spring-boot - 微服务( Eureka 客户端)未注册 Eureka 服务器/ Eureka 服务器未发现 Eureka 客户端

Question

Eureka 服务器设置

pom.xml

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
</dependencies>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

主要应用类

@SpringBootApplication
@EnableEurekaServer
public class DiscoveryServerApplication {

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

应用程序属性

server.port=8761
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

Eureka 客户端设置

pom.xml

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
</properties>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.3.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-netflix-eureka-client</artifactId>
</dependency>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

主要应用类

@SpringBootApplication
@EnableEurekaClient
public class CurrencyExchangeServiceApplication {

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

应用程序属性

server.port=8100
spring.application.name=currency-exchange-service

eureka.client.register-with-eureka=true
eureka.client.fetch-registry=true
eureka.client.serviceUrl.defaultZone=http://localhost:8761

我在eureka-server仪表板中没有看到在Eureka服务器注册的微服务-currency-exchange-service( http://localhost:8761)

为什么 Eureka 客户端没有注册到 Eureka 服务器？

@EnableDiscoveryClient 和 @EnableEurekaClient 一样吗？

Answer 1

我已经创建并使用您的配置进行了测试。发现( Eureka )客户端应用程序中不需要以下两行。

eureka.client.register-with-eureka=true
eureka.client.fetch-registry=true

请使用以下依赖项

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

代替

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-netflix-eureka-client</artifactId>
</dependency>

其实 register-with-eureka : false停止向发现( Eureka )服务器注册，因此将其从客户端应用程序中完全删除。

如果发现( Eureka )服务器端口不是 8761，请添加以下行。例如，

eureka.client.serviceUrl.defaultZone=http://localhost:9000