虚拟机下安装jenkins报错：该jenkins实例似乎已离线
今天在虚拟机上安装jenkins，记录一下其中的一个错误的处理。首先准备好jdk和tomcat，配置好环境cd /usr/local/apache-tomcat-7.0.57/webapps执行wget http://mirrors.jenkins-ci.org/war-stable/latest/jenkins.warwebapp下有一个jenkins.war文件 之后直接交给tomcat来解压
今天在虚拟机上安装jenkins，记录一下其中的一个错误的处理。
首先准备好jdk和tomcat，配置好环境
cd /usr/local/apache-tomcat-7.0.57/webapps
执行wget http://mirrors.jenkins-ci.org/war-stable/latest/jenkins.war
webapp下有一个jenkins.war文件
之后直接交给tomcat来解压部署
cd ../bin
./startup.sh
cd ../logs
tail -100fcatalina.out查看log日志
会发现最后后报错：
五月 24, 2018 2:16:55 下午 hudson.model.UpdateCenter updateDefaultSite 警告: Upgrading Jenkins. Failed to update the default Update Site 'default'. Plugin upgrades may fail. javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1506) at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979) at sun.security.ssl.Handshaker.process_record(Handshaker.java:914) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062) at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1512) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1440) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254) at hudson.model.DownloadService.loadJSON(DownloadService.java:167) at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:190) at hudson.model.UpdateCenter.updateDefaultSite(UpdateCenter.java:2194) at jenkins.install.SetupWizard.init(SetupWizard.java:173) at jenkins.install.InstallState$4.initializeState(InstallState.java:110) at jenkins.model.Jenkins.setInstallState(Jenkins.java:1033) at jenkins.install.InstallUtil.proceedToNextStateFrom(InstallUtil.java:97) at jenkins.install.InstallState$1.initializeState(InstallState.java:55) at jenkins.model.Jenkins$17.run(Jenkins.java:3149) at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169) at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296) at jenkins.model.Jenkins$5.runTask(Jenkins.java:1062) at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214) at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387) at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) at sun.security.validator.Validator.validate(Validator.java:260) at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1488) ... 29 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:146) at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131) at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ... 35 more |
如果没有看日志，那么打开192.168.211.103:8080/jenkins会显示该jenkins实例似乎已离线
为什么会报这个错误呢？
参考：
解决 PKIX：unable to find valid certification path to requested target
原因是就是升级站点的链接https://updates.jenkins.io/update-center.json默认是https的，如何解决呢？
解决方案1:
安装插件那个页面，就是提示你offline的那个页面，不要动。然后打开一个新的tab，输入网址http://192.168.211.103:8080/jenkins/pluginManager/advanced。 这里面最底下有个【升级站点】，把其中的链接由https改成http的就好了，http://updates.jenkins.io/update-center.json。 然后在服务列表中关闭jenkins，再tomcat重新启动，这样就能正常联网了
解决方案2：
当然，原则上也可以参考解决PKIX的第二种方式，为updates.jenkins.io生成证书并导入到JAVA_HOME/jre/lib/security目录下（留坑）
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