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文章目录
1. 简介
Consul is a distributed service mesh to connect, secure, and configure services across any runtime platform and public or private cloud
- 服务注册中心,需要单独安装
2. Consul 安装
2.1 下载
以Windows为例,Linux可以参考同样文章
点击https://www.consul.io/downloads.html下载Consul,Windows平台是 consul.exe可执行文件
2.2 配置环境变量
将consul.exe文件所在的文件路径添加到Path中,以便在命令行中可以直接使用consul命令· 这里我放置的路径是:D:\java_install_tools,环境变量配置信息:
2.3 验证
命令行输入:consul、或者consul --version,出现以下结果:
2.4 启动
命令行输入以下命令:consul agent -dev
3. 代码实现
3.1涉及的模块
- consul-service:服务提供者
3.2 源代码
3.2.1 Github地址
https://github.com/andyChenHuaYing/spring-cloud-demo
3.3 consul-service
3.3.1整体步骤
1.pom.xml引入使用consul的依赖
2. application.yml指定consul服务注册中心地址以及健康检查endpoint
3. ConsulServiceApplication@EnableDiscoveryClient
注解开启使用注册中心功能
4. 查看consul注册中心自带的Web UI界面查看服务注册情况
3.3.2 pom文件添加依赖
<?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">
<parent>
<artifactId>spring-cloud-finchley-demo</artifactId>
<groupId>org.oscar.scd</groupId>
<version>1.0.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>consul-service</artifactId>
<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-actuator</artifactId>
</dependency>
</dependencies>
</project>
3.3.3 application.yml
spring:
application:
name: consul-service
cloud:
consul:
host: localhost
port: 8500
discovery:
health-check-interval: 10s
instance-id: consul-service
health-check-path: /actuator/health
server:
port: 8780
3.3.4 ConsulServiceApplication
package org.oscar.scd.consul.service;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@EnableDiscoveryClient
@SpringBootApplication
public class ConsulServiceApplication {
@Value("${spring.application.name}")
private String appName;
@RequestMapping("/appName")
public String getAppName() {
return this.appName;
}
public static void main(String[] args) {
SpringApplication.run(ConsulServiceApplication.class, args);
}
}
4. 验证
4.1 创建SpringBoot启动类
4.1.1 ConsulServiceApplication
最简单的方式创建一个Spring Boot启动类即可
4.2 启动SpringBoot启动类
ConsulServiceApplication
4.3 访问注册中心
访问:http://localhost:8500 查看服务注册信息
5. 思考
- 与eureka有什么不同
- 如何搭建HA
- 有哪些特性