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https://issues.apache.org/jira/browse/AMBARI-9227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14287894#comment-14287894
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vitthal (Suhas) Gogate commented on AMBARI-9227:
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-- I don't understand why ulimit check fails w/ permission error where
"ambari-server start" command runs as root. I guess this check can be even
better suited to be in "ambari-server setup".
-- Also when Ambari server changes the open file limit for specific user, it
should seek user consent before the change.
--Suhas
> ambari-server startup with non-root user causes a ulimit error Operation not
> permitted.
> ---------------------------------------------------------------------------------------
>
> Key: AMBARI-9227
> URL: https://issues.apache.org/jira/browse/AMBARI-9227
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Reporter: jun aoki
> Priority: Minor
> Fix For: 2.0.0
>
>
> When you are starting ambari-server with non-root users (you can set so
> during amari-server setup (1)), it attempts to modify ulimit -n (the max open
> files to ) 10000 by default, you get a permission error. (2)
> Bad thing is the server process is started "successfully" without actually
> effecting the max number of open file descriptor. (some non user friendly
> error is shown though)
> Our customers tend to run applications with an non-root user so we'd like to
> clean up here a bit.
> The challenge is, ulimit is a bash command like 'cd', and only root can
> execute. See (3) to find ulimit behavior.
> My possible solution is
> 1. if root user, do the current behavior
> 2. if non-root, then the startup checks ulimit -a and if the current max
> number meets the requirement, if it does not meet, the server startup halts.
> End users have to fix through limits.conf.
> Let me know if this works.
> (1) setup to customize ambari daemon user
> {code}
> bash-4.1# ambari-server setup
> Using python /usr/bin/python2.6
> Setup ambari-server
> Checking SELinux...
> SELinux status is 'disabled'
> Customize user account for ambari-server daemon [y/n] (n)? y
> Enter user account for ambari-server daemon (root):pivotal
> {code}
> (2) permission error
> {code}
> bash-4.1# ambari-server start
> Using python /usr/bin/python2.6
> Starting ambari-server
> Ambari Server running with 'root' privileges.
> Organizing resource files at /var/lib/ambari-server/resources...
> Server PID at: /var/run/ambari-server/ambari-server.pid
> Server out at: /var/log/ambari-server/ambari-server.out
> Server log at: /var/log/ambari-server/ambari-server.log
> Waiting for server start....sh: line 0: ulimit: open files: cannot modify
> limit: Operation not permitted
> ................
> Ambari Server 'start' completed successfully.
> {code}
> (3)
> {code}
> [root@node1 init.d]# where ulimit
> -bash: where: command not found
> [root@node1 init.d]# sudo ulimit
> sudo: ulimit: command not found
> [root@node1 init.d]# ulimit
> unlimited
> {code}
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