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https://issues.apache.org/jira/browse/MAPREDUCE-2858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13132707#comment-13132707
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Robert Joseph Evans commented on MAPREDUCE-2858:
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@Luke,
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.
{quote}
* Sub-classes should override this to do something interesting.
* @param cls the sub-view class
{quote}
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 here).
> 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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