构建Multi Zone Eureka Server实战

妖狐艹你老母 2021-07-25 02:52 426阅读 0赞

一 Eureka Server

1 application-zone1.yml

  1. server:
  2.   port: 8761
  3. spring:
  4.   application:
  5.     name: eureka-server
  6. eureka:
  7.   server:
  8.     waitTimeInMsWhenSyncEmpty: 0
  9.     enableSelfPreservation: false
  10.     remoteRegionUrlsWithName:
  11.       region-west: http://localhost:8763/eureka/
  12.   client:
  13.     register-with-eureka: true
  14.     fetch-registry: true
  15.     region: region-east
  16.     service-url:
  17.       zone1: http://localhost:8761/eureka/
  18.       zone2: http://localhost:8762/eureka/
  19.     availability-zones:
  20.       region-east: zone1,zone2
  21.   instance:
  22.     hostname: localhost
  23.     metadataMap.zone: zone1

2 application-zone2.yml 

  1. server:
  2.   port: 8762
  3. spring:
  4.   application:
  5.     name: eureka-server
  6. eureka:
  7.   server:
  8.     waitTimeInMsWhenSyncEmpty: 0
  9.     enableSelfPreservation: false
  10.     remoteRegionUrlsWithName:
  11.       region-west: http://localhost:8763/eureka/
  12.   client:
  13.     register-with-eureka: true
  14.     fetch-registry: true
  15.     region: region-east
  16.     service-url:
  17.       zone1: http://localhost:8761/eureka/
  18.       zone2: http://localhost:8762/eureka/
  19.     availability-zones:
  20.       region-east: zone1,zone2
  21.   instance:
  22.     hostname: localhost
  23.     metadataMap.zone: zone2

3 application-zone3-region-west.yml

  1. server:
  2.   port: 8763
  3. spring:
  4.   application:
  5.     name: eureka-server
  6. eureka:
  7.   server:
  8.     waitTimeInMsWhenSyncEmpty: 0
  9.     enableSelfPreservation: false
  10.     remoteRegionUrlsWithName:
  11.       region-east: http://localhost:8761/eureka/
  12.   client:
  13.     register-with-eureka: true
  14.     fetch-registry: true
  15.     region: region-west
  16.     service-url:
  17.       zone3: http://localhost:8763/eureka/
  18.       zone4: http://localhost:8764/eureka/
  19.     availability-zones:
  20.       region-west: zone3,zone4
  21.   instance:
  22.     hostname: localhost
  23.     metadataMap.zone: zone3

4 application-zone4-region-west.yml

  1. server:
  2.   port: 8764
  3. spring:
  4.   application:
  5.     name: eureka-server
  6. eureka:
  7.   server:
  8.     waitTimeInMsWhenSyncEmpty: 0
  9.     enableSelfPreservation: false
  10.     remoteRegionUrlsWithName:
  11.       region-east: http://localhost:8761/eureka/
  12.   client:
  13.     register-with-eureka: true
  14.     fetch-registry: true
  15.     region: region-west
  16.     service-url:
  17.       zone3: http://localhost:8763/eureka/
  18.       zone4: http://localhost:8764/eureka/
  19.     availability-zones:
  20.       region-west: zone3,zone4
  21.   instance:
  22.     hostname: localhost
  23.     metadataMap.zone: zone4

5 cn.springcloud.book.config.RegionConfig

  1. package cn.springcloud.book.config;
  4. import com.netflix.discovery.EurekaClientConfig;
  5. import com.netflix.eureka.EurekaServerConfig;
  6. import org.springframework.boot.autoconfigure.AutoConfigureBefore;
  7. import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
  8. import org.springframework.cloud.netflix.eureka.server.EurekaServerAutoConfiguration;
  9. import org.springframework.cloud.netflix.eureka.server.EurekaServerConfigBean;
  10. import org.springframework.context.annotation.Bean;
  11. import org.springframework.context.annotation.Configuration;
  14. import java.util.HashMap;
  15. import java.util.Map;
  18. /**
  19. * Created by caibosi on 2018-06-25.
  20. */
  21. @Configuration
  22. @AutoConfigureBefore(EurekaServerAutoConfiguration.class)
  23. public class RegionConfig {
  26.     @Bean
  27.     @ConditionalOnMissingBean
  28.     public EurekaServerConfig eurekaServerConfig(EurekaClientConfig clientConfig) {
  29.         EurekaServerConfigBean server = new EurekaServerConfigBean();
  30.         if (clientConfig.shouldRegisterWithEureka()) {
  31.             // Set a sensible default if we are supposed to replicate
  32.             server.setRegistrySyncRetries(5);
  33.         }
  34.         server.setRemoteRegionAppWhitelist(new HashMap<>());
  35.         return server;
  36.     }
  37. }

二 Eureka Client

1 application.yml

  1. management:
  2.   endpoints:
  3.     web:
  4.       exposure:
  5.         include: '*'

2 application-zone1.yml

  1. server:
  2.   port: 8071
  3. spring:
  4.   application.name: demo-client
  5. eureka:
  6.   client:
  7.     prefer-same-zone-eureka: true
  8.     region: region-east
  9.     service-url:
  10.       zone1: http://localhost:8761/eureka/
  11.       zone2: http://localhost:8762/eureka/
  12.     availability-zones:
  13.       region-east: zone1,zone2
  14.   instance:
  15.     metadataMap.zone: zone1

3 application-zone2.yml

  1. server:
  2.   port: 8072
  3. spring:
  4.   application.name: demo-client
  5. eureka:
  6.   client:
  7.     prefer-same-zone-eureka: true
  8.     region: region-east
  9.     service-url:
  10.       zone1: http://localhost:8761/eureka/
  11.       zone2: http://localhost:8762/eureka/
  12.     availability-zones:
  13.       region-east: zone1,zone2
  14.   instance:
  15.     metadataMap.zone: zone2

4 application-zone3.yml

  1. server:
  2.   port: 8073
  3. spring:
  4.   application.name: demo-client
  5. eureka:
  6.   client:
  7.     prefer-same-zone-eureka: true
  8.     region: region-west
  9.     service-url:
  10.       zone3: http://localhost:8763/eureka/
  11.       zone4: http://localhost:8764/eureka/
  12.     availability-zones:
  13.       region-west: zone3,zone4
  14.   instance:
  15.     metadataMap.zone: zone3

5 application-zone4.yml

  1. server:
  2.   port: 8074
  3. spring:
  4.   application.name: demo-client
  5. eureka:
  6.   client:
  7.     prefer-same-zone-eureka: true
  8.     region: region-west
  9.     service-url:
  10.       zone3: http://localhost:8763/eureka/
  11.       zone4: http://localhost:8764/eureka/
  12.     availability-zones:
  13.       region-west: zone3,zone4
  14.   instance:
  15.     metadataMap.zone: zone4

三 zuul-dateway

1 application.yml

  1. spring:
  2.   application:
  3.     name: zuul-gateway
  4. management:
  5.   endpoints:
  6.     web:
  7.       exposure:
  8.         include: '*'

2 application-zone1.yml

  1. server:
  2.   port: 10001
  3. eureka:
  4.   instance:
  5.     metadataMap.zone: zone1
  6.   client:
  7.     register-with-eureka: true
  8.     fetch-registry: true
  9.     region: region-east
  10.     service-url:
  11.       zone1: http://localhost:8761/eureka/
  12.       zone2: http://localhost:8762/eureka/
  13.     availability-zones:
  14.       region-east: zone1,zone2

3 application-zone3-region-west.yml

  1. server:
  2.   port: 10002
  3. eureka:
  4.   instance:
  5.     metadataMap.zone: zone3
  6.   client:
  7.     register-with-eureka: true
  8.     fetch-registry: true
  9.     region: region-west
  10.     service-url:
  11.       zone3: http://localhost:8763/eureka/
  12.       zone4: http://localhost:8764/eureka/
  13.     availability-zones:
  14.       region-west: zone3,zone4

四 组网

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五 启动

1 启动4个eureka Server

  1. mvn spring-boot:run -Dspring.profiles.active=zone1
  2. mvn spring-boot:run -Dspring.profiles.active=zone2
  3. mvn spring-boot:run -Dspring.profiles.active=zone3-region-west
  4. mvn spring-boot:run -Dspring.profiles.active=zone4-region-west

2 启动4个Eureka Client

  1. mvn spring-boot:run -Dspring.profiles.active=zone1
  2. mvn spring-boot:run -Dspring.profiles.active=zone2
  3. mvn spring-boot:run -Dspring.profiles.active=zone3
  4. mvn spring-boot:run -Dspring.profiles.active=zone4

3 启动2个Zuul Gateway

  1. mvn spring-boot:run -Dspring.profiles.active=zone1
  2. mvn spring-boot:run -Dspring.profiles.active=zone3-region-west

六 测试

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从上面的测试结果可以看到zoneAffinity特性，zone1的gateway访问的是zone1的demo-client，zone3的gateway访问的是zone3的demo-client

接下来，关闭zone1和zone2的Eureka Client，再通过zone1中的gateway访问demo-client，将路径到region-west的demo-client

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