SpringCloud框架之ZookeeperConsul服务注册与发现

Posted 2023-03-14 蛋饼吧

本笔记内容为尚硅谷SpringCloud框架开发Zookeeper、Consul部分

目录

SpringCloud整合Zookeeper

一、注册中心Zookeeper

二、服务提供者

1、新建Module

2、POM

3、YML

4、主启动类

5、Controller

6、启动8004注册进zookeeper

三、服务消费者

1、新建Module

2、POM

3、YML

4、主启动

5、业务类

Consul服务注册与发现

一、Consul简介

二、安装并运行Consul 

三、服务提供者

1、新建Module

2、POM

3、YML

4、主启动类

5、业务类Controller

验证测试

四、服务消费者

1、新建Module

2、POM

3、YML

4、主启动类 

5、配置Bean

6、Controller

验证测试

三个注册中心异同点

CAP

经典CAP图 

---

接上一条笔记【SpringCloud框架之Eureka服务注册与发现】_蛋饼吧的博客-CSDN博客

---

Eureka2.0停止更新了  https://github.com/Netflix/eureka/wiki

​

 SpringCloud整合Zookeeper代替Eureka

SpringCloud整合Zookeeper

一、注册中心Zookeeper

---

• zookeeper是一个分布式协调工具，可以实现注册中心功能
• 关闭Linux服务器防火墙后启动
• zookeeper服务器zookeeper服务器取代Eureka服务器，zk作为服务注册中心

二、服务提供者

---

1、新建Module

cloud-provider-payment8004

2、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>mscloud03</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8004</artifactId>


    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>$project.version</version>
        </dependency>
        <!-- SpringBoot整合zookeeper客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</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>
</project>

3、YML

#8004表示注册到zookeeper服务器的支付服务提供者端口号
server:
  port: 8004
#服务别名----注册zookeeper到注册中心名称
spring:
  application:
    name: cloud-provider-payment
  cloud:
    zookeeper:
      connect-string: 192.168.111.144:2181

4、主启动类

package com.atguigu.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 PaymentMain8004

    public static void main(String[] args)
    
        SpringApplication.run(PaymentMain8004.class,args);
    

5、Controller

package com.atguigu.springcloud.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.beans.factory.annotation.Value;

import java.util.UUID;

@RestController
public class PaymentController

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

    @RequestMapping(value = "/payment/zk")
    public String paymentzk()
    
        return "springcloud with zookeeper: "+serverPort+"\\t"+ UUID.randomUUID().toString();
    

6、启动8004注册进zookeeper

启动后问题

​

解决zookeeper版本jar包冲突问题 

​

排出zk冲突后的新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>mscloud03</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8004</artifactId>


    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>$project.version</version>
        </dependency>
        <!-- SpringBoot整合zookeeper客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--先排除自带的zookeeper3.5.3-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--添加zookeeper3.4.9版本-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.9</version>
        </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>
</project>

 

 测试

​

测试2

​

服务节点是临时节点

三、服务消费者

---

1、新建Module

cloud-consumerzk-order80

2、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>mscloud</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumerzk-order81</artifactId>


    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合zookeeper客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--先排除自带的zookeeper-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--添加zookeeper3.4.9版本-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.9</version>
        </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>
</project>

3、YML

server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  cloud:
  #注册到zookeeper地址
    zookeeper:
      connect-string: 192.168.111.144:2181

4、主启动

package com.atguigu.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class OrderZK80

    public static void main(String[] args)
    
        SpringApplication.run(OrderZK80.class,args);
    

5、业务类

配置Bean

config包下ApplicationContextBean.java

package com.atguigu.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;

/**
 * @auther zzyy
 * @create 2020-01-30 17:33
 */
@Configuration
public class ApplicationContextBean

    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate()
    
        return new RestTemplate();
    

Controller 

package com.atguigu.springcloud.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class OrderZKController

    public static final String INVOKE_URL = "http://cloud-provider-payment";

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping(value = "/consumer/payment/zk")
    public String paymentInfo()
    
        String result = restTemplate.getForObject(INVOKE_URL+"/payment/zk", String.class);
        System.out.println("消费者调用支付服务(zookeeper)--->result:" + result);
        return result;
    

验证测试

​

访问测试地址 

http://localhost/consumer/payment/zk

Consul服务注册与发现

一、Consul简介

---

What is Consul? | Consul | HashiCorp Developer

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

Spring Cloud Consul 具有如下特性： 

​

• 服务发现----提供HTTP和DNS两种发现方式。
• 健康监测----支持多种方式，HTTP、TCP、Docker、Shell脚本定制化
• KV存储----监控Key、Value的存储方式
• 多数据中心----Consul支持多数据中心
• 可视化Web界面

下载地址 Install | Consul | HashiCorp Developer 

文档 Spring Cloud Consul 中文文档 参考手册 中文版

二、安装并运行Consul 

---

官网安装说明 Deploy Consul server | Consul | HashiCorp Developer

下载完成后只有一个consul.exe文件，硬盘路径下双击运行，查看版本号信息

使用开发模式启动

#cmd命令窗口执行命令

consul agent -dev

通过以下地址可以访问Consul的首页：http://localhost:8500 

结果页面

三、服务提供者

---

1、新建Module

支付服务：cloud-providerconsul-payment8006

2、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>mscloud</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-providerconsul-payment8006</artifactId>


    <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>

3、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

4、主启动类

package com.atguigu.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);
    

5、业务类Controller

package com.atguigu.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;

@RestController
public class PaymentController

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

    @GetMapping("/payment/consul")
    public String paymentInfo()
    
        return "springcloud with consul: "+serverPort+"\\t\\t"+ UUID.randomUUID().toString();
    

验证测试

四、服务消费者

---

1、新建Module

消费服务：cloud-consumerconsul-order80

2、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>mscloud</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumerconsul-order82</artifactId>


    <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>

3、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

4、主启动类 

package com.atguigu.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);
    

5、配置Bean

config包下ApplicationContextBean.java

package com.atguigu.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 ApplicationContextBean

    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate()
    
        return new RestTemplate();
    

6、Controller

package com.atguigu.springcloud.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class OrderConsulController

    public static final String INVOKE_URL = "http://cloud-provider-payment"; //consul-provider-payment

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping(value = "/consumer/payment/consul")
    public String paymentInfo()
    
        String result = restTemplate.getForObject(INVOKE_URL+"/payment/consul", String.class);
        System.out.println("消费者调用支付服务(consule)--->result:" + result);
        return result;
    

验证测试

访问测试地址：http://localhost/consumer/payment/consul

三个注册中心异同点

---

CAP

C:Consistency（强一致性）

A:Availability（可用性）

P:Partition tolerance（分区容错性）

CAP理论关注粒度是数据，而不是整体系统设计的策略

经典CAP图 

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：

CA - 单点集群，满足一致性，可用性的系统，通常在可扩展性上不太强大。

CP - 满足一致性，分区容忍必的系统，通常性能不是特别高。

AP - 满足可用性，分区容忍性的系统，通常可能对一致性要求低一些。

结束！