Open Stack

I have deployed openstack-ansible (queens) and everything working
great but now i want to change "novalocal" suffix when i build
instance.

This is what i have tired and none of them work.

1. put dhcp_domain = example.com in /etc/nova/nova.conf
2. put dns_domain = example.com in neutron server
3. put dhcp_domain = example.com in dhcp_agent.ini

In short i have tried all possible option but still my instance
picking foo.novalocal in /etc/hostname

I can use #cloud-config to make it change but i want to make it
default alway use my own domain name.

what i am missing here.