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From Manoj Samel <manoj.sa...@gmail.com>
Subject Ways to manage user accounts on hadoop cluster when using kerberos security
Date Tue, 07 Jan 2014 22:55:41 GMT
Hi,

>From the documentation + code,  "when kerberos is enabled, all tasks are
run as the end user (e..g as user "joe" and not as hadoop user "mapred")
using the task-controller (which is setuid root and when it runs, it does a
setuid/setgid etc. to Joe and his groups ). For this to work, user "joe"
linux account has to be present on all nodes of the cluster."

In a environment with large and dynamic user population; it is not
practical to add every end user to every node of the cluster (and drop user
when end user is deactivated etc.)

What are other options get this working ?

I am assuming that if the users are in a LDAP, can using the PAM for LDAP
solve the issue.

Any other suggestions?

-- 
Thanks,

Manoj

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