前置内容
(1)、微服务理论入门和手把手带你进行微服务环境搭建及支付、订单业务编写
(2)、SpringCloud之Eureka服务注册与发现
(3)、SpringCloud之Zookeeper进行服务注册与发现
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。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;同时它也支持跨平台。HTTP
和DNS
两种发现方式。HTTP
、TCP
、Docker
、Shell
脚本定制化。key
、Value
的存储方式。Consul
支持多数据中心exe
文件,所以我们只需要在其放置的目录下进行命令行操作即可。consul agent -dev
1. 操作本地访问测试之后的结果
1. 建Module
Module
的名称为cloud-providerconsul-payment8006
。2. 改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>cloud02</artifactId>
<groupId>com.xiao</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-providerconsul-payment8006</artifactId>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-consul-discovery -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-consul-discovery</artifactId>
</dependency>
<dependency>
<groupId>com.xiao</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
3. 改YML
server:
port: 8006
spring:
application:
name: consul-provider-payment
cloud:
consul:
host: localhost
port: 8500
discovery:
service-name: ${spring.application.name}
4. 主启动
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8006 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8006.class,args);
}
}
5. 业务类
import cn.hutool.core.lang.UUID;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@Slf4j
public class PaymentController {
@Value("${server.port}")
private String serverPort;
@GetMapping(value = "/payment/consul")
public String paymentConsul(){
return "springcloud with consul: "+serverPort+"\t"+ UUID.randomUUID().toString();
}
}
6. 测试结果
7. 包结构图示
1. 建Module
Module
的名称为cloud-consumerconsul-order80
。2. 改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>cloud02</artifactId>
<groupId>com.xiao</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-consumerconsul-order80</artifactId>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-consul-discovery -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-consul-discovery</artifactId>
</dependency>
<dependency>
<groupId>com.xiao</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
3. 改YML
server:
port: 80
spring:
application:
name: consul-consumer-order
cloud:
consul:
host: localhost
port: 8500
discovery:
service-name: ${spring.application.name}
4. 主启动
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class OrderConsulMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderConsulMain80.class,args);
}
}
5. 配置类
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ApplicationContextConfig {
@Bean
@LoadBalanced
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
6. 业务类
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@RestController
@Slf4j
public class OrderController {
public static final String URL = "http://consul-provider-payment";
@Autowired
private RestTemplate restTemplate;
@GetMapping("consumer/payment/consul")
public String paymentInfo(){
String result = restTemplate.getForObject(URL + "/payment/consul", String.class);
return result;
}
}
7. 测试结果
8. 包结构图示
组件名 | 语言 | CAP | 服务健康检查 | 对外暴露接口 | SpringCloud 集成 |
---|---|---|---|---|---|
Eureka | Java | AP | 可配支持 | HTTP | 已集成 |
Consul | Go | CP | 支持 | HTTP/DNS | 已集成 |
Zookeeper | Java | CP | 支持 | 客户端 | 已集成 |
CAP(C:Consistency(强一致性),A:Availability(可用性),P:Partition tolerance(分区容错))
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、分区容错性这三个需求。CAP
理论关注粒度是数据,而不是整体系统设计的策略1. AP架构(Eureka)
B
可以返回旧值,保证系统的可用性。AP
。2. CP架构
A
的要求,只满足一致性和分区容错,即CP
。版权说明 : 本文为转载文章, 版权归原作者所有 版权申明
原文链接 : https://blog.csdn.net/weixin_56727438/article/details/122354506
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