cloudfoundry搭建jenkins

学无止境，气有浩然

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前言

工作的时候由于测试环境的Jenkins坏掉了，想着自己手动搭建一个看看，使用cloudfoundry，差点没被折磨死。

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安装

按照脚本来

cf push jenkins -f manifest.yml
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manifest.yml如下：

---
applications:
- name: jenkins
  routes: 
  - route: jenkins.com
  memory: 2G
  instances: 1
  path: jenkins.war
  buildpacks:
  - java_buildpack_offline
  env:
   JBP_DEFAULT_OPEN_JDK_JRE: '{ jre: { version: 17.+ }}'
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问题

人要麻掉了，官网上显示其实是可以使用这种的，但是构建上去就是报错

024-03-20T14:09:45.536+08:00 [APP/PROC/WEB/0] [OUT] JVM Memory Configuration: -Xmx3529720K -Xss1M -XX:ReservedCodeCacheSize=240M -XX:MaxDirectMemorySize=10M -XX:MaxMetaspaceSize=152583K
2024-03-20T14:09:48.194+08:00 [APP/PROC/WEB/0] [ERR] ZipFile.name trick did not work, using fallback: java.lang.ClassCastException: class sun.net.www.protocol.file.FileURLConnection cannot be cast to class java.net.JarURLConnection (sun.net.www.protocol.file.FileURLConnection and java.net.JarURLConnection are in module java.base of loader 'bootstrap')
2024-03-20T14:09:48.312+08:00 [APP/PROC/WEB/0] [OUT] Running from: /home/vcap/tmp/jenkins11504501778207486124.jar
2024-03-20T14:09:48.314+08:00 [APP/PROC/WEB/0] [OUT] webroot: /home/vcap/.jenkins/war
2024-03-20T14:09:48.661+08:00 [APP/PROC/WEB/0] [ERR] 2024-03-20 06:09:48.601+0000 [id=1] INFO winstone.Logger#logInternal: Beginning extraction from war file
2024-03-20T14:09:48.664+08:00 [APP/PROC/WEB/0] [ERR] 2024-03-20 06:09:48.664+0000 [id=1] INFO winstone.Logger#logInternal: Jetty shutdown successfully
2024-03-20T14:09:48.664+08:00 [APP/PROC/WEB/0] [ERR] java.util.zip.ZipException: zip END header not found
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile$Source.findEND(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile$Source.initCEN(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile$Source.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile$Source.get(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile$CleanableResource.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.zip.ZipFile.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.jar.JarFile.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.jar.JarFile.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.util.jar.JarFile.(Unknown Source)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at winstone.HostConfiguration.getWebRoot(HostConfiguration.java:277)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at winstone.HostConfiguration.(HostConfiguration.java:88)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at winstone.HostGroup.initHost(HostGroup.java:66)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at winstone.HostGroup.(HostGroup.java:45)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at winstone.Launcher.(Launcher.java:188)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at winstone.Launcher.main(Launcher.java:492)
2024-03-20T14:09:48.665+08:00 [APP/PROC/WEB/0] [ERR] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2024-03-20T14:09:48.666+08:00 [APP/PROC/WEB/0] [ERR] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2024-03-20T14:09:48.666+08:00 [APP/PROC/WEB/0] [ERR] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2024-03-20T14:09:48.666+08:00 [APP/PROC/WEB/0] [ERR] at java.base/java.lang.reflect.Method.invoke(Unknown Source)
2024-03-20T14:09:48.666+08:00 [APP/PROC/WEB/0] [ERR] at executable.Main.main(Main.java:347)
2024-03-20T14:09:48.667+08:00 [APP/PROC/WEB/0] [ERR] 2024-03-20 06:09:48.665+0000 [id=1] SEVERE winstone.Logger#logInternal: Container startup failed
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解决

java_buildpack_offline这种构建方式，在war包上传上去就已经被解压了。所以在执行的时候就会报错，因为找不到这个war包了。我们可以换一种思路。
Jenkins提供的war包是可以脱离tomcat独立运行的。原因就是因为集成了jetty，就在在目录executable里面的winstone.jar，那我们直接运行这个jar不就行了，查看运行说明。

java -jar winstone.jar

Required options: either --webroot OR --warfile OR --webappsDir OR --hostsDir
   --webroot                = set document root folder
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那看起来我们只需要加上--webroot执行当前目录其实就可以了。

cf push jenkins -f manifest.yml --start-command="java -jar executable/winstone.jar --webroot="./""
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只要思想不滑坡，办法总比困难多！

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打完收工！