spring工程dubbo docker迁移

缺乏、安全感 2023-02-23 08:20 13阅读 0赞

**1 springmvc工程迁移**  
使用当当的dubbox，也就是`dubbo2.8.4`版本时，我们的配置可以这样加载，一方面可以批量加载spring的配置，另一方面可以动态加载dubbo的消费端配置

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd">
    
    	
    	<import resource="classpath*:/spring/spring-*.xml" />
    	<import resource="classpath*:/dubbo/dubbo-*.xml" />
    </beans>

将接口类和消费端配置打包在一起，这样只要引用这个api，就都可以使用了。  
![1][]

但是`dubbo2.8.4`并不支持docker化，因为没有[k8s中dubbo注册IP问题][k8s_dubbo_IP]中所属的环境变量。  
直接切换jar到2.6.7版本，并不适用，因为他会不识别`<import resource="classpath*:/dubbo/dubbo-*.xml" />`

**1.1 web工程**

<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>dubbo</artifactId>
    			<version>2.6.7</version>
    		</dependency>
    
    
    		<dependency>
    			<groupId>org.apache.curator</groupId>
    			<artifactId>curator-framework</artifactId>
    			<version>4.0.0</version>
    			<exclusions>
    				<exclusion>
    					<groupId>org.apache.zookeeper</groupId>
    					<artifactId>zookeeper</artifactId>
    				</exclusion>
    			</exclusions>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.curator</groupId>
    			<artifactId>curator-recipes</artifactId>
    			<version>4.0.0</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.zookeeper</groupId>
    			<artifactId>zookeeper</artifactId>
    			<exclusions>
    				<exclusion>
    					<artifactId>netty</artifactId>
    					<groupId>io.netty</groupId>
    				</exclusion>
    			</exclusions>
    		</dependency>
    		<dependency>
    			<groupId>com.github.sgroschupf</groupId>
    			<artifactId>zkclient</artifactId>
    		</dependency>
    	</dependencies>
    
    <dependency>
    			<groupId>com.google.guava</groupId>
    			<artifactId>guava</artifactId>
    			
    		</dependency>

下面这个问题是curator相关的jar缺失造成的

Caused by: java.lang.NoClassDefFoundError: org/apache/curator/RetryPolicy
    	at com.alibaba.dubbo.remoting.zookeeper.curator.CuratorZookeeperTransporter.connect(CuratorZookeeperTransporter.java:27)
    	at com.alibaba.dubbo.remoting.zookeeper.ZookeeperTransporter$Adaptive.connect(ZookeeperTransporter$Adaptive.java)
    	at com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry.<init>(ZookeeperRegistry.java:69)
    	at com.alibaba.dubbo.registry.zook

spring-dubbo.xml,这里要注意实现类不要用dubbo的service，而要用spring的service，否则会出现两条注册信息,一个带版本号，另一个不带，且不带版本的没有消费者，消费者也访问不到  
![1][1 1]

<?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="${domain}" owner="${dubbo.owner}" organization="${dubbo.organization}" />
    
        
        <dubbo:registry address="${dubbo.registry.address}" />
    
        
        <dubbo:protocol name="dubbo" port="${dubbo.protocol}" />
    
        
        
    
        
    
        
        <dubbo:annotation package="com.test" />
        <dubbo:service interface="com.test.bdk.base.service.BdkWxService" ref="bdkWxServiceImpl" validation="${dubbo.service.validation}" version="${dubbo.service.version}" timeout="${dubbo.service.timeout}" retries="${dubbo.service.retries}" loadbalance="${dubbo.service.loadbalance}" actives="${dubbo.service.actives}" />
    
        <dubbo:service interface="com.test.bdk.base.service.BdkPgsService" ref="bdkPgsServiceImpl" validation="${dubbo.service.validation}" version="${dubbo.service.version}" timeout="${dubbo.service.timeout}" retries="${dubbo.service.retries}" loadbalance="${dubbo.service.loadbalance}" actives="${dubbo.service.actives}" />
    
    </beans>

**1.2 dubbo的实现类工程**

<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>dubbo</artifactId>
    			<version>2.6.7</version>
    			<exclusions>
    				<exclusion>
    					<artifactId>spring</artifactId>
    					<groupId>org.springframework</groupId>
    				</exclusion>
    			</exclusions>
    		</dependency>

如果有`dubbo2.8.4`导致冲突，则将他的引用排除出去

<dependency>
    			<groupId>com.test</groupId>
    			<artifactId>test-base</artifactId>
    			<version>1.0.0</version>
    			<exclusions>
    				<exclusion>
    					<artifactId>dubbo</artifactId>
    					<groupId>com.alibaba</groupId>
    				</exclusion>
    			</exclusions>
    		</dependency>

出现下面的问题即是`guava`缺失造成的

tory.BeanCreationException: Could not autowire field: private com.test.bdk.base.service.BdkWxService com.test.bwn.base.rest.controller.StoreController.bdkWxService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'wxService': FactoryBean threw exception on object creation; nested exception is java.lang.NoClassDefFoundError: com/google/common/base/Function
            at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
            at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)

**1.3 生产者和消费者配置**  
这个不用改变

**2 springboot工程docker迁移（采用dubbo.xml的方式）**  
**2.1 配置文件**  
`dubbo.xml`使用nacos会加载不了变量，所以配置可以放在`bootstrap.yml`中  
**2.2 启动工程**  
注意要排出`dubbo2.8.4`的版本

<dependency>
                <groupId>com.alibaba.boot</groupId>
                <artifactId>dubbo-spring-boot-starter</artifactId>
                <version>0.2.0</version>
                <exclusions>
                    <exclusion>
                        <artifactId>dubbo</artifactId>
                        <groupId>com.alibaba</groupId>
                    </exclusion>
                </exclusions>
            </dependency>

启动类不作任何更改  
如果使用加载配置，为防止多个消费者api的应用，可以采取下面的方式

import org.springframework.cloud.context.config.annotation.RefreshScope;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.ImportResource;
    @Configuration
    @RefreshScope
    @ImportResource({ "classpath*:dubbo/*.xml"
            ,"classpath*:spring/spring-*-api.xml"
    })
    public class DubboConfig {

`dubbo.xml`配置如下

<?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-2.5.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
        <dubbo:application name="${domain}" owner="${dubbo.owner}" organization="${dubbo.organization}" />
    
        
        <dubbo:registry address="${dubbo.registry.address}" check="${dubbo.reference.check}"/>
    
        
        <dubbo:protocol name="dubbo" port="${dubbo.registry.protocol}" />
    
        <dubbo:consumer check="false" />
        
        
    
        
        
        <dubbo:service interface="com.test.bzt.api.service.BztService" ref="bztServiceImpl" validation="${dubbo.service.validation}" version="${dubbo.service.version}" timeout="${dubbo.service.timeout}" retries="${dubbo.service.retries}" loadbalance="${dubbo.service.loadbalance}" actives="${dubbo.service.actives}" />
    </beans>

**2.2 dubbo服务实现类工程**  
配置xml即可

<dependency>
    				<groupId>com.alibaba</groupId>
    				<artifactId>dubbo</artifactId>
    				<version>${dubbo.version}</version>
    				<exclusions>
    					<exclusion>
    						<groupId>org.springframework</groupId>
    						<artifactId>spring</artifactId>
    					</exclusion>
    					<exclusion>
    						<groupId>javax.servlet</groupId>
    						<artifactId>servlet-api</artifactId>
    					</exclusion>
    					<exclusion>
    						<groupId>log4j</groupId>
    						<artifactId>log4j</artifactId>
    					</exclusion>
    				</exclusions>
    			</dependency>
    			<dependency>
    			<groupId>org.apache.curator</groupId>
    			<artifactId>curator-framework</artifactId>
    			<version>4.0.0</version>
    			<exclusions>
    				<exclusion>
    					<groupId>org.apache.zookeeper</groupId>
    					<artifactId>zookeeper</artifactId>
    				</exclusion>
    			</exclusions>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.zookeeper</groupId>
    			<artifactId>zookeeper</artifactId>
    			
    		</dependency>
    		<dependency>
    			<groupId>com.github.sgroschupf</groupId>
    			<artifactId>zkclient</artifactId>
    		</dependency>

**2.3 接口部分**  
与springmvc的一致  
**1.1  
问题**  
下面这个问题应该是docker镜像使用的tomcat7导致的

SEVERE: Unable to process Jar entry [module-info.class] from Jar [jar:file:/usr/local/tomcat/webapps/bdk/WEB-INF/lib/log4j-api-2.10.0.jar!/] for annotations
    org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 19
    	at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:97)
    	at org.apache.tomcat.util.bcel.classfile.ConstantPool.<init>(ConstantPool.java:55)
    	at org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:176)
    	at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:85)
    	at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2104)
    	at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1980)

FROM tomcat:8.0.47-jre8
    MAINTAINER test
    COPY xwiki /usr/local/tomcat/webapps/xwiki
    
    FROM tomcat:7.0.67-jre8
    MAINTAINER test
    ENV TOMCAT_HOME /usr/local/tomcat
    ADD server.xml $TOMCAT_HOME/conf/service.xml
    ADD dubbo-admin.war $TOMCAT_HOME/webapps

**3.2 问题**  
工程代码中是找不到`<dubbo:application />`，出现这个问题好像是因为当前这个工程即是生产者，又是消费者

Caused by: java.lang.IllegalStateException: Duplicate application configs: <dubbo:application name="peb-server" owner="test" organization="bwjf" id="peb-server" /> and <dubbo:application />
    	at com.alibaba.dubbo.config.spring.ReferenceBean.afterPropertiesSet(ReferenceBean.java:109)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1761)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1698)
    	... 17 common frames omitted

实际上并不是生产者、消费者问题导致的，而是dubbo-spring-boot-starter版本导致的`0.2.1.RELEASE`，  
在`0.2.1.RELEASE`中无需设置`<dubbo:application`，但是`0.2.0`则需要，为了兼容，我这边采用了`0.2.0`的版本

**3.2 dubbo兼容性问题**  
从下图可以看到使用`dubbo2.6.7`协议版本号是`2.0.2`  
![1][1 2]  
从下图可以看到dubbox使用的`dubbo2.8.4`,这两者协议版本不同，兼容应该会出现问题  
![1][1 3]  
德不孤，必有邻，这里[dubbox升级至apache-dubbo-2.7.2的兼容方案][dubbox_apache-dubbo-2.7.2]遇到跟我一样的问题,按照此方法调整解码编码即可  
注意

<dependency>
    			<groupId>org.javassist</groupId>
    			<artifactId>javassist</artifactId>
    			<version>3.20.0-GA</version>
    		</dependency>

[1]: https://img-blog.csdnimg.cn/20200706140652682.png
[k8s_dubbo_IP]: https://blog.csdn.net/warrah/article/details/106923454
[1 1]: https://img-blog.csdnimg.cn/202007071543534.png
[1 2]: https://img-blog.csdnimg.cn/20200707135608224.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhcnJhaA==,size_16,color_FFFFFF,t_70
[1 3]: https://img-blog.csdnimg.cn/2020070713581777.png
[dubbox_apache-dubbo-2.7.2]: https://blog.csdn.net/qq_29116427/article/details/100621126