Dubbo+Zookeeper+Spring mvc+Nginx 集群负载均衡详细demo

2023-11-16

原文链接：https://blog.csdn.net/xianghui12333/article/details/71172342

处女博客，不知道规则怎么写，直接入主题吧。

很多人刚接触分布式，集群负载均衡时都觉得高深莫测，难度有点大，其实起码入手是很简单的。我刚入公司就让我搞这个的研究，之前完全小白，nginx都没有配置过。搞了1天半，总算弄了个完整的测试项目出来，写了这个博客，以兹鼓励与纪念！

Dubbo不多说了，在国内分布式服务这块还是很牛逼的，是基于服务分布式框架，能轻松实现服务层面的负载均衡。官方文档地址http://dubbo.io/User+Guide-zh.htm

Nginx也不用多说，通过异步非阻塞能够有很大的并发量，据说是百万级，我没有真正压测过。上手十分简单，广泛应用于网站负载均衡，能轻松实现HTTP层面的负载均衡。

今天的的博客介绍的是服务层面用dubbo+zookeeper实现分布式服务，dubbo本身已经实现了服务负载均衡，所以很简单，然后Http web层用nginx负载均衡。

第一步：Zookeeper下载，安装，配置

1.1：下载：http://apache.fayea.com/zookeeper/ 一般选择稳定版本，我选的是3.4.9

1.2：然后解压到一个目录，打开conf目录copy一份zoo_sample.cfg文件，并重命名为zoo.cfg（必须是这个名字）

1.3：打开zoo.cfg，入手阶段基本不用做什么修改，唯一需要注意的是端口号，后面的dubbo 管理配置需要和这个保持一致（后面说）

1.4：找到bin目录下的 zKserver.cmd 启动zookeeper

这里zookeeper就OK了

第二步：下载，配置dubbo的管理项目

2.1 下载 dubbo admin 项目地址：http://dubbo.io/Download-zh.htm

2.2 解压，取出war包。

2.3 拷贝一个tomcat，改一下端口号（用默认容易和其他的tomcat端口冲突）

2.4 删除 tomcat webapp 目录下面的文件，将dubbo admin 包解压内容放到root目录中，修改classpath 目录下的dubbo.properties，将这个监测中心注册到zookeeper，即将dubbo.registry.address改成你安装zookeeper的机子IP+zookeeper配置的端口。我这里是一台机子演示，默认端口与zookeeper是一致的所以不用修改。用户名密码就没有改动的必要了。

2.5 bin目录启动tomcat，输入这个tomat的访问网址 http://localhost:8180/ （端口号注意修改成你自己改的那个）,然后登陆密码都是就是上面配置文件中的，root root登录

这里可以看到，提供者为0，消费者为0

第三步：创建提供者

3.1：创建公用接口项目 service，创建两个provider （provider01，provider02）

service包，公用接口，很简单，就是个maven基础java包，不需要加入任何依赖，也不需要加入任何配置文件

<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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</project>

2个provider包引入service依赖，且需要引入dubbo，zookeeper，log4依赖，这里不需要引入Spring，dubbo自带依赖，不过版本很旧，也可以自己手动移除然后引入新版本Spring。下面给出其中一个的pom实例，copy请自行修改artifactId

pom.xml：

<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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>provider02</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>com.test</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.3.3</version>
</dependency>

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>

<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<archive>
<manifest>
<mainClass>com.test.provider.Provider</mainClass>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
<classesDirectory>
</classesDirectory>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

3.2 在service公有服务接口包中新建接口TestService,内容很简单，就包含一个测试接口

TestService.java：

package com.test.service;
/**
* @author xianghui1
*
*test
*/
public interface TestService {
public String test();
}

3.3 provider 提供者需要实现这个公用接口以向消费者提供服务，两个provider基本是一样的，除了部分配置

provider02 ： TestServiceImpl.java实现公有接口 testService

package com.test.service;
import com.test.service.TestService;
public class TestServiceImpl implements TestService {
public String test() {
System.out.println("test success");
return "provider02";
}
}

provider01 ： TestServiceImpl.java实现公有接口 testService

package com.test.service;
import com.test.service.TestService;
public class TestServiceImpl implements TestService {
public String test() {
System.out.println("test success");
return "provider01";
}
}

2个provider，随意实现，返回效果不同就行了，因为后面要测试集群负载均衡效果

3.4 到这里提供者代码层面基本完了，该项目增加配置文件，在classpath目录下新建3个配置文件：applicationContext.xml（Spring配置文件），log4.properties，provider.xml（dubbo 提供者配置文件，重要）

applicationContext.xml：（2个provider一模一样）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
<context:component-scan base-package="com.test" />
</beans>

log4.properties:(2个provider一样）

log4j.appender.mylog = org.apache.log4j.ConsoleAppender
log4j.appender.mylog.target = System.out
log4j.appender.mylog.layout= org.apache.log4j.PatternLayout
log4j.appender.mylog.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n
log4j.appender.my2log = org.apache.log4j.RollingFileAppender
log4j.appender.my2log.File = D://Logger//mylog.log
log4j.appender.my2log.MaxFileSize = 50KB
log4j.appender.my2log.MaxBackupIndex = 1
log4j.appender.my2log.layout= org.apache.log4j.PatternLayout
log4j.appender.my2log.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n
log4j.rootLogger = info,mylog,my2log

provider01： provider.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

<dubbo:application name="provider" />

<dubbo:registry address="zookeeper://127.0.0.1:2181"/>

<dubbo:protocol name="dubbo" port="20881" />

<bean id="testService" class="com.test.service.TestServiceImpl" />

<dubbo:service interface="com.test.service.TestService" ref="testService" />
</beans>

provider02： provider.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

<dubbo:application name="provider" />

<dubbo:registry address="zookeeper://10.120.106.35:2181" />

<dubbo:protocol name="dubbo" port="20882" />

<bean id="testService" class="com.test.service.TestServiceImpl" />

<dubbo:service interface="com.test.service.TestService" ref="testService" />
</beans>

这里需要注意，2个provider的应用名，一样，因为模拟集群负载均衡，所以对Dubbo来说是一个服务。2个provider的端口需不一样，因为是同一台机子模拟2个服务，如果是多台就无所谓了。dubbo：Service须保持一致，因为2个provider负载均衡是模拟一个服务，所以提供的服务外面看来须一样。

3.5，业务代码以及配置文件都完成了，该启动2个provider了，新建provider类，并调用main启动，代码如下；

Provider.java（2个provider一样即可）

package com.test.provider;
import org.apache.log4j.PropertyConfigurator;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Provider {
// start provider
static{
PropertyConfigurator.configure("src/main/resources/log4.properties");
}
public static void main(String args[]) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath*:/*.xml");
context.start();
System.in.read();
}
}

成功启动之后，显示注册到了zookeeper。

这个时候我们刷新下dubbo.admin页面看看效果，显示提供者为1，说明一切正常

然后启动第二个provider，至这里显示提供者为2，服务数为1，一切OK，下一步我们开始消费者端。

第四步：创建消费者，这里创建2个Spring mvc web项目来充当消费的角色。

2个消费者（dubbo-consumer01，dubbo-consumer02）也一样，基本一样，就是服务实现不一样来测试负载均衡，还有个消费者配置文件不一样。

4.1 2个消费者POM.xml基本是一样的，标准的Spring mvc web项目,需要引入dubbo,zookeeper，公有服务service，Spring mvc系列，log4系列。这里需要注意的是，dubbo的Spring实在过于老旧了，对于web项目来说是不合适的，遇到了版本冲突，所以需要剔除dubbo中依赖的spring2.5

pom.xml（copy请自行修改 groupId与artifactId）：

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>dubbo-consumer02</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>customer02 Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.3.8.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.test</groupId>
<artifactId>service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
<exclusions>
<exclusion>
<artifactId>spring</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>


<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>

<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-jaxrs</artifactId>
<version>1.9.11</version>
</dependency>

<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.0</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.3</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.8</version>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.8.3</version>
</dependency>
<dependency>
<groupId>commons-chain</groupId>
<artifactId>commons-chain</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>3.3</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-digester3</artifactId>
<version>3.2</version>
</dependency>
<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>3.3</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.5</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-email</artifactId>
<version>1.3.3</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>

<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
</dependencies>
<build>
<finalName>dubbo-customer02</finalName>
</build>
</project>

4.2，两个web项目的主要配置文件，共5个：web.xml、applicationContext.xml、consumer.xml、log4.properties、springmvc-servlet.xml。

web.xml ：基本一样这里只放出一个

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>Archetype Created Web Application</display-name>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:log4.properties</param-value>
</context-param>
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>3000</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/</url-pattern>
</filter-mapping>

<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.png</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>


<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

applicationContext.xml 2个consumer一模一样，只是引入consumer消费者配置文件，很简单

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
<import resource="classpath*:/consumer.xml" />
</beans>

consumer.xml: 消费者配置文件，这个很重要，这里消费者应用名不能一样了，因为我模拟是2个消费者，然后需要向zookeeper中心注册，还有个很重要的就是引用提供者提供的远程服务

consumer01: consumer.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

<dubbo:application name="consumer01" />

<dubbo:registry address="zookeeper://127.0.0.1:2181"/>

<dubbo:reference id="testService" interface="com.test.service.TestService" />
</beans>

consumer02: consumer.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

<dubbo:application name="consumer02" />

<dubbo:registry address="zookeeper://127.0.0.1:2181"/>

<dubbo:reference id="testService" interface="com.test.service.TestService" />
</beans>

log4配置文件，没什么好说的，同provider,这里不粘了

springmvc-servlet.xml ：配置文件，很简单，启用注解与controller扫描，没了。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd"
default-lazy-init="true">

<context:annotation-config />

<context:component-scan base-package="com.test.controller" />

<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<bean
class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean id="defaultViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:order="3">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="contentType" value="text/html" />
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>

4.3 spring mvc web 项目配置已经完成了，这一步，可以直接启动项目，启动成功，且能进helloworld 页则说明你的配置没有出现细微错误，否则需要检查检查，保证项目是正常的，不然后面排错懵逼。

现在我们新建个controller，很简单，就弄个接口，调用提供者的远程服务

consumer01: TestController：

[java] view plain copy

<code class="language-html">package com.test.controller;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.test.service.TestService;
/**
* @author xianghui1
*
* 测试controller
*/
@Controller
public class TestController {
@Resource(name = "testService")
TestService testInterface;
@RequestMapping(value = { "/consumer/testMain" })
@ResponseBody
public String testDubbo() {
return "consuemr01" + testInterface.test();
}
}</code>

consumer02 TestController:

package com.test.controller;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.test.service.TestService;
/**
* @author xianghui1
*
*测试controller
*/
@Controller
public class TestController {
@Resource(name="testService")
TestService testInterface;
@RequestMapping(value={"/consumer/testMain"})
@ResponseBody
public String testDubbo(){
return "consuemr02"+testInterface.test();
}
}

4.4,然后我们可以启动了，我们将2个consuemr分别放在两个tomcat中运行，2个tomcat端口要不一致的

可以看出2个consumer，2个provider，一切正常，我们在浏览器中访问我们的接口，也是正常

第五步：到这里我们的dubbo+zookeeper+Spring mvc 搭建完成了，下一步，加入nginx 实现http层面的负载均衡

5.1 下载nginx，解压，并修改conf目录下的nginx.conf

5.2我们新建个upstream 负载均衡，采取默认的nginx负载均衡策略，然后监听80端口，将80端口所有的请求代理转发到负载上面

5.3 命令行启动nginx，然后在浏览器中输入接口网址即可发现会出现四种结果，consumer01provider01、consumer02provider01、consumer01provider02、consumer02provider02. dubbo+zookeeper+spring mvc+nginx负载均衡测试完成

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