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From Pallavi Palleti <pallavi.pall...@corp.aol.com>
Subject Re: Remote access to cluster using user as hadoop
Date Thu, 30 Jul 2009 11:32:58 GMT
Hi all,

I have made changes to the hadoop-0.18.2 code to allow hadoop super user access only from
some specified IP Range. If it is untrusted IP, it throws an exception. I would like to add
it as a patch so that people can use it if needed in their environment. Can some one tell
me what is the procedure to create a patch? I could see from trunk code that there is some
work related to it happening. Especially, I am looking at Server.java code (PrivilegedActionException
being thrown for untrusted user I believe).Can some one please clarify if it is written for
the purpose that we are discussing(validating whether it is trusted super user from a specific
remote IP)? If it is not, then I would like to add my patch.


----- Original Message -----
From: "Ted Dunning" <ted.dunning@gmail.com>
To: common-user@hadoop.apache.org
Sent: Friday, July 24, 2009 6:22:12 AM GMT +05:30 Chennai, Kolkata, Mumbai, New Delhi
Subject: Re: Remote access to cluster using user as hadoop

Interesting approach.

My guess is that this would indeed protect the datanodes from accidental
"attack" by stopping access before they are involved.

You might also consider just changing the name of the magic hadoop user to
something that is more unlikely.  The name "hadoop" is not far off what
somebody might come up with as a user name for experimenting or running
scheduled jobs.

On Thu, Jul 23, 2009 at 3:28 PM, Ian Holsman <lists@holsman.net> wrote:

> I was thinking of alternatives similar to creating a proxy nameserver that
> non-privileged users can attach to that forwards those to the "real"
> nameserver or just hacking the nameserver so that it switches "hadoop" to
> "hadoop_remote" for sessions from untrusted IP's.
> not being familiar with the code, I am presuming that there is a point
> where the code determines the userID. can anyone point me to that bit?
> I just want to hack it to  downgrade superusers, and it doesn't have to be
> too clean or work for every edge case. it's more to stop accidental
> problems.

Ted Dunning, CTO

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