SpringCloud教程第14篇:Consule

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:

  • 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

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$ 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:
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:

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<?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:

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@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:

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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



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

请我吃🍗