Ambari Kerberos - Existing AD

[#1]

Hi All,

I set up a kerberized cluster using AD, everything went fine. Next I wanted to set up Kerberos for ambari using steps below

http://docs.hortonworks.com/HDPDocuments/Ambari-2.1.0.0/bk_Ambari_Security_Guide/content/_optional_s...

The problem is I can't kadmin in my linux boxes

[root@securityLab01 ~]# kadmin

Authenticating as principal ambari-qa-securityLab/[email protected] with password. kadmin:

Client not found in Kerberos database while initializing kadmin interface

Which user can I use to use kadmin.

Thanks,

Avijeet

[#2 · Accepted solution]

Hello @Avijeet Dash ,

If you are using AD as Kerberos KDC, then you should not use kadmin to create an ambari server principal. You need to login to AD, create a user account for Ambari server. Once that is done, you can generate a keytab for this user by using this command (on AD's command prompt):

ktpass /princ [email protected] /pass <password> /mapuser ambari-server /pType KRB5_NT_PRINCIPAL /crypto ALL /out c:\temp\ambari.server.keytab

Here I've kept the name of AD user account name and Kerberos principal name same as 'ambari-server'.

Once the keytab is generated, copy it to the host running Ambari service. And follow from step #3 in the doc link that you have given in question.

Hope this helps,

Vipin

[#3]

@Avijeet Dash

For versions before Ambari 2.4.0, @Vipin Rathor's answer is correct. For Ambari 2.4.0 (and later), Ambari will do this for you when Kerberos is enabled.

[#4]

Thanks @Robert Levas @Vipin Rathor

Can we use the Ambari Views / File views etc. If Hadoop cluster is kerberized but Amabri is not?

As HDP doesn't have HUE, I am having an issue to set up a UI based access to tables etc.

[#5]

If the cluster is Kerberized, then some, if not all views, will require that Ambari's Kerberos identity is configured. This is so the views can authenticate to the relevant services.