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https://issues.apache.org/jira/browse/BIGTOP-1326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14233394#comment-14233394
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Konstantin Boudnik commented on BIGTOP-1326:
--------------------------------------------
Absolutely. I just wanted to make sure that I am not dropping this ;) Thanks
> iTest Shell does fully work under root user only
> ------------------------------------------------
>
> Key: BIGTOP-1326
> URL: https://issues.apache.org/jira/browse/BIGTOP-1326
> Project: Bigtop
> Issue Type: Bug
> Components: documentation, tests
> Affects Versions: 0.8.0
> Reporter: Martin Bukatovic
> Assignee: Martin Bukatovic
> Fix For: 0.9.0
>
> Attachments: BIGTOP-1326.1.patch
>
>
> When you specify different effective user for a shell object, eg:
> {noformat}
> Shell shHDFS = new Shell("/bin/bash", "hdfs")
> {noformat}
> It will try to run the following command to do it:
> {noformat}
> sudo -u hdfs PATH=$PATH /bin/bash
> {noformat}
> For reference, this is defined in
> {{bigtop-test-framework/src/main/groovy/org/apache/bigtop/itest/shell/Shell.groovy}}
> on by:
> {noformat}
> def proc = user ? "sudo -u $user PATH=${System.getenv('PATH')}
> $shell".execute() : "$shell".execute()
> {noformat}
> This means that without further sudo configuration, such code would only work
> if you are running it under root (edited for clarity).
> To run it under user {{bigtop}} who is single member of group bigtop, you need
> to add the following sudo configuration file into {{/etc/sudoers.d}}
> directory:
> {noformat}
> Defaults env_keep += "PATH"
> Defaults exempt_group = bigtop
> bigtop ALL= (root) NOPASSWD: /bin/bash
> bigtop ALL= (hdfs) NOPASSWD: /bin/bash
> {noformat}
> The first two lines allows bigtop user to pass PATH env variable to process
> executed via sudo.
> Since sudo (and for quite good reasons) redefines enviroment variables of the
> process it executes (see {{env_reset}} sudoers option) and morevoer sets PATH
> to
> predefined safe value (see {{secure_path}} sudoers option), first two lines
> are
> needed:
> * first line allows passing PATH in general, but it doesn't have any effect
> alone alone because of {{secure_path}} which always redefines it anyway
> * second line allows users of group bigtop to pass or redefine PATH
> enviroment
> variable, but it doesn't work without the first line
> In addition, when you do this sudo configuration, you don't need to set PATH
> explicitelly as done in previous example, but the PATH is passed by default
> (but only for members of bigtop group), so this is enough:
> {noformat}
> sudo -u hdfs /bin/bash
> {noformat}
> On the other hand we can't remove explicit passing of PATH variable, because
> it would break it for the root user.
> So I propose the following:
> * discuss this if workflow is ok to be declared as official way how to use
> iTest shell object under non root users
> * then I will attach a patch for documention this in some README file
> (any ideas where it would be best to add it?)
> * does it make sense to run most of the bigtop tests under non root user
> until there is a good reason to use another one? I think that running tests
> under root user by default is not optimal because of the complexity of hadoop
> environment.
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