[Rdo-list] the hostname returned by metadata service ?

Hello, I have a question about metadata service. We set up a multi-hosts testbed on RHEL6 from RDO icehouse. Inside the instance, hostname shows as expected by the dhcp server, as shown below: [root@host-172-10-0-8 ~]# hostname -f host-172-10-0-8.openstack.bnl.gov [root@host-172-10-0-8 ~]# nslookup host-172-10-0-8.openstack.bnl.gov Server: 172.10.0.3 Address: 172.10.0.3#53 Name: host-172-10-0-8.openstack.bnl.gov Address: 172.10.0.8 But the hostname returned by metadata is different and not reachable: [root@host-172-10-0-8 ~]# curl http://169.254.169.254/latest/meta-data/hostname server-626663d6-cf90-4f2a-b888-7c3b6bdd1841.novalocal[root@host-172-10-0-8 ~]# [root@host-172-10-0-8 ~]# nslookup server-626663d6-cf90-4f2a-b888-7c3b6bdd1841.novalocal Server: 172.10.0.3 Address: 172.10.0.3#53 *** Can't find server-626663d6-cf90-4f2a-b888-7c3b6bdd1841.novalocal: No answer Note that, the hostname returned by metadata is the same as shown in the "Name" column from the "nova list" command. How can we get the metadata service return the real hostname? Thanks, Xin