一、docker环境下部署zookeeper

1.下拉镜像

docker pull zookeeper

2.部署容器

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

二、SpringCloud向zookeeper中注册服务

1.引入jar包

   <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    </dependency>

2.完成pom文件内容

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>test-zookeeper</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>test-zookeeper</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2021.0.1</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.配置application.yml

server:
  port: 8082
# 服务别名---zookeeper注册中心名称
spring:
  application:
    name: test-zookeeper
  cloud:
    zookeeper:
      connect-string: 192.168.87.128:2181 #zookeeper地址
      max-retries: 10

4.使用@EnableDiscoveryClient注解声明main方法

@SpringBootApplication
@EnableDiscoveryClient
public class TestZookeeperApplication {
    public static void main(String[] args) {
        SpringApplication.run(TestZookeeperApplication.class, args);
    }
}

5.启动服务查看zookeeper中注册的服务

1. 进入容器内容

   docker exec -it zookeeper zkCli.sh

2. 查看注册的服务

   ls /services

3. 此处注册了三个服务
   

三、微服务间方法调用

1. 声明RestTemplate模板

@Configuration
public class ApplicationContextConfig {
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

2. 调用接口

@RestController
public class TestController {
    //微服务注册名称
    private static final String INVOKE_URL = "http://private-cloudzk8002";
    @Resource
    private RestTemplate restTemplate;
    @GetMapping(value = "paymentInfo")
    public String paymentInfo(){
        //微服务中接口路径
        String result = restTemplate.getForObject(INVOKE_URL + "/consumer/payment/zk", String.class);
        return result;
    }
}

3.请求结果

8082端口返回8002端口的接口信息，调用成功

总结

1. 引入jar包，配置zookeeper的配置文件
2. 使用@EnableDiscoveryClient注解声明main方法即可成功