Consul 微服务注册与发现

1. 创建Spring Boot项目

IDE ：IntelliJ IDEA

File ->new->project->Spring Initializer 创建Spring Boot项目

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.example</groupId>    <artifactId>consul_demo</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>jar</packaging>    <name>consul_demo</name>    <description>Demo project for Spring Boot</description>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.8.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>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-websocket</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter</artifactId>            <exclusions>                <exclusion>                    <groupId>org.springframework.boot</groupId>                    <artifactId>spring-boot-starter-logging</artifactId>                </exclusion>            </exclusions>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-log4j2</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-actuator</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-consul-discovery</artifactId>            <version>1.2.1.RELEASE</version>        </dependency>        <dependency>            <groupId>com.corundumstudio.socketio</groupId>            <artifactId>netty-socketio</artifactId>            <version>1.7.12</version>        </dependency>        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->        <dependency>            <groupId>org.apache.commons</groupId>            <artifactId>commons-lang3</artifactId>            <version>3.5</version>        </dependency>        <!-- https://mvnrepository.com/artifact/com.orbitz.consul/consul-client -->        <dependency>            <groupId>com.orbitz.consul</groupId>            <artifactId>consul-client</artifactId>            <version>0.16.3</version>        </dependency>        <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->        <dependency>            <groupId>redis.clients</groupId>            <artifactId>jedis</artifactId>            <version>2.8.0</version>        </dependency>        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>fastjson</artifactId>            <version>1.2.37</version>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build></project>

2. Controller

package com.example.demo.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;import java.util.HashMap;import java.util.Map;/** * Created by zxl on 17-10-22. */@RestController@RequestMapping("/api")public class HttpController {    /**     * 健康检查     * @return     */    @RequestMapping("/healthCheck")    public Object healthCheck() {        return "success";    }    /**     * 服务接口     * @return     */    @RequestMapping("/hello")    @ResponseBody    public Object service() {        return "hello";    }}

3. application.properties

spring.application.name=consul_demoserver.port=8080spring.cloud.consul.host=localhostspring.cloud.consul.port=8500spring.cloud.consul.enabled=truespring.cloud.consul.discovery.enabled=true#spring.cloud.consul.discovery.instanceId=${spring.application.name}//微服务名称spring.cloud.consul.discovery.serviceName=consulServiceTestspring.cloud.consul.discovery.hostname=http://${spring.cloud.consul.host}/api//健康检查spring.cloud.consul.discovery.healthCheckUrl=http://${spring.cloud.consul.host}/api/healthCheckspring.cloud.consul.discovery.healthCheckInterval=10sspring.cloud.consul.discovery.tags=dev

4. consul启动

进入consul目录执行如下脚本

consul_start.sh

export node=`hostname`killall -9 consul./consul agent  -data-dir /software/consul -node=$node -bind=192.xx.xxx.xx(本机Ip)  -join=192.yy.yy.yy(consul Server Ip)

5. 启动程序

执行main方法

package com.example.demo;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.client.discovery.EnableDiscoveryClient;@EnableDiscoveryClient@SpringBootApplicationpublic class ConsulDemoApplication {    public static void main(String[] args) {        SpringApplication.run(ConsulDemoApplication.class, args);    }}

6. 服务发现

public class ConsulUtil {    static Consul consul = Consul.builder().withHostAndPort(            HostAndPort.fromString(PropertyUtils.getProperty("ConsulServerIp"))).build();    public static Consul getConsul() {        return consul;    }    public static String getService(String serviceName, String tag) {        String address = null;        Consul consul = ConsulUtil.getConsul();        HealthClient healthClient = consul.healthClient();        ConsulResponse<List<ServiceHealth>> allHealthyServiceInstance                = healthClient.getHealthyServiceInstances(serviceName);        //获取健康的服务        List<ServiceHealth> response = allHealthyServiceInstance.getResponse();        List<Service> services = new ArrayList<>(response.size());        for (ServiceHealth serviceHealth : response) {            services.add(serviceHealth.getService());        }        Random random = new Random();        if (services.size() == 0) {//无法获取健康的服务            return null;        }        address = services.get(random.nextInt(services.size())).getAddress() + "/" + tag;        return address;    }}