consul简介

一、consul 简介

consul 具有以下性质：

• 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。
• 服务健康监测
• key/value 存储
• 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

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windows下安装： 
见consul怎么在windows下安装

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：

<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>4.0.0modelVersion>

    <groupId>com.forezpgroupId>
    <artifactId>consul-miyaartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <packaging>jarpackaging>

    <name>consul-miyaname>
    <description>Demo project for Spring Bootdescription>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>1.5.2.RELEASEversion>
        <relativePath/> 
    parent>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <java.version>1.8java.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-consul-discoveryartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloudgroupId>
                <artifactId>spring-cloud-dependenciesartifactId>
                <version>Dalston.RELEASEversion>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>


project>

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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);
    }
}

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

spring:
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        healthCheckPath: ${management.contextPath}/health
        healthCheckInterval: 15s
        instance-id: consul-miya
  application:
    name: consul-miya
server:
  port: 8502

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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

Spring Cloud Consul

consul.io