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From Robert Levas <rle...@hortonworks.com>
Subject Re: User Management with kerboes
Date Tue, 15 Aug 2017 12:30:17 GMT
Hi Xinen

Can you clarify what you are trying to (or work like to) do?

Ambari is not a general identity management system. Therefore, it does not have facilities
to create just any identity (usernames, passwords, keytabs).  It really only knows how to
create the identities that it needs for the installed services when Kerberos is enabled.

If you are trying to get around using some LDAP or Active Directory interface, you can try
the steps in the following article that shows how to create accounts using the OpenLDAP command
line utilities - https://community.hortonworks.com/articles/82544/how-to-create-ad-principal-accounts-using-openldap.html.

If you are looking to get information on what identities Ambari will create you can issue
one of a few API calls.  If Kerberos has not yet been enabled, you can get the stack-level
Kerberos descriptor (which serves as the base set of instructions for enabling Kerberos) by
issuing the following API call:

http://AMBARI_SERVER_HOST:PORT/api/v1/stacks/HDP/versions/2.6/artifacts/kerberos_descriptor
replacing AMBARI_SERVER_HOST and PORT as well as the relevant stack information.

Or more simply, if a cluster has been installed:

http://AMBARI_SERVER_HOST:PORT/api/v1/clusters/CLUSTER_NAME/kerberos_descriptors/STACK
replacing AMBARI_SERVER_HOST, PORT, and CLUSTER_NAME.

If Kerberos has already been enabled, you can get the composite Kerberos descriptor (a combination
of the base instructions with the user-suppled changes to it) by issuing the following API
call:

http://AMBARI_SERVER_HOST:PORT/api/v1/clusters/CLUSTER_NAME/kerberos_descriptors/COMPOSITE
replacing AMBARI_SERVER_HOST, PORT, and CLUSTER_NAME.

Finally, if you want to see just the user-suppled changes, you can do:

http://AMBARI_SERVER_HOST:PORT/api/v1/clusters/CLUSTER_NAME/kerberos_descriptors/USER
replacing AMBARI_SERVER_HOST, PORT, and CLUSTER_NAME.

For more information on the Kerberos descriptor, you can take a look at https://github.com/apache/ambari/blob/trunk/ambari-server/docs/security/kerberos/kerberos_descriptor.md.

For manually updating the user-supplied Kerberos descriptor, you can take a look at https://community.hortonworks.com/content/kbentry/89713/updating-the-user-sepecified-kerberos-descriptor.html.

I hope this helps,

Rob


From: Yuanxinen <yuanxinen@huawei.com>
Reply-To: "user@ambari.apache.org" <user@ambari.apache.org>
Date: Tuesday, August 15, 2017 at 4:05 AM
To: "user@ambari.apache.org" <user@ambari.apache.org>
Subject: User Management with kerboes

Hi

I would like to know about following, can somebody direct me..?



  1.  is there any REST API to create/get username and keytab..?
  2.  Or is there any custom API to implement this..?

Is it already available o going to develop in future..?



Regards
Xinen Yuan

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