【微服务】-SpringCloud整合Zookeeper

文章目录

1.先在服务器上开启Zookeeper
2.新建空项目

添加依赖
添加yml文件
写主启动类
写controller
项目完成启动项目

服务节点注册进zookeeper后是临时节点，服务停止后Zookeeper会把节点先保留一段时间，如果超时还是不能检测到服务的心跳，Zookeeper会直接删除服务节点，等待服务下次开启后重新注册。
Zookeeper代替Eureka

建项目
写pom
建yml
写启动类
配置及业务类
启动服务

1.先在服务器上开启Zookeeper

这里必须要记住服务器上的Zookeeper的版本号，3.4.11。后面要用到。

2.新建空项目

cloud-provider-payment8084

添加依赖

<dependencies>
    <dependency>
        <groupId>wf.springcloud</groupId>
        <artifactId>cloud-api-commons</artifactId>
        <version>1.0-SNAPSHOT</version>
        <scope>compile</scope>
    </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-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <!--   引入zookeeper客户端     -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    </dependency>
</dependencies>

这个依赖中有一些问题，不过我们后面在解决。

添加yml文件

server:
  port: 8084

# 服务别名---zookeeper注册中心名称
spring:
  application:
    name: cloud-provider-payment
  cloud:
    zookeeper:
      connect-string: 192.168.211.133:2181
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username: root
    password: 123456

写主启动类

@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8084 {

    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8084.class,args);
    }
}

写controller

@RestController
@Slf4j
public class PaymentController {

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

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

}

项目完成启动项目

此时会出现报错如下：

java.lang.reflect.UndeclaredThrowableException: null
	at org.springframework.util.ReflectionUtils.rethrowRuntimeException(ReflectionUtils.java:147) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperServiceRegistry.register(ZookeeperServiceRegistry.java:74) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
	at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperServiceRegistry.register(ZookeeperServiceRegistry.java:40) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperAutoServiceRegistration.register(ZookeeperAutoServiceRegistration.java:78) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:165) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
	at wf.springcloud.PaymentMain8084.main(PaymentMain8084.java:12) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.2.RELEASE.jar:2.2.2.RELEASE]
Caused by: org.apache.zookeeper.KeeperException$UnimplementedException: KeeperErrorCode = Unimplemented for /services/cloud-provider-payment/db0e2c89-7c41-4746-bf0c-a10d51130e95
	at org.apache.zookeeper.KeeperException.create(KeeperException.java:103) ~[zookeeper-3.5.3-beta.jar:3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60]
	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.5.3-beta.jar:3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60]
	at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:1525) ~[zookeeper-3.5.3-beta.jar:3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60]
	at org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1181) ~[curator-framework-4.0.1.jar:4.0.1]
	at org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1158) ~[curator-framework-4.0.1.jar:4.0.1]
	at org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:64) ~[curator-client-4.0.1.jar:na]
	at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:100) ~[curator-client-4.0.1.jar:na]
	at org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:1155) ~[curator-framework-4.0.1.jar:4.0.1]
	at org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:605) ~[curator-framework-4.0.1.jar:4.0.1]
	at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:595) ~[curator-framework-4.0.1.jar:4.0.1]
	at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:49) ~[curator-framework-4.0.1.jar:4.0.1]
	at org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.internalRegisterService(ServiceDiscoveryImpl.java:236) ~[curator-x-discovery-4.0.1.jar:na]
	at org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.registerService(ServiceDiscoveryImpl.java:191) ~[curator-x-discovery-4.0.1.jar:na]
	at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperServiceRegistry.register(ZookeeperServiceRegistry.java:71) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
	... 26 common frames omitted

这是因为我们在服务器端的Zookeeper和项目中的Zookeeper版本不匹配，因为之前说过服务器端的Zookeeper版本是3.4.11，而项目中内置的Zookeeper版本是3.5.3-bate版

故想要解决这个问题，就不让内置Zookeeper生效，使用我们与服务器端版本相同的Zookeeper。该pom文件

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.4.11</version>
</dependency>

此处只给出了Zookeeper需要修改的依赖，其他部分不动。改完pom文件后项目就可以运行了。

访问项目给出的端口

服务器端也可以看到项目已经被注册

到此SpringCloud整合Zookeeper完毕。

服务节点注册进zookeeper后是临时节点，服务停止后Zookeeper会把节点先保留一段时间，如果超时还是不能检测到服务的心跳，Zookeeper会直接删除服务节点，等待服务下次开启后重新注册。

Zookeeper代替Eureka

eureka的作用是注册中心，用来注册服务，而Zookeeper能做到与eureka相同的事情，由于我们上面已经写过一个provider项目吗，提供服务，那么我们还需要一个项目来使用它，故先建项目

建项目

新建一个cloud-consumer-orderzk80

写pom

同cloud-provider-payment8084

<dependencies>
    <dependency>
        <groupId>wf.springcloud</groupId>
        <artifactId>cloud-api-commons</artifactId>
        <version>1.0-SNAPSHOT</version>
        <scope>compile</scope>
    </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-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <!--   引入zookeeper客户端     -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.apache.zookeeper</groupId>
                <artifactId>zookeeper</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.apache.zookeeper</groupId>
        <artifactId>zookeeper</artifactId>
        <version>3.4.11</version>
    </dependency>
</dependencies>

建yml

新建application.yml文件

server:
  port: 80

# 服务别名---zookeeper注册中心名称
spring:
  application:
    name: cloud-consumer-oederzk
  cloud:
    zookeeper:
      connect-string: 192.168.211.133:2181
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username: root
    password: 123456

写启动类

PaymentOrderZkMain80 .Java

@SpringBootApplication
@EnableDiscoveryClient
public class PaymentOrderZkMain80 {

    public static void main(String[] args) {
        SpringApplication.run(PaymentOrderZkMain80.class,args);
    }
}

配置及业务类

ApplicationContextConfig .java。用于引入RestTemplate，RestTemplate可以实现不同服务间的通信，是由其他人提供如果我们想让其直接注入，就只能这样做

@Configuration
public class ApplicationContextConfig {

    @Bean
    @LoadBalanced
    public RestTemplate getTemplate(){
        return new RestTemplate();
    }
}

OrderZkController .java

@RestController
@Slf4j
public class OrderZkController {

    private static final String PATH = "http://cloud-provider-payment";

    @Resource
    private RestTemplate restTemplate;

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

启动服务

表示成功软工是建立集群则类似EurEureka。

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原文地址：https://www.cnblogs.com/wf614/p/12919800.html