Springcloud整合Consul

x33g5p2x  于2021-10-16 转载在 Spring  
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Consul是什么

Consul是一套开源的分布式服务发现和配置管理系统,由HashiCorp 公司用Go语言开发.

提供了微服务系统中的服务治理、配置中心、控制总线等功能。这些功能中的每一个都可以根据需要单独使用,也可以一起使用以构建全方位的服务网格,总之Consul提供了一种完整的服务网格解决方案。

它具有很多优点。包括:基于raft协议,比较简洁;支持健康检查,同时支持HTTP和DNS协议支持跨数据中心的WAN集群提供图形界面跨平台,支持Linux、Mac、Windows。

Consul能干嘛

  • 服务发现 - 提供HTTP和DNS两种发现方式
  • 健康监测 - 支持多种方式,HTTP、TCP、Docker、Shell脚本定制化
  • KV存储 - Key、Value的存储方式
  • 多数据中心 - Consul支持多数据中心
  • 可视化Web界面

Consul操作指南

操作指南

Consul官网下载

Consul官网下载

Consul运行

windows版解压缩后,得consul.exe,打开cmd

  • 查看版本consul -v:

在当前Consul解压目录打开cmd窗口

执行命令

  • 开发模式启动consul agent -dev:

就在刚才打开的cmd界面输入即可

浏览器输入 - http://localhost:8500/ - 打开Consul控制页。

服务提供者注册进Consul

1.新建Module支付服务provider8006

2.POM

<?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>cloud_Parent</artifactId>
        <groupId>dhy.xpy</groupId>
        <version>520.521.finally</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>provider8006</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <!-- 引入自己定义的api通用包,可以使用Payment支付Entity -->
        <dependency>
            <groupId>dhy.xpy</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>520.521.finally</version>
        </dependency>
        <!--SpringCloud consul-server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <!-- SpringBoot整合Web组件 -->
        <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>
        <!--日常通用jar包配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>RELEASE</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

3.YML

###consul服务端口号
server:
  port: 8006

spring:
  application:
    name: consul-provider-payment
  ####consul注册中心地址
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        #hostname: 127.0.0.1
        service-name: ${spring.application.name}

4.主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8006
{
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8006.class, args);
    }
}

5.业务类Controller

@RestController
@Slf4j
public class PaymentController
{
    @Value("${server.port}")
    private String serverPort;

    @RequestMapping(value = "/payment/consul")
    public String paymentConsul()
    {
        return "springcloud with consul: "+serverPort+"\t "+ UUID.randomUUID().toString();
    }
}

6.验证测试

启动项目,访问对应controller写的请求,加上端口号

http://localhost:8006/payment/consul

http://localhost:8500 - 会显示provider8006

服务消费者注册进Consul

1.新建Module消费服务order80 - cloud-consumerconsul-order80

2.POM

<?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>cloud_Parent</artifactId>
        <groupId>dhy.xpy</groupId>
        <version>520.521.finally</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>consumerconsul-order80</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <!--SpringCloud consul-server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <!-- SpringBoot整合Web组件 -->
        <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>
        <!--日常通用jar包配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

3.YML

###consul服务端口号
server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  ####consul注册中心地址
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        #hostname: 127.0.0.1
        service-name: ${spring.application.name}

4.主启动类

@SpringBootApplication
@EnableDiscoveryClient //该注解用于向使用consul或者zookeeper作为注册中心时注册服务
public class OrderConsulMain80
{
    public static void main(String[] args) {
        SpringApplication.run(OrderConsulMain80.class, args);
    }
}

5.配置Bean

@Configuration
public class ApplicationContextConfig
{
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate()
    {
        return new RestTemplate();
    }
}

6.Controller

@RestController
@Slf4j
public class OrderConsulController
{
    public static final String INVOKE_URL = "http://consul-provider-payment";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping(value = "/consumer/payment/consul")
    public String paymentInfo()
    {
        String result = restTemplate.getForObject(INVOKE_URL+"/payment/consul",String.class);
        return result;
    }
}

7.验证测试

运行consul,cloud-providerconsul-payment8006,cloud-consumerconsul-order80

http://localhost:8500/ 主页会显示出consul,cloud-providerconsul-payment8006,cloud-consumerconsul-order80三服务。

8.访问测试地址 - http://localhost/consumer/payment/consul

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