Spring Cloud (4): registro y descubrimiento del servicio Zookeeper

1. Registro y descubrimiento del servicio Zookeeper

1.1 Instalar zookeeper usando Docker

Consulte este blog para ver el tutorial de instalación de Docker : tutorial de instalación de Docker

Descargar espejo

docker pull zookeeper:3.4.9

Inserte la descripción de la imagen aquí

Inicie el contenedor y agregue el mapeo:

docker run --privileged=true -d --name zookeeper --publish 2181:2181  -d zookeeper:3.4.9

Comprueba si está activado

1.2 SpringCloud integra Zookeeper en lugar de Eureka

Zookeeper es una herramienta de coordinación distribuida que puede realizar la función de registro.
Apague el servidor de seguridad del servidor Linux e inicie el servidor
Zookeeper . El servidor Zookeeper reemplaza al servidor Eureka, y zk sirve como registro de servicios.

proveedor de servicio

Crear un nuevo módulo cloud-provider-payment8004
Cambiar 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>spring-cloud-demo</artifactId>
        <groupId>com.lele.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <dependencies>
        <!-- SpringBoot 整合 zookeeper 客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        </dependency>
        <!-- 引入自定义的api通用包，可以使用Payment支付Entity -->
        <dependency>
            <groupId>com.lele.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <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>-->
<!--        <dependency>-->
<!--            <groupId>org.mybatis.spring.boot</groupId>-->
<!--            <artifactId>mybatis-spring-boot-starter</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>com.alibaba</groupId>-->
<!--            <artifactId>druid-spring-boot-starter</artifactId>-->
<!--            <version>1.1.10</version>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>mysql</groupId>-->
<!--            <artifactId>mysql-connector-java</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.boot</groupId>-->
<!--            <artifactId>spring-boot-starter-jdbc</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>

L 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: localhost:2181  #zookeeper所在的主机ip地址

Clase de salida principal

package com.lele.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @author: lele
 * @date: 2021/3/9 22:24
 * @description:
 */
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8004 {
    
    
    public static void main(String[] args) {
    
    
        SpringApplication.run(PaymentMain8004.class, args);
    }
}

Controlador

package com.lele.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;

/**
 * @author: lele
 * @date: 2021/3/10 7:00
 * @description:
 */
@RestController
@Slf4j
public class PaymentController {
    
    

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

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

Inicie 8004 para registrarse en zookeeper
Resuelva el problema del conflicto del paquete jar de la versión de zookeeper
Modificar pom

<!-- 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>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

Inserte la descripción de la imagen aquí

访问： http: // localhost: 8003 / payment / zk
Prueba de verificación:

docker exec -it 容器id /bin/bash
cd bin/
zkCli.sh

ls /
ls /services

Inserte la descripción de la imagen aquí

Aquí el nombre del nodo es el nombre de la aplicación de resorte configurada por yml

Prueba de verificación 2:

ls /services/cloud-provider-payment

Inserte la descripción de la imagen aquí

get /services/cloud-provider-payment/a855f6d9-cb61-478e-919d-660d62e9f951

Inserte la descripción de la imagen aquí
Pensando: ¿Es el
nodo de servicio un nodo temporal o un nodo persistente?

Es un nodo temporal.

Consumidor de servicios

Nuevo módulo cloud-consumerzk-order80
Cambiar 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>spring-cloud-demo</artifactId>
        <groupId>com.lele.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumerzk-order80</artifactId>

    <dependencies>
        <!-- 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>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- 引入自定义的api通用包，可以使用Payment支付Entity -->
        <dependency>
            <groupId>com.lele.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</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>

marga

server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  cloud:
  #注册到zookeeper地址
    zookeeper:
      connect-string: localhost:2181  #zookeeper所在的主机ip地址

Clase de salida principal

package com.lele.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @author: lele
 * @date: 2021/3/10 22:16
 * @description:
 */
@SpringBootApplication
@EnableDiscoveryClient
public class OrderZKMain80 {
    
    
    public static void main(String[] args) {
    
    
        SpringApplication.run(OrderZKMain80.class, args);
    }
}

Configurar RestTemplate:

package com.lele.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;

/**
 * @author: lele
 * @date: 2021/3/10 22:21
 * @description:
 */
@Configuration
public class ApplicationContextConfig {
    
    
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate() {
    
    
        return new RestTemplate();
    }
}

controlador

package com.lele.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;

/**
 * @author: lele
 * @date: 2021/3/10 22:26
 * @description:
 */
@RestController
@Slf4j
public class OrderZKController {
    
    

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

    @Resource
    private RestTemplate restTemplate;

    @GetMapping(value = "/consumer/payment/zk")
    public String paymentInfo() {
    
    
        String result = restTemplate.getForObject(INVOKE_URL+"/payment/zk", String.class);
        return result;
    }
}

Comience 80 para registrarse en el guardián del zoológico
Inserte la descripción de la imagen aquí

访问：
http: // localhost / consumer / payment / zk