[Users] engine-manage-domains can't add user , domain

[T-Sinjon]

I use FreeIPA to authenticate users,  ipa user-add has no problem, but when i do :

[root at ovirt-engine ~]# engine-manage-domains -action=add -domain='local' -user='tsinjon' -interactive

Error: Authentication Failed. Please verify the fully qualified domain name that is used for authentication is correct.. Problematic domain is: local
Failure while applying Kerberos configuration. Details: Authentication Failed. Please verify the fully qualified domain name that is used for authentication is correct.

and log from engine-manage-domains.log :

2012-05-14 21:58:47,892 INFO  [org.ovirt.engine.core.utils.kerberos.ManageDomains] Creating kerberos configuration for domain(s): local
2012-05-14 21:58:47,923 ERROR [org.ovirt.engine.core.dns.DnsSRVLocator] Error in getting SRV list for protocol _tcp and domain LOCAL Exception message is DNS name not found [response code 3] 

my domain is 'local'   , like ovirt-engine.local 、ovirt-node-1.local …etc

What can i do to get through it?