1.win10使用consul

a.官网下载地址

b.安装使用教程

c.使用方法

2.Linux使用consul

3.服务提供者子模块

a.pom

<dependencies>
    <!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
    <dependency>
        <groupId>com.atguigu.springcloud</groupId>
        <artifactId>cloud-api-commons</artifactId>
        <version>${project.version}</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>
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>RELEASE</version>
        <scope>test</scope>
    </dependency>
</dependencies>

b.applicaiton.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}

c.主启动

@SpringBootApplication
@EnableDiscoveryClient //用于zookeeper 和 consul 服务发现 
public class ConsulMain8006 {
    public static void main(String[] args) {
        SpringApplication.run(ConsulMain8006.class, args);
    }
}

d.流程代码

@RestController
public class PaymentController {

    @Value("${server.port}")
    private String serverPort;


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

4.消费者子模块

a.pom

<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>

b.applicaiton.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}

c.主启动

@SpringBootApplication
@EnableDiscoveryClient  //用于zookeeper 和 consul 服务发现 eureka消费者模块不用
public class OrderConsulMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderConsulMain80.class, args);
    }
}

d.开启负载均衡

@Configuration
public class ApplicationContextConfig {

    @Bean
    @LoadBalanced  //开启负载均衡
    public  RestTemplate getRestTemplate() {
        return new RestTemplate();
    }

}

e.流程代码

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

    @Resource
    private RestTemplate restTemplate;


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

5.总结

a. consul zookeeper eureka 区别

b.CAP

CAP理论关注粒度是数据，而不是整体系统设计。

c. consul zookeeper eureka 的CAP选型

最多只能同时较好的满足两个。

CAP理论的核心是：一个分布式系统不可能同时很好的满足一致性，可用性和分区容错性这三个需求，

因此，根据CAP 原理将NoSQL 数据库分成了满足CA原则、满足CP原则和满足AP原则三大类：