Eureka Server 中的服务注册问题

Question

我在使用 Spring Eureka Server 启动注册表时遇到问题。发现服务已注册，另一个未注册。

我的application.yml发现如下，


spring:
  application:
    name: swimming-pool-discovery-client
server:
  port: 8761
eureka:
  client:
    registerWithEureka: true
    fetchRegistry: true
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  instance:
    preferIpAddress: true

注册服务application.yml如下。


spring:
  application:
    name: swimming-pool-reservation-service
server:
  port: 8181
eureka:
  client:
    registerWithEureka: true
    fetchRegistry: true
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  instance:
    preferIpAddress: true

发现pom.xml如下，

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <artifactId>discovery-service</artifactId>
    <properties>
        <java-version>1.8</java-version>
        <docker.image.prefix>swimming-pool</docker.image.prefix>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>0.4.13</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>build</goal>
                        </goals>
                        <phase>package</phase>
                    </execution>
                </executions>
                <configuration>
                    <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
                    <dockerDirectory>${basedir}/src/main/docker</dockerDirectory>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>

我的注册pom.xml如下，

<properties>
        <java-version>1.8</java-version>
        <docker.image.prefix>swimming-pool</docker.image.prefix>
    </properties>
    <artifactId>reservation-service</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>1.4.4.RELEASE</version>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>0.4.13</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>build</goal>
                        </goals>
                        <phase>package</phase>
                    </execution>
                </executions>
                <configuration>
                    <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
                    <dockerDirectory>${basedir}/src/main/docker</dockerDirectory>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>

Java 类是，

@EnableEurekaServer
@SpringBootApplication
public class DisoveryApplication {

    public static void main(String[] args) {
        SpringApplication.run(DisoveryApplication.class, args);
    }
}

@SpringBootApplication
@EnableDiscoveryClient
@EnableEurekaClient
public class ReservationApplication {

    public static void main(String[] args) {
        SpringApplication.run(ReservationApplication.class, args);
    }
}

我面临以下异常，

reservation-service_1  | 2018-04-17 14:26:36.428  WARN 1 --- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: java.net.ConnectException: Connection refused (Connection refused)
reservation-service_1  | 2018-04-17 14:26:36.429  WARN 1 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_SWIMMING-POOL-RESERVATION-SERVICE/d34463b43007:swimming-pool-reservation-service:8181 - registration failed Cannot execute request on any known server
reservation-service_1  |
reservation-service_1  | com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
reservation-service_1  |        at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111) ~[eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:798) ~[eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104) [eureka-client-1.6.2.jar!/:1.6.2]
reservation-service_1  |        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_111]
reservation-service_1  |        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_111]
reservation-service_1  |        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access1(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_111]
reservation-service_1  |        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_111]
reservation-service_1  |        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_111]
reservation-service_1  |        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_111]
reservation-service_1  |        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_111]
reservation-service_1  |
reservation-service_1  | 2018-04-17 14:26:36.430  WARN 1 --- [nfoReplicator-0] c.n.discovery.InstanceInfoReplicator     : There was a problem with the instance info replicator

任何帮助将不胜感激？

Answer 1

您的发现服务配置不正确。把你的 application.yml 改成这样

spring:
  application:
    name: swimming-pool-discovery-client
server:
  port: 8761
eureka:
  client:
    registerWithEureka: false
    fetchRegistry: false

您的注册服务配置正确。但是你不需要 @EnableDiscoveryClient 和 @EnableEurekaClient 两个都。只需使用 @EnableEurekaClient

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