k8s部署-25-dubbo服务迁移到k8s系统中

到dubbo上场了，该迁移dubbo咯，开始。

迁移流程

老规矩，老图上场。

基础镜像

也是基于java环境的，那真是又巧了哈，我们看下迁移定时任务那一篇，就可以了，这里就不水文了。

服务本身

1、软件下载

我发现这个不需要下载，因为本身不需要了解这些，我在这里只是为了有个清晰的认知的。你们操作的时候肯定是根据自己的实际业务中的dubbo环境进行的，当然了，感兴趣的同学可以私我哈，就不放下载链接了。

2、服务认识

[root@node1 ~]# mkdir -pv ceshi/dubbomkdir: 已创建目录 "ceshi/dubbo"[root@node1 ~]# cd ceshi/dubbo/[root@node1 dubbo]# unzip dubbo-demo.zip[root@node1 dubbo]# cd dubbo-demo[root@node1 dubbo-demo]#  vim src/main/java/com/mooc/demo/service/DemoServiceImpl.java # 可以看到里面定义了一个DemoService，sayHello里面就简单的回复了一个内容package com.mooc.demo.service;import com.mooc.demo.api.DemoService;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * Created by Michael on 2018/9/25. */public class DemoServiceImpl implements DemoService {    private static final Logger log = LoggerFactory.getLogger(DemoServiceImpl.class);    public String sayHello(String name) {        log.debug("dubbo say hello to : {}", name);        return "Hello "+name;    }}[root@node1 dubbo-demo]#  # 申明了接口的名字    <!-- service implementation, as same as regular local bean -->    <bean id="demoService" class="com.yunweijia.demo.service.DemoServiceImpl"/>    <!-- declare the service interface to be exported -->    <dubbo:service interface="com.yunweijia.demo.api.DemoService" ref="demoService"/>[root@node1 dubbo-demo]# vim src/main/assembly/assembly.xml # 申明了打包的格式    <formats>        <format>tar.gz</format>    </formats>[root@node1 dubbo-demo]# vim src/main/resources/dubbo.properties # 申明了一些基础配置，在这里会使用一个zookeeper服务，随便找个服务器搭建下# 这里就不写如何搭建了哈，这都不是重点，重点是如何迁移dubbo.application.name=demodubbo.registry.address=zookeeper://10.1.2.31:2181dubbo.spring.config=classpath*:spring/provider.xmldubbo.protocol.name=dubbodubbo.protocol.port=20880[root@node1 dubbo-demo]# [root@node1 dubbo-demo]# ls src/main/bin/# 这里放了两个脚本，一个是启动脚本，一个是停止脚本start.sh  stop.sh[root@node1 dubbo-demo]#

3、构建镜像：

# 必须要走这一步才可以打包，但是这个原理咱们不用管# 因为打包这个步骤是研发操作的，咱们这里只是做示例[root@node1 dubbo-demo]# cd ../dubbo-demo-api/[root@node1 dubbo-demo-api]# lspom.xml  src[root@node1 dubbo-demo-api]# mvn install# 出现如下字样就可以了[INFO] ------------------------------------------------------------------------[INFO] BUILD SUCCESS[INFO] ------------------------------------------------------------------------[INFO] Total time:  2.516 s[INFO] Finished at: 2022-03-30T17:14:47+08:00[INFO] ------------------------------------------------------------------------[root@node1 dubbo-demo-api]#[root@node1 dubbo-demo-api]# cd ../dubbo-demo[root@node1 dubbo-demo]# mvn package# 出现如下字样就可以了[INFO] ------------------------------------------------------------------------[INFO] BUILD SUCCESS[INFO] ------------------------------------------------------------------------[INFO] Total time:  01:10 min[INFO] Finished at: 2022-03-30T17:16:34+08:00[INFO] ------------------------------------------------------------------------[root@node1 dubbo-demo]# 

4、测试下打包的程序是否可以运行：

[root@node1 dubbo-demo]# cd target/[root@node1 target]# mkdir ROOT[root@node1 target]# tar xf dubbo-demo-1.0-SNAPSHOT-assembly.tar.gz -C ROOT/[root@node1 target]# cd ROOT/[root@node1 ROOT]# lsbin  conf  lib[root@node1 ROOT]# ./bin/start.sh Starting the demo ...[2022-03-30 17:37:52] Dubbo service server started!# 可以看到服务正常启动# 简单测试下，在node2上进行以下操作[root@node2 boot]# telnet 192.168.112.130 20880Trying 192.168.112.130...Connected to 192.168.112.130.Escape character is '^]'.dubbo>lscom.mooc.demo.api.DemoServicedubbo>ls com.mooc.demo.api.DemoServicesayHellodubbo>invoke com.mooc.demo.api.DemoService.sayHello("yunweijia")"Hello yunweijia"elapsed: 0 ms.dubbo>exitConnection closed by foreign host.[root@node2 boot]#

经过以上操作表示，程序本身无异常。

构建镜像

[root@node1 dubbo-demo]# pwd/root/mooc-k8s-demo/dubbo-demo[root@node1 dubbo-demo]# vim DockerfileFROM registry.cn-beijing.aliyuncs.com/yunweijia0909/openjdk:8-jreCOPY target/ROOT /ROOTENTRYPOINT ['sh', '/ROOT/bin/start.sh'][root@node1 dubbo-demo]#[root@node1 dubbo-demo]# cd ..[root@node1 mooc-k8s-demo]# tar zcf dubbo-demo.tar.gz dubbo-demo# 把以上目录打个包，传输到一台有docker环境的服务器上，进行如下操作[root@jier ~]# tar xf dubbo-demo.tar.gz [root@jier ~]# cd dubbo-demo/[root@jier dubbo-demo]# docker build -t dubbo-demo:v1 .Sending build context to Docker daemon  25.78MBStep 1/3 : FROM registry.cn-beijing.aliyuncs.com/yunweijia0909/openjdk:8-jre ---> 71d97cb5644aStep 2/3 : COPY target/ROOT /ROOT ---> 795d13d9d449Step 3/3 : ENTRYPOINT ['sh', '/ROOT/bin/start.sh'] ---> Running in 8c0fcbb46affRemoving intermediate container 8c0fcbb46aff ---> 9f6a10e9dc3aSuccessfully built 9f6a10e9dc3aSuccessfully tagged dubbo-demo:v1[root@jier dubbo-demo]# [root@jier dubbo-demo]# docker tag dubbo-demo:v1 registry.cn-beijing.aliyuncs.com/yunweijia0909/dubbo-demo:v1[root@jier dubbo-demo]# docker push registry.cn-beijing.aliyuncs.com/yunweijia0909/dubbo-demo:v1The push refers to repository [registry.cn-beijing.aliyuncs.com/yunweijia0909/dubbo-demo]9bd8786c2b0a: Pushed 6708e662f7d4: Mounted from yunweijia0909/springboot-web 2543359fb19b: Mounted from yunweijia0909/springboot-web 200bb8035fe4: Mounted from yunweijia0909/springboot-web 6e632f416458: Mounted from yunweijia0909/springboot-web e019be289189: Mounted from yunweijia0909/springboot-web c9a63110150b: Mounted from yunweijia0909/springboot-web v1: digest: sha256:f8e8f275b113dcf8e36d953b6ff1985240647c7e95aba1beb23e99d6f2490157 size: 1794[root@jier dubbo-demo]# 

服务发现策略

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