On Mon, 2012-04-30 at 14:51 -0700, David Copperfield wrote:
Hi folks,
During migration existing Kerberos/LDAP setup clients to IPA, after
'ipa-client-install' command is run and reports successful migration,
we found that the client fails to talk with IPA server.
The symptom is: in the /var/log/messages file at IPA client side, we
can see the following entries:
Apr 30 11:07:04 ldapclient02 sssd: Starting up
Apr 30 11:07:05 ldapclient02 sssd[be[pegaclouds.com]]:
Starting up
Apr 30 11:07:06 ldapclient02 sssd[pam]: Starting up
Apr 30 11:07:06 ldapclient02 sssd[nss]: Starting up
Apr 30 11:07:06 ldapclient02 [sssd[ldap_child[2133]]]: Failed
to initialize credentials using keytab [(null)]: Decrypt integrity
check failed. Unable to create GSSAPI-encrypted LDAP connection.
It is figured out that, instead of backup and
overwrite /etc/krb5.keytab, ipa-client-install only appends the new
generated host keytab entries to the same file /etc/krb5.keytab. Then
when the original entries have a higher KVNO version than the newly
generated siblings, the latter is shadowed and ignored.
After manual removing the old entries from /etc/krb5.keytab with the
tool ktutil (rkt, delent, wkt), the client immdiately connects to IPA
server and problem goes away. It will be greatly appreciated if native
ipa-rmkeytab can be extended to do the same job.
Actually, this was a bug in SSSD that has now been fixed in the RHEL 6.3
beta. It's related to https://bugzilla.redhat.com/show_bug.cgi?id=805281
Please give that a try and see if it resolves your issue.
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