史上最简单的 SpringCloud 教程 | 第十四篇: 服务注册(consul)

转：https://blog.csdn.net/forezp/article/details/70245644

这篇文章主要介绍 spring cloud consul 组件，它是一个提供服务发现和配置的工具。consul具有分布式、高可用、高扩展性。

一、consul 简介

consul 具有以下性质：

1、服务发现：consul通过http 方式注册服务，并且服务与服务之间相互感应。
2、服务健康监测
3、key/value 存储
4、多数据中心

consul可运行在mac windows linux 等机器上。

二、consul安装

linux

$ mkdir -p $GOPATH/src/github.com/hashicorp && cd $!
$ git clone https://github.com/hashicorp/consul.git
$ cd consul
$ make bootstrap
$ make bootstrap

windows下安装：
见consul怎么在windows下安装：https://blog.csdn.net/forezp/article/details/70188595

三、构建工程

构建一个consul-miya的springboot工程，导入依赖pring-cloud-starter-consul-discovery，其依赖文件：

<?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.forezp</groupId><artifactId>consul-miya</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>consul-miya</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.2.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.cloud</groupId><artifactId>spring-cloud-starter-consul-discovery</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><scope>test</scope></dependency></dependencies><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><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

在其入口文件ConsulMiyaApplication加入注解@EnableDiscoveryClient，开启服务发现：

@SpringBootApplication
@EnableDiscoveryClient
@RestController
public class ConsulMiyaApplication {@RequestMapping("/hi")public String home() {return "hi ,i'm miya";}public static void main(String[] args) {new SpringApplicationBuilder(ConsulMiyaApplication.class).web(true).run(args);}
}

在其配置文件application.yml指定consul服务的端口为8500：

spring:cloud:consul:host: localhostport: 8500discovery:healthCheckPath: ${management.contextPath}/healthhealthCheckInterval: 15sinstance-id: consul-miyaapplication:name: consul-miya
server:port: 8502

启动工程，访问localhost:8500,可以发现consul-miya被注册了。

源码下载：
https://github.com/forezp/SpringCloudLearning/tree/master/chapter14

四、参考资料

HashiCorp/consul ： https://github.com/HashiCorp/consul

Spring Cloud Consul ： https://github.com/spring-cloud/spring-cloud-consul/blob/master/docs/src/main/asciidoc/spring-cloud-consul.adoc#install-consul

consul.io ： https://www.consul.io/docs/upgrading.html