Eureka服务注册

简单描述一下springcloud的服务注册流程

1.搭建服务注册中心
pom.xml

<?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>

    <groupId>com.cfh</groupId>
    <artifactId>eureka-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>eureka-server</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Brixton.SR5</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </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>

开启服务注册中心(@EnableEurekaserver)

package com.cfh.eurekaserver;

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

//开启服务注册中心
@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {

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

配置properties.yaml

server:
  port: 1111

eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false #禁止注册中心注册自己
    fetch-registry: false #禁止注册中心检索服务
    serviceUrl:
      defaultzone: http://${eureka.instance.hostname}:${server.port}

2.向服务中心注册一个服务
1.创建一个服务

2.@EnableEurekaClient

package com.cfh.eurekarigister;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

//激活服务的DiscoveryClient实现
@EnableDiscoveryClient
@SpringBootApplication
public class EurekaRigisterApplication {

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

3 打印日志查看服务的注册情况

package com.cfh.eurekarigister.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    private final Logger logger = LoggerFactory.getLogger(HelloController.class);

    @Autowired
    private DiscoveryClient client;

    @RequestMapping("/hello")
    public String hello(){
        ServiceInstance instance = client.getLocalServiceInstance();
        logger.info("/hello,host:"+ instance.getHost() + ",serviceId:"+ instance.getServiceId());
        return "hello";
    }
}

4.修改application.yaml文件

#命名服务名称
spring:
  application:
    name: hello-service

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:1111/eureka #服务注册中心的地址