Eureka整合Spring Cloud Config Native 模式，实现在线扩容

小灰灰 2023-05-31 02:48 11阅读 0赞

## 前言： ##

spring cloud eureka的高可用之在线扩容，只要结合上一节[Config Bus热刷新][Config Bus]，便轻松实现。先[奉上源码][Link 1]

## 实现步骤： ##

### 1. 一个eureka server 和一个eureka client ###

1.  **启动good-config-server模块，更改配置文件**

`eureka-client.yml`的配置设置如下

eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/ # one eureka server

`eureka-server-peer1.yml`配置如下

eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/ # one eureka server

1.  **执行`curl -X POST http://localhost:8888/actuator/bus-refresh`使上面更改生效**
2.  **启动good-eureka-server，profile=peer1**
3.  **启动good-eureka-client**
4.  **验证：**

good-spring-cloud git:(master) ✗ curl -i http://127.0.0.1:8761/query/eureka-server      
    { "defaultZone":"http://localhost:8761/eureka/"}
    good-spring-cloud git:(master) ✗ curl -i http://127.0.0.1:8081/query/eureka-server
    { "defaultZone":"http://localhost:8761/eureka/"}

### 2. 添加第二个eureka server ###

1.  **更改配置文件**

`eureka-client.yml`的配置设置如下

eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/,http://localhost:8762/eureka/ # two eureka server

`eureka-server-peer1.yml`配置如下

server:
      port: 8761
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8762/eureka/ # two eureka server

`eureka-server-peer2.yml`配置如下

server:
      port: 8762
    eureka:
      client:
        serviceUrl:
    	      defaultZone: http://localhost:8761/eureka/ # two eureka server

1.  **执行`curl -X POST http://localhost:8888/actuator/bus-refresh`使上面更改生效**
2.  **启动good-eureka-server，profile=peer2，这里面peer1不用动**
3.  **验证：**

➜  good-spring-cloud git:(master) ✗ curl -i http://127.0.0.1:8081/query/eureka-server       
    { "defaultZone":"http://localhost:8761/eureka/,http://localhost:8762/eureka/"}%
    ➜  good-spring-cloud git:(master) ✗ curl -i http://127.0.0.1:8761/query/eureka-server
    { "defaultZone":"http://localhost:8762/eureka/"}%
    ➜  good-spring-cloud git:(master) ✗ curl -i http://127.0.0.1:8762/query/eureka-server
    { "defaultZone":"http://localhost:8761/eureka/"}%

### 2. 添加第三个eureka server ###

1.  **更改配置文件**  
    `eureka-client.yml`的配置设置如下

eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/,http://localhost:8762/eureka/,http://localhost:8763/eureka/ # three eureka server

`eureka-server-peer1.yml`配置如下

server:
      port: 8761
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8762/eureka/,http://localhost:8763/eureka/ # three eureka server

`eureka-server-peer2.yml`配置如下

server:
      port: 8762
    eureka:
      client:
        serviceUrl:
    	      defaultZone: http://localhost:8761/eureka/,http://localhost:8763/eureka/ # three eureka server

`eureka-server-peer3.yml`配置如下

server:
      port: 8763
    eureka:
      client:
        serviceUrl:
    	      defaultZone: http://localhost:8761/eureka/,http://localhost:8762/eureka/ # three eureka server

1.  **执行`curl -X POST http://localhost:8888/actuator/bus-refresh`使上面更改生效**
2.  **启动good-eureka-server，profile=peer3，这里面peer1，peer2不用动**
3.  **验证：**

➜  good-spring-cloud git:(master) curl http://127.0.0.1:8081/query/eureka-server       
    { "defaultZone":"http://localhost:8761/eureka/,http://localhost:8762/eureka/,http://localhost:8763/eureka/"}%
    ➜  good-spring-cloud git:(master) curl http://127.0.0.1:8761/query/eureka-server       
    { "defaultZone":"http://localhost:8762/eureka/,http://localhost:8763/eureka/"}%
    ➜  good-spring-cloud git:(master) curl -i http://127.0.0.1:8762/query/eureka-server       
    { "defaultZone":"http://localhost:8761/eureka/,http://localhost:8763/eureka/"}%
    ➜  good-spring-cloud git:(master) curl -i http://127.0.0.1:8763/query/eureka-server
    { "defaultZone":"http://localhost:8761/eureka/,http://localhost:8762/eureka/"}%

## 结束语 ##

> 通过学习提高工作效率和质量，在学习中留点记录，方便日后回忆，记录之处过于随意，如有错误或不当之处，还请客官指正，相互学习！  
> 参考书籍：重新定义springcloud实战

[Config Bus]: https://blog.csdn.net/goodcto/article/details/102615901
[Link 1]: https://gitee.com/goodcto/good-spring-cloud/tree/master/good-eureka/good-eureka-1