一、下载部署consul

1. docker部署consul

1. 部署命令

   docker run -d --name consul -p 8500:8500 consul

2. 查看是否部署成功，查询consul版本

   docker exec -it consul consul -version

2.官网下载

软件安装包下载

二、SpringCloud向consul中注册服务

1.引入库

     <!--consul注册jar包-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
         <!--健康检查、审计、统计和监控,用于springCloud心跳机制-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

2.完整pom文件内容

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>consul-servant2020</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>consul-servant2020</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2021.0.1</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--consul注册jar包-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
         <!--健康检查、审计、统计和监控,用于springCloud心跳机制-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <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>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

3.yml相关配置

server:
  port: 2021
spring:
  application:
    name: consul-consumer2021
  #consul注册中心地址
  cloud:
    consul:
      host: 192.168.87.128
      port: 8500
      discovery:
        service-name: ${spring.application.name}
        prefer-ip-address: true # 表示注册时使用IP而不是hostname

4.使用@EnableDiscoveryClient注解声明main方法

@SpringBootApplication
@EnableDiscoveryClient
public class ConsulServant2020Application {
    public static void main(String[] args) {
        SpringApplication.run(ConsulServant2020Application.class, args);
    }
}

5.RestTemplate配置

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

6.测试方法

@RestController
@RequestMapping("consulServantController")
public class ConsulServantController {
    @Value("${server.port}")
    String port;
    @Resource
    private RestTemplate restTemplate;
    /***
     * description: 提供消费信息
     * version: 1.0 ->
     * date: 2022/3/27 16:51
     * author: xiaYZ
     * iteration: 迭代说明
     * @param
     * @return java.lang.String
     */
    @RequestMapping("sendMessage")
    public String sendMessage(){
        return port + ":" + UUID.randomUUID();
    }
    private static final String INVOKE_URL = "http://consul-consumer2021";
    /**
     * description: 调佣consul-consumer2021服务中/consulConsumerController/sendMessage方法
     * version: 1.0
     * date: 2022/3/28 13:48
     * author: xiaYZ
     * iteration: 迭代说明
     * @param 
     * @return 
     */
    @GetMapping(value = "getMessage")
    public String getMessage() {
        return restTemplate.getForObject(INVOKE_URL + "/consulConsumerController/sendMessage", String.class);
    }
}

1.运行截图

1. 运行项目查询consul的UI界面
   
2. consul-servant2020服务调用consul-consumer2021中方法
   

总结

1. 引入jar包
2. 配置consul服务
3. 调用方法
   项目地址