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From "Robert Joseph Evans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2858) MRv2 WebApp Security
Date Fri, 21 Oct 2011 14:38:32 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13132707#comment-13132707

Robert Joseph Evans commented on MAPREDUCE-2858:


I would gladly use Hamlet to generate the pages, but I had a difficult time finding documentation
on how to do it at all.  I can see now after reading through HtmlPage that there is a Hamlet
constructor that takes a PrintWriter, but I am still rather confused with all the generics
and subclassing what I need to do to make it work properly.  In HtmlPage it is subclassing
Hamlet along with the _ class and overriding the subView method who's javadocs says.

   * Sub-classes should override this to do something interesting.
   * @param cls the sub-view class

It appears that the default implementation will print out invalid HTML just describing the
class that is a sub view, while the HtmlPage implementation will actually render the SubView,
which I would consider to be interesting.  I suppose I don't need SubViews so I probably could
just use it directly without subclassing, but it seems unsafe to me.

Is there an easier way to use Hamlet then to subclass the various parts of it? I wasn't sure
how to set up the WebApp bindings correctly if I wanted to use that to give me the proxy either.
 Would "/:app.id/:check/*" work? I don't see wildcards in a path spec like that being used
with route anywhere.  If you could provide some code/hints that would really be great. 
> MRv2 WebApp Security
> --------------------
>                 Key: MAPREDUCE-2858
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2858
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: applicationmaster, mrv2, security
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Luke Lu
>            Assignee: Robert Joseph Evans
>            Priority: Blocker
>             Fix For: 0.23.0
>         Attachments: MR-2858-branch-0.23.txt, MR-2858-branch-0.23.txt, MR-2858.txt, MR-2858.txt
> In MRv2, while the system servers (ResourceManager (RM), NodeManager (NM) and NameNode
(NN)) run as "trusted"
> system users, the application masters (AM) run as users who submit the application. While
this offers great flexibility
> to run multiple version of mapreduce frameworks (including their UI) on the same Hadoop
cluster, it has significant
> implication for the security of webapps (Please do not discuss company specific vulnerabilities
> Requirements:
> # Secure authentication for AM (for app/job level ACLs).
> # Webapp security should be optional via site configuration.
> # Support existing pluggable single sign on mechanisms.
> # Should not require per app/user configuration for deployment.
> # Should not require special site-wide DNS configuration for deployment.
> This the top jira for webapp security. A design doc/notes of threat-modeling and counter
measures will be posted on the wiki.

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