基于spring-cloud-eureka 服务中心与注册

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/Little_Matches/article/details/84112335

本文基于Finchley.SR2以上,Edgware.SR5的配置部分不适用
spring-boot版本为2.0.2RELEASE, 用部分设置1.5已不适用

服务器端设置

服务器pom文件设置

加入依赖 spring-cloud-starter-netflix-eureka-server

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>jar</packaging>
    <artifactId>eureka-server</artifactId>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <file.encoding>UTF8</file.encoding>
        <spring-cloud.version>Finchley.SR2</spring-cloud.version>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
    </parent>

    <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>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

加入@EurekaServer,开启为注册服务中心

package top.littlematch.eureka;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args){
        SpringApplication.run(EurekaServerApplication.class, args);
    }

}

配置文件

#服务端口
server.port=8881
#名称
spring.application.name=server-eureka
#服务名称
eureka.instance.hostname=server-eureka
#eureka是一个高可用的组件，它没有后端缓存，每一个实例注册之后需要向注册中心发送心跳（因此可以在内存中完成），
# 在默认情况下eureka server也是一个eureka client
# 通过eureka.client.registerWithEureka：false和fetchRegistry：false来表明自己是一个eureka server

#禁止本身注册
eureka.client.register-with-eureka=false
#禁止本身注册
eureka.client.fetch-registry=false
#服务中心地址
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/

访问浏览器 http://localhost:8881/
查看注册中心

客户端设置

客户端pom文件设置

增加spring-cloud-starter-netflix-eureka-client，注册为eureka客户端；

为了测试方便加入spring-boot-starter-web与spring-boot-starter-test

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>jar</packaging>
    <artifactId>eureka-server</artifactId>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <file.encoding>UTF8</file.encoding>
        <spring-cloud.version>Finchley.SR2</spring-cloud.version>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
    </parent>

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

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

客户端启动类设置

加入@EnableEurekaClient注册为eureka客户端，加入@RestController用于客户端测试

package top.littlematch.eureka;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableEurekaClient
@RestController
public class EurekaClientApplication {
    public static void main(String[] args){
        SpringApplication.run(EurekaClientApplication.class, args);
    }

    @RequestMapping(value = "hello")
    public String hello(String name){
        return "hello! " + name;
    }
}

客户端配置文本设置

server.port=8882
spring.application.name=eureka-client
#注册到eureka-server，端口是服务端端口
eureka.client.service-url.defaultZone=http://localhost:8881/eureka/

访问浏览器
http://localhost:8882/hello?name=match

返回

hello! match

修改eureka-client的端口为8883，然后再启动一个，然后就可以得到多个服务了,同时实现了负载均衡