如何解决远程节点上Jenkins的java.nio.file.AccessDeniedException？

Question

我创建了一个沙箱项目，并希望在远程代理上运行其声明式管道。我看到 Jenkins 和代理之间的 SSH 连接正在运行。Jenkins 可以登录远程计算机（以用户身份ec2-user）。但执行最终出现异常：java.nio.file.AccessDeniedException: /srv/www/htdocs/sandbox@tmp。

代理的根目录（Jenkins 在其中创建remoting.jar）是/srv/www/htdocs/jenkins-agents。项目的根目录（作为 传递到管道parameter）是/srv/www/htdocs/sandbox。但詹金斯似乎尝试创建一个新文件夹：/srv/www/htdocs/sandbox@tmp. 这是行不通的，因为父文件夹/srv/www/htdocs有一些访问限制，并且仅允许在其中创建新目录root/ sudo users。

为什么 Jenkins 尝试创建这个@tmp文件夹？如何避免这种行为并使其发挥作用？

---

附加信息

执行 CLI 命令失败并显示以下控制台输出：

Started by user admin
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] Start of Pipeline
[Pipeline] node
Running on Produktivserver in /srv/www/htdocs/jenkins-agents/workspace/Sandbox
[Pipeline] {
[Pipeline] ws
Running in /srv/www/htdocs/sandbox
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Build)
[Pipeline] sh
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // ws
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to Produktivserver
        at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1788)
        at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
        at hudson.remoting.Channel.call(Channel.java:998)
        at hudson.FilePath.act(FilePath.java:1069)
        at hudson.FilePath.act(FilePath.java:1058)
        at hudson.FilePath.mkdirs(FilePath.java:1243)
        at org.jenkinsci.plugins.durabletask.FileMonitoringTask$FileMonitoringController.<init>(FileMonitoringTask.java:198)
        at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:337)
        at org.jenkinsci.plugins.durabletask.BourneShellScript$ShellController.<init>(BourneShellScript.java:326)
        at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:178)
        at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:103)
        at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:317)
        at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:286)
        at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:179)
        at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:122)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
        at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:163)
        at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
        at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:157)
        at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:161)
        at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:165)
        at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:135)
        at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
        at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:86)
        at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:113)
        at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:83)
        at jdk.internal.reflect.GeneratedMethodAccessor187.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
        at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
        at com.cloudbees.groovy.cps.Next.step(Next.java:83)
        at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
        at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
        at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:129)
        at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:268)
        at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
        at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
        at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:51)
        at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:185)
        at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:400)
        at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$400(CpsThreadGroup.java:96)
        at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:312)
        at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:276)
        at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:67)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
        at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
        at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
java.nio.file.AccessDeniedException: /srv/www/htdocs/sandbox@tmp
    at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
    at java.base/sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:389)
    at java.base/java.nio.file.Files.createDirectory(Files.java:689)
    at java.base/java.nio.file.Files.createAndCheckIsDirectory(Files.java:796)
    at java.base/java.nio.file.Files.createDirectories(Files.java:782)
    at hudson.FilePath.mkdirs(FilePath.java:3256)
    at hudson.FilePath.access$1300(FilePath.java:211)
    at hudson.FilePath$Mkdirs.invoke(FilePath.java:1251)
    at hudson.FilePath$Mkdirs.invoke(FilePath.java:1247)
    at hudson.FilePath$FileCallableWrapper.call(FilePath.java:3069)
    at hudson.remoting.UserRequest.perform(UserRequest.java:211)
    at hudson.remoting.UserRequest.perform(UserRequest.java:54)
    at hudson.remoting.Request$2.run(Request.java:369)
    at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Finished: FAILURE

Answer 1

解决方案是让 Jenkins 的工作区文件夹的父级可写，或者更准确地说，对于 Jenkins 登录远程计算机的用户来说，可写。这是一种非常简单（但不安全）的方法（对于工作区文件夹/path/parent/project和临时文件夹/path/parent/project@tmp）：

$ chmod 777 /path/parent/