Consul is a service mesh solution providing a full featured control plane with service discovery, configuration, and segmentation functionality. Each of these features can be used individually as needed, or they can be used together to build a full service mesh. Consul requires a data plane and supports both a proxy and native integration model. Consul ships with a simple built-in proxy so that everything works out of the box, but also supports 3rd party proxy integrations such as Envoy. link
Consul是一个服务网格解决方案,它提供了一个功能齐全的控制平面,具有服务发现、配置和分段功能。这些特性中的每一个都可以根据需要单独使用,也可以一起用于构建全服务网格。Consul需要一个数据平面,并支持代理和本机集成模型。Consul船与一个简单的内置代理,使一切工作的开箱即用,但也支持第三方代理集成,如Envoy。
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。
直接下载最新的,上面有下载地址,下载后解压就一个文件
在当然路径进入CMD
consul.exe --version
Consul v1.10.1
Revision db839f18b
Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)
我的版本是最新的1.10.1
consul.exe agent -dev
http://localhost:8500
新建cloud-providerconsul-payment8006工程
<?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>com.dance.springcloud</artifactId>
<groupId>com.dance</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-providerconsul-payment8006</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<!-- dependent on common modules -->
<dependency>
<groupId>com.dance</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>1.0-SNAPSHOT</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>
</project>
###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: ${spring.application.name}
package com.dance.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8006 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8006.class, args);
}
}
package com.dance.springcloud.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.UUID;
@RestController
@Slf4j
public class PaymentController {
@Value("${server.port}")
private String serverPort;
@RequestMapping(value = "/payment/consul")
public String paymentConsul() {
return "springcloud with consul: " + serverPort + "\t " + UUID.randomUUID().toString();
}
}
测试成功~
新建cloud-consumerconsul-order80工程
<?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>com.dance.springcloud</artifactId>
<groupId>com.dance</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-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>
###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}
package com.dance.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@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);
}
}
package com.dance.springcloud.config;
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();
}
}
package com.dance.springcloud.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;
@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;
}
}
5. 浏览器测试
测试完成~
组件名 | 语言 | CAP | 服务健康检查 | 对外暴露接口 | Spring Cloud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 |
C:Consistency (强一致性)
A:Availability (可用性)
P:Partition tolerance (分区容错性)
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:
当网络分区出现后,为了保证可用性,系统B可以返回旧值,保证系统的可用性。
结论:违背了一致性C的要求,只满足可用性和分区容错,即AP
当网络分区出现后,为了保证一致性,就必须拒接请求,否则无法保证一致性。
结论:违背了可用性A的要求,只满足一致性和分区容错,即CP。
CP 与 AP 对立同一的矛盾关系。
到这里Consul就写完了~完结撒花
作者:彼岸舞
时间:2021\08\22
内容关于:Spring Cloud H版
本文属于作者原创,未经允许,禁止转发