zone-baoan: http://eureka18884.com:18884/eureka/

Eureka-Luohu的Eureka Server配置文件

server:

port: 18882

spring:

application:

name: Eureka-Luohu

eureka:

instance:

hostname: eureka18882.com

client:

prefer-same-zone-eureka: true

register-with-eureka: true

region: shenzhen

availability-zones:

shenzhen: zone-luohu,zone-yantian,zone-nanshan,zone-baoan

fetch-registry: true

service-url:

zone-yantian: http://eureka18881.com:18881/eureka/

zone-luohu: http://eureka18882.com:18882/eureka/

zone-nanshan: http://eureka18883.com:18883/eureka/

zone-baoan: http://eureka18884.com:18884/eureka/

Eureka-Nanshan的Eureka Server配置文件

server:

port: 18883

spring:

application:

name: Eureka-Nanshan

eureka:

instance:

hostname: eureka18883.com

client:

prefer-same-zone-eureka: true

register-with-eureka: true

region: shenzhen

availability-zones:

shenzhen: zone-nanshan,zone-luohu,zone-yantian,zone-baoan

fetch-registry: true

service-url:

zone-yantian: http://eureka18881.com:18881/eureka/

zone-luohu: http://eureka18882.com:18882/eureka/

zone-nanshan: http://eureka18883.com:18883/eureka/

zone-baoan: http://eureka18884.com:18884/eureka/

Eureka-Baoan的Eureka Server配置文件

server:

port: 18884

spring:

application:

name: Eureka-Baoan

eureka:

instance:

hostname: eureka18884.com

client:

prefer-same-zone-eureka: true

register-with-eureka: true

region: shenzhen

availability-zones:

shenzhen: zone-baoan,zone-nanshan,zone-luohu,zone-yantian

fetch-registry: true

service-url:

zone-yantian: http://eureka18881.com:18881/eureka/

zone-luohu: http://eureka18882.com:18882/eureka/

zone-nanshan: http://eureka18883.com:18883/eureka/

zone-baoan: http://eureka18884.com:18884/eureka/

2.3 启动集群

依次启动集群中四个Eureka Server服务,等待集群之间稳定后,访问Eureka Server的Dashboard,此时在四台Eureka Server中的任意一台都可以看到相同的服务注册信息Instance currently registered with Eureka,以及DS Replicaes信息(这个不相同哦,不需要复制自己……),此时说明Eureka Server Cluster已经正常启动了。

2.4 服务注册

Eureka Server分区本质上除了达到高可用之外,最主要是为了给客户端提供最优的服务,以此来达到服务的最快响应。在Eureka Server中注册两个服务Server-01和Server-02,Server-01中metadata-map zone选择zone-yantian,Server-02中metadata-map zone选择zone-louhu。(注意两个服务的服务名均为Server)

Server-01配置文件

server:

port: 19991

spring:

application:

name: Server

eureka:

instance:

prefer-ip-address: true

metadata-map:

zone: zone-yantian

client:

region: shenzhen

availability-zones:

shenzhen: zone-yantian,zone-luohu,zone-nanshan,zone-baoan

service-url:

zone-yantian: http://eureka18881.com:18881/eureka/

zone-luohu: http://eureka18882.com:18882/eureka/

zone-nanshan: http://eureka18883.com:18883/eureka/

zone-baoan: http://eureka18884.com:18884/eureka/

fetch-registry: true

register-with-eureka: true

prefer-same-zone-eureka: true

Server-01中提供一个Rest Api端点

@RestController

@RequestMapping(“/zone”)

public class ZoneController {

@GetMapping

public String zone() {

return “Server zone-yantian”;

}

}

Server-02配置文件

server:

port: 19992

spring:

application:

name: Server

eureka:

instance:

prefer-ip-address: true

metadata-map:

zone: zone-luohu

client:

region: shenzhen

availability-zones:

shenzhen: zone-luohu,zone-yantian,zone-nanshan,zone-baoan

service-url:

zone-yantian: http://eureka18881.com:18881/eureka/

zone-luohu: http://eureka18882.com:18882/eureka/

zone-nanshan: http://eureka18883.com:18883/eureka/

zone-baoan: http://eureka18884.com:18884/eureka/

fetch-registry: true

register-with-eureka: true

prefer-same-zone-eureka: true

Server-02中提供一个Rest Api端点

@RestController

@RequestMapping(“/zone”)

public class ZoneController {

@GetMapping

public String zone() {

return “Server zone-luohu”;

}

}

此时访问Eureka dashboard可以看到Server 有两个实例注册到了Eureka Server Cluster中。

2.4 服务消费

创建一个服务消费者Consumer-01,用于测试服务调用分发的具体情况。

Consumer-01配置文件,其中指定metadata-map.zone为zone-luohu

server:

port: 17771

spring:

application:

name: Consumer-01

eureka:

instance:

prefer-ip-address: true

metadata-map:

zone: zone-luohu

client:

region: shenzhen

availability-zones:

shenzhen: zone-luohu,zone-yantian,zone-nanshan,zone-baoan

service-url:

zone-yantian: http://eureka18881.com:18881/eureka/

zone-luohu: http://eureka18882.com:18882/eureka/

zone-nanshan: http://eureka18883.com:18883/eureka/

zone-baoan: http://eureka18884.com:18884/eureka/

fetch-registry: true

register-with-eureka: true

prefer-same-zone-eureka: true

提供一个Rest Api访问端点:

@RestController

@RequestMapping(“/consumer”)

public class ZoneController {

@Autowired

private RestTemplate restTemplate;

@GetMapping

public String zone() {

return restTemplate.getForObject(“http://server/zone”, String.class);

}

}

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