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From Robert Levas <>
Subject Re: Kadmin installation
Date Wed, 13 May 2015 17:47:09 GMT
Hi Loïc,

I am sorry it took so long to get back to you. I didn't see your question until just now.

For now, Ambari needs to be on a host in the cluster. We hope to fix this requirement soon,
but at least through Ambari 2.1, this requirement will stand.

So if you have a cluster such that the host that Ambari runs on is not port of the it, there
will be several error conditions.  For one, the Kerberos client package will not be automatically
installed.  If you happened to manually install it, then there is an issue scheduling tasks
on the Ambari server. Such tasks include generating principals using kadmin (if using the
MIT KDC option).

If you add the host that run Ambari to your cluster (before enabling Kerberos), this issues
should go away.  You might, however, need to set the host to have at least one client component
on it for the Kerberos client to be installed on it.


From: Chanel Loïc <<>>
Reply-To: "<>" <<>>
Date: Monday, May 11, 2015 at 10:29 AM
To: "<>" <<>>
Subject: Kadmin installation

Hi All,

As I was tryiing to Kerberize my cluster, I noticed something that seems weird.
Once Ambari has installed a Kerberos Client on the cluster's hosts, it tries to explore the
database, but ... The Kerberos client is not deployed on the Ambari cluster. So if a Kerberos
client has not been manually installed, the configuration of Kerberos crashes, with a message
saying there has been an error while calling  Kadmin which does not exist.

Is it normal ? Did I miss something ?



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