[jira] [Created] (AMBARI-21846) Transparent Huge Pages check using wrong file CentOS 7

["Bruno Lavoie (JIRA)" <ji...@apache.org>]

Bruno Lavoie created AMBARI-21846:
-------------------------------------

             Summary: Transparent Huge Pages check using wrong file CentOS 7
                 Key: AMBARI-21846
                 URL: https://issues.apache.org/jira/browse/AMBARI-21846
             Project: Ambari
          Issue Type: Bug
          Components: ambari-agent
         Environment: CentOS 7.x
Ambari 2.5.1 - Hortonworks
            Reporter: Bruno Lavoie
            Priority: Minor


In ambari_agent/HostInfo.py, the file used to check Transparent Huge Pages for RedHat family is: /sys/kernel/mm/redhat_transparent_hugepage/enabled

But it appears to be /sys/kernel/mm/transparent_hugepage/enabled for CentOS 7.

{code}
# cat /etc/redhat-release          
CentOS Linux release 7.3.1611 (Core) 

# cat /sys/kernel/mm/redhat_transparent_hugepage/enabled
cat: /sys/kernel/mm/redhat_transparent_hugepage/enabled: No such file or directory

# cat /sys/kernel/mm/transparent_hugepage/enabled
[always] madvise never
{code}

No warnings when configuring hosts for a fresh cluster while I didn't disabled THP. Found it suspect and stumbled into this issue.

Maybe the code must be more tailored for managing CentOS vs RedHat.
I don't have any RHEL to check if it changed there too.



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