YUBI LEE created AMBARI-25891:
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             Summary: Enhancements when regenerating keytabs and changing 
Kerberos configurations
                 Key: AMBARI-25891
                 URL: https://issues.apache.org/jira/browse/AMBARI-25891
             Project: Ambari
          Issue Type: Bug
          Components: ambari-sever
    Affects Versions: 2.7.7, 2.7.6
            Reporter: YUBI LEE
            Assignee: YUBI LEE


In short, when regenerating keytabs or changing configuration in Kerberos tab 
in side bar,  ambari-server will changes configurations which are different 
from ones in kerberos.json of stack.
It is caused by missing query parameter, {{config_update_policy=none}}. (refer 
to 
https://github.com/apache/ambari/blob/release-2.7.6/ambari-web/app/utils/ajax/ajax.js#L1985)
And also, I think it should allow administrators to choose whether to generate 
only missing keytabs when they change configuration in Kerberos tab. It should 
use {{regenerateKeytabs}} instead of {{restartServicesAfterRegenerate}}. 
(https://github.com/apache/ambari/blob/release-2.7.6/ambari-web/app/controllers/main/admin/kerberos.js#L575)

I will make a PR about this issue soon!



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