serviceUrl.defaultZone=http://${EUREKA_SERVER_ADDRESS}:8761/eureka/

1	eureka.client.serviceUrl.defaultZone=http://${EUREKA_SERVER_ADDRESS}:8761/eureka/

Eureka Server的地址通过${EUREKA_SERVER_ADDRESS} 环境变量传入

ervices:
  web:
    image: binblee/demo-web
    ...
    environment:
      - EUREKA_SERVER_ADDRESS=eureka

ervices:

web:

image: binblee/demo-web

...

environment:

- EUREKA_SERVER_ADDRESS=eureka

另外要注意的是所有依赖于Eureka的应用服务都要挂到springcloud-overlay网络上，否则无法和Eureka Server通信。下面是比较完整的部署描述文件的示例：

version: '3'
services:
  web:
    image: binblee/demo-web
    networks:
      - springcloud-overlay
    environment:
      - EUREKA_SERVER_ADDRESS=eureka
    ports:
      - "8080"
 
  bookservice:
    image: binblee/demo-bookservice
    networks:
      - springcloud-overlay
    environment:
      - EUREKA_SERVER_ADDRESS=eureka
 
networks:
  springcloud-overlay:
    external:
      name: springcloud-overlay

version: '3'

services:

web:

image: binblee/demo-web

networks:

- springcloud-overlay

environment:

- EUREKA_SERVER_ADDRESS=eureka

ports:

- "8080"

bookservice:

image: binblee/demo-bookservice

networks:

- springcloud-overlay

environment:

- EUREKA_SERVER_ADDRESS=eureka

networks:

springcloud-overlay:

external:

name: springcloud-overlay

部署这几个服务需要3个步骤，首先创建overlay网络，然后部署Eureka，最后再部署应用服务。命令如下：

docker network create -d overlay springcloud-overlay
cd compose/
docker stack deploy -c eureka.yml
docker stack deploy -c demoweb.yml

docker network create -d overlay springcloud-overlay

cd compose/

docker stack deploy -c eureka.yml

docker stack deploy -c demoweb.yml

本文固定链接: https://www.yoyoask.com/?p=3353
转载请注明: shooter 2019年05月25日于 SHOOTER 发表

最后编辑：2020-05-25

作者：shooter

这个作者貌似有点懒，什么都没有留下。

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