Jenkins是一个用Java编写的开源持续集成工具,是在2010年之后从Hudson中fork出来的项目,这次fork的原因是社区和Oracle公司之间的一些商标争论。目前已经有许多开源项目使用Jenkins做持续集成(当然一些其他的开源项目也有很多使用Jenkins),其中不乏一些非常著名的项目,如:
OpenStack: https://jenkins.openstack.org/ (很壮观的,里面有各种测试项目、测试机器、测试报告等)
Apache: https://builds.apache.org/ (这个也很壮观哦)
KDE: http://build.kde.org/
Jenkins: https://ci.jenkins-ci.org/ (当然Jenkins自己CI工具也是Jenkins了,哈哈)
在参与测试的OpenStack项目中,我们也用Jenkins在内部搭建了持续集成环境,主要用于 Nova/Quantum/Ceilometer 等几个子项目的持续集成。
原来搭建时,还是直接用”java -jar jenkins.war”类似这样(当然作为daemon)来执行的。今天,主要是简单了解了一下将Jenkins放到Jetty这样的Java Servlet container中运行。在搭建环境过程中遇到过几个小问题,也顺便记录一下吧。
1. Jetty 9.0.3 启动时的错误:
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[root@kvm-guest jetty-9.0.3]# java -jar start.jar Exception in thread "main" java.lang.UnsupportedClassVersionError: org/eclipse/jetty/start/Main : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:634) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) at java.net.URLClassLoader.access$000(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:212) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) Could not find the main class: org.eclipse.jetty.start.Main. Program will exit. |
原因:Jetty 9 需要 JVM 1.7 的支持(我原来的JVM是1.6)
解决方案:使用Java 1.7即可。
2. 将jenkns.war复制到webapp目录后,启动Jetty,但jenkins访问出错,HTTP ERROR 503。
启动和关闭Jetty的命令为:
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[root@kvm-guest jetty-9.0.3]# java -jar start.jar -DSTOP.PORT=8881 -DSTOP.KEY=magic --daemon & [root@kvm-guest jetty-9.0.3]# java -jar start.jar -DSTOP.PORT=8881 -DSTOP.KEY=magic --stop |
在浏览器中访问时,遇到的错误信息如下:
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HTTP ERROR: 503 Problem accessing /jenkins/. Reason: Service Unavailable ------------ Powered by Jetty |
查看Jetty的log中,可以看到如下的错误信息:
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2013-05-21 14:33:31.265:WARN:oejuc.AbstractLifeCycle:main: FAILED org.eclipse.jetty.security.ConstraintSecurityHandler@70188b41: java.lang.IllegalStateException: No LoginService for org.eclipse.jetty.security.authentication.FormAuthenticator@790bb6f4 in org.eclipse.jetty.security.ConstraintSecurityHandler@70188b41 java.lang.IllegalStateException: No LoginService for org.eclipse.jetty.security.authentication.FormAuthenticator@790bb6f4 in org.eclipse.jetty.security.ConstraintSecurityHandler@70188b41 at org.eclipse.jetty.security.authentication.LoginAuthenticator.setConfiguration(LoginAuthenticator.java:67) at org.eclipse.jetty.security.authentication.FormAuthenticator.setConfiguration(FormAuthenticator.java:131) at org.eclipse.jetty.security.SecurityHandler.doStart(SecurityHandler.java:375) at org.eclipse.jetty.security.ConstraintSecurityHandler.doStart(ConstraintSecurityHandler.java:457) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69) ................... 2013-05-21 14:33:31.267:WARN:oejuc.AbstractLifeCycle:main: FAILED org.eclipse.jetty.server.session.SessionHandler@5b5e91e5: java.lang.IllegalStateException: No LoginService for org.eclipse.jetty.security.authentication.FormAuthenticator@790bb6f4 in org.eclipse.jetty.security.ConstraintSecurityHandler@70188b41 java.lang.IllegalStateException: No LoginService for org.eclipse.jetty.security.authentication.FormAuthenticator@790bb6f4 in org.eclipse.jetty.security.ConstraintSecurityHandler@70188b41 at org.eclipse.jetty.security.authentication.LoginAuthenticator.setConfiguration(LoginAuthenticator.java:67) at org.eclipse.jetty.security.authentication.FormAuthenticator.setConfiguration(FormAuthenticator.java:131) ................... 2013-05-21 14:33:31.268:WARN:oejw.WebAppContext:main: Failed startup of context o.e.j.w.WebAppContext@729b9707{/jenkins,file:/tmp/jetty-0.0.0.0-8080-jenkins.war-_jenkins-any-/webapp/,STARTING}{/root/jetty-9.0.3/webapps.demo/jenkins.war} java.lang.IllegalStateException: No LoginService for org.eclipse.jetty.security.authentication.FormAuthenticator@790bb6f4 in org.eclipse.jetty.security.ConstraintSecurityHandler@70188b41 at org.eclipse.jetty.security.authentication.LoginAuthenticator.setConfiguration(LoginAuthenticator.java:67) at org.eclipse.jetty.security.authentication.FormAuthenticator.setConfiguration(FormAuthenticator.java:131) at org.eclipse.jetty.security.SecurityHandler.doStart(SecurityHandler.java:375) at org.eclipse.jetty.security.ConstraintSecurityHandler.doStart(ConstraintSecurityHandler.java:457) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:108) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:90) |
原因:Jetty 8.1.0之后对安全性有了一些要求,需要显示注明安全域(security realm)。
解决方法:编辑(或新建) webapps/jenkins.xml 文件,添加如下配置。
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<Configure class="org.eclipse.jetty.webapp.WebAppContext"> <Set name="contextPath">/jenkins</Set> <Set name="war"><SystemProperty name="jetty.home" default="."/>/webapps/jenkins.war</Set> <Get name="securityHandler"> <Set name="loginService"> <New class="org.eclipse.jetty.security.HashLoginService"> <Set name="name">Jenkins Realm</Set> <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set> </New> </Set> </Get> </Configure> |
另外,Jetty 自带的示例:webapps.demo/test.xml 中也有security realm相关的配置。
解决了这两个问题后,Jenkins示例URL:http://192.168.52.11:8080/jenkins/ 就可以正常访问了。
参考资料:
http://www.eclipse.org/jetty/documentation/current/what-jetty-version.html
http://stackoverflow.com/questions/9111759/http-error-503-accessing-jenkins-reason-service-unavailable
https://wiki.jenkins-ci.org/display/JENKINS/Jetty
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