Consul 学习

Consul 学习

简介

• 官网：https://www.consul.io/
• 下载地址：https://www.consul.io/downloads
• 中文文档：https://www.springcloud.cc/spring-cloud-consul.html
• 代码地址：https://gitee.com/xueruiquan0613/cloud2020

安装

• 检测版本

consul --version

• 启动

consul agent -dev

• 访问Consul首页 — http://localhost:8500

使用

1. 服务提供者 — cloud-provider-consul-payment8006

• pom.xml

    <dependencies>
        <!-- SpringCloud consul-server-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.huiyuanai</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </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>
        <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>

• application.yml

#### consul 服务端口号
server:
  port: 8006

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

• 主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8006 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8006.class, args);
        System.out.println("PaymentMain8006 启动成功， ｡:.ﾟヽ(｡◕‿◕｡)ﾉﾟ.:｡+ﾟ");
    }
}

• 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();
     }
}

2. 服务消费者 — cloud-consumer-consul-order80

• pom.xml

    <dependencies>
        <!--SpringCloud consul-server-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.huiyuanai</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </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>
        <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>

• application.yml

server:
  port: 80
spring:
  application:
    name: consul-consumer-order
#### Consul 注册中心地址
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        service-name: ${spring.application.name}

• 主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class OrderConsulMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderConsulMain80.class, args);
        System.out.println("OrderMain80 启动成功， ｡:.ﾟヽ(｡◕‿◕｡)ﾉﾟ.:｡+ﾟ");
    }
}

• 配置类 — 负载均衡，RestTemplate模板

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

• controller

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

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