SpringCloud整合zookeeper

转x33g5p2x  于2021-10-16 转载在 Spring  
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前言

SpringCloud----环境搭建

SpringCloud—Eureka

支付服务注册进zookeeper

  • 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

用到的Linux命令行：

  • systemctl stop firewalld关闭防火墙
  • systemctl status firewalld查看防火墙状态
  • ipconfig查看IP地址
  • ping查验结果

zookeeper服务器取代Eureka服务器，zk作为服务注册中心

具体步骤

1.新建名为cloud-provider-payment8004的Maven工程。

2.POM

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5.     <parent>
  6.         <artifactId>cloud_Parent</artifactId>
  7.         <groupId>dhy.xpy</groupId>
  8.         <version>520.521.finally</version>
  9.     </parent>
  10.     <modelVersion>4.0.0</modelVersion>
  12.     <artifactId>dhy_cloud_provider_payment8004</artifactId>
  14.     <properties>
  15.         <maven.compiler.source>8</maven.compiler.source>
  16.         <maven.compiler.target>8</maven.compiler.target>
  17.     </properties>
  19.     <dependencies>
  20.         <!-- SpringBoot整合Web组件 -->
  21.         <dependency>
  22.             <groupId>org.springframework.boot</groupId>
  23.             <artifactId>spring-boot-starter-web</artifactId>
  24.         </dependency>
  25.         <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
  26.             <groupId>dhy.xpy</groupId>
  27.             <artifactId>cloud-api-commons</artifactId>
  28.             <version>520.521.finally</version>
  29.         </dependency>
  30.         <!-- SpringBoot整合zookeeper客户端 -->
  31.         <dependency>
  32.             <groupId>org.springframework.cloud</groupId>
  33.             <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
  34.         </dependency>
  35.         <dependency>
  36.             <groupId>org.springframework.boot</groupId>
  37.             <artifactId>spring-boot-devtools</artifactId>
  38.             <scope>runtime</scope>
  39.             <optional>true</optional>
  40.         </dependency>
  41.         <dependency>
  42.             <groupId>org.projectlombok</groupId>
  43.             <artifactId>lombok</artifactId>
  44.             <optional>true</optional>
  45.         </dependency>
  46.         <dependency>
  47.             <groupId>org.springframework.boot</groupId>
  48.             <artifactId>spring-boot-starter-test</artifactId>
  49.             <scope>test</scope>
  50.         </dependency>
  51.     </dependencies>
  53. </project>

3.YML

  1. #8004表示注册到zookeeper服务器的支付服务提供者端口号
  2. server:
  3.   port: 8004
  5. #服务别名----注册zookeeper到注册中心名称
  6. spring:
  7.   application:
  8.     name: cloud-provider-payment
  9.   cloud:
  10.     zookeeper:
  11.       #一个zookeeper机器的ip加端口号
  12.       connect-string: 192.168.112.128:2181

4.主启动类

  1. @SpringBootApplication
  2. //让注册中心能够发现，扫描到当前微服务
  3. //@EnableEurekaClient只适用于Eureka作为注册中心
  4. @EnableDiscoveryClient//该注解用于向使用consul或者zookeeper作为注册中心时注册服务
  5. public class PaymentMain8004
  6. {
  7.     public static void main(String[] args)
  8.     {
  9.         SpringApplication.run(PaymentMain8004.class, args);
  10.     }
  11. }

5.Controller

  1. @RestController
  2. @Slf4j
  3. public class PaymentController
  4. {
  5.     @Value("${server.port}")
  6.     private String serverPort;
  8.     @RequestMapping(value = "/payment/zk")
  9.     public String paymentzk()
  10.     {
  11.         return "springcloud with zookeeper: "+serverPort+"\t"+ UUID.randomUUID().toString();
  12.     }
  13. }

6.启动8004注册进zookeeper（要先启动zookeeper的server）

  • 验证测试：浏览器 - http://localhost:8004/payment/zk
  • 验证测试2 ：接着用zookeeper客户端操作

zk的客户端可以发现多个一个微服务节点上线

当前微服务节点的详细信息用JSON字符串封装来进行表示

通过JSON字符串格式化工具，可以得到下面的结果:

  1. {
  2.   "name": "cloud-provider-payment",
  3.   "id": "59fa22e6-d0e1-493a-ad03-85cb1ad4946d",
  4.   "address": "LAPTOP-PEE1UMNH",
  5.   "port": 8004,
  6.   "sslPort": null,
  7.   "payload": {
  8.     "@class": "org.springframework.cloud.zookeeper.discovery.ZookeeperInstance",
  9.     "id": "application-1",
  10.     "name": "cloud-provider-payment",
  11.     "metadata": {
  12.       
  13.     }
  14.   },
  15.   "registrationTimeUTC": 1634218867331,
  16.   "serviceType": "DYNAMIC",
  17.   "uriSpec": {
  18.     "parts": [
  19.       {
  20.         "value": "scheme",
  21.         "variable": true
  22.       },
  23.       {
  24.         "value": "://",
  25.         "variable": false
  26.       },
  27.       {
  28.         "value": "address",
  29.         "variable": true
  30.       },
  31.       {
  32.         "value": ":",
  33.         "variable": false
  34.       },
  35.       {
  36.         "value": "port",
  37.         "variable": true
  38.       }
  39.     ]
  40.   }
  41. }

ZooKeeper的服务节点是临时节点，并且当微服务一段时间没有发送心跳给zk,那zk就会将其踢出去

如果linux上面的zk是3.4+,而idea上面的默认引入的是3.5+，那么可能会出现jar包冲突问题，解决方法如下

  1. <!-- SpringBoot整合zookeeper客户端 -->
  2.         <dependency>
  3.             <groupId>org.springframework.cloud</groupId>
  4.             <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
  5.             <!--先排除自带的zookeeper3.5.3 防止与3.4.9起冲突-->
  6.             <exclusions>
  7.                 <exclusion>
  8.                     <groupId>org.apache.zookeeper</groupId>
  9.                     <artifactId>zookeeper</artifactId>
  10.                 </exclusion>
  11.             </exclusions>
  12.         </dependency>
  13.         <!--添加zookeeper3.4.9版本-->
  14.         <dependency>
  15.             <groupId>org.apache.zookeeper</groupId>
  16.             <artifactId>zookeeper</artifactId>
  17.             <version>3.4.9</version>
  18.         </dependency>

订单服务注册进zookeeper

1.新建cloud-consumerzk-order80

2.POM

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <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">
  3.     <parent>
  4.         <artifactId>cloud_Parent</artifactId>
  5.         <groupId>dhy.xpy</groupId>
  6.         <version>520.521.finally</version>
  7.     </parent>
  8.     <modelVersion>4.0.0</modelVersion>
  10.     <artifactId>dhy-cloud-consumerzk-order80</artifactId>
  12.     <properties>
  13.         <maven.compiler.source>8</maven.compiler.source>
  14.         <maven.compiler.target>8</maven.compiler.target>
  15.     </properties>
  17.     <dependencies>
  18.         <!-- SpringBoot整合Web组件 -->
  19.         <dependency>
  20.             <groupId>org.springframework.boot</groupId>
  21.             <artifactId>spring-boot-starter-web</artifactId>
  22.         </dependency>
  23.         <!-- SpringBoot整合zookeeper客户端 -->
  24.         <dependency>
  25.             <groupId>org.springframework.cloud</groupId>
  26.             <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
  27.         </dependency>
  28.         <dependency>
  29.             <groupId>org.springframework.boot</groupId>
  30.             <artifactId>spring-boot-devtools</artifactId>
  31.             <scope>runtime</scope>
  32.             <optional>true</optional>
  33.         </dependency>
  34.         <dependency>
  35.             <groupId>org.projectlombok</groupId>
  36.             <artifactId>lombok</artifactId>
  37.             <optional>true</optional>
  38.         </dependency>
  39.         <dependency>
  40.             <groupId>org.springframework.boot</groupId>
  41.             <artifactId>spring-boot-starter-test</artifactId>
  42.             <scope>test</scope>
  43.         </dependency>
  44.     </dependencies>
  45. </project>

3.YML

  1. server:
  2.   port: 80
  4. #服务别名----注册zookeeper到注册中心名称
  5. spring:
  6.   application:
  7.     name: cloud-consumer-order
  8.   cloud:
  9.     zookeeper:
  10.       connect-string: 192.168.112.128:2181

4.主启动

  1. @SpringBootApplication
  2. @EnableDiscoveryClient
  3. public class OrderZKMain80 {
  4.     public static void main(String[] args) {
  5.         SpringApplication.run(OrderZKMain80.class, args);
  6.     }
  7. }

5.业务类

  1. @Configuration
  2. public class ApplicationContextConfig
  3. {
  4.     @Bean
  5.     //使用@LoadBalanced注解赋予RestTemplate负载均衡的能力
  6.     @LoadBalanced
  7.     public RestTemplate getRestTemplate()
  8.     {
  9.         return new RestTemplate();
  10.     }
  11. }
  1. @RestController
  2. @Slf4j
  3. public class OrderZKController
  4. {
  5.     //zk上面微服务的名字
  6.     //通过 @LoadBalanced注解的拦截器拦截restTemplate实例对象发出的请求
  7.     //做服务名到ip的映射
  8.     public static final String INVOKE_URL = "http://cloud-provider-payment";
  10.     @Resource
  11.     private RestTemplate restTemplate;
  13.     @GetMapping(value = "/consumer/payment/zk")
  14.     public String paymentInfo()
  15.     {
  16.         //返回值为String类型，无请求参数
  17.         String result = restTemplate.getForObject(INVOKE_URL+"/payment/zk",String.class);
  18.         return result;
  19.     }
  20. }

6.验证测试

运行ZooKeeper服务端，cloud-consumerzk-order80，cloud-provider-payment8004。

打开ZooKeeper客户端：

  1. {
  2.   "name": "cloud-consumer-order",
  3.   "id": "95218618-544c-4e37-a692-25fbb6f0e218",
  4.   "address": "LAPTOP-PEE1UMNH",
  5.   "port": 80,
  6.   "sslPort": null,
  7.   "payload": {
  8.     "@class": "org.springframework.cloud.zookeeper.discovery.ZookeeperInstance",
  9.     "id": "application-1",
  10.     "name": "cloud-consumer-order",
  11.     "metadata": {
  12.       
  13.     }
  14.   },
  15.   "registrationTimeUTC": 1634222801335,
  16.   "serviceType": "DYNAMIC",
  17.   "uriSpec": {
  18.     "parts": [
  19.       {
  20.         "value": "scheme",
  21.         "variable": true
  22.       },
  23.       {
  24.         "value": "://",
  25.         "variable": false
  26.       },
  27.       {
  28.         "value": "address",
  29.         "variable": true
  30.       },
  31.       {
  32.         "value": ":",
  33.         "variable": false
  34.       },
  35.       {
  36.         "value": "port",
  37.         "variable": true
  38.       }
  39.     ]
  40.   }
  41. }

7.访问测试地址 - http://localhost/consumer/payment/zk

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/m0_53157173/article/details/120772519

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