################### nova.conf ########################

--dhcpbridge_flagfile=/etc/nova/nova.conf
--dhcpbridge=/usr/bin/nova-dhcpbridge
--logdir=/var/log/nova
--state_path=/var/lib/nova
--lock_path=/var/lock/nova
--force_dhcp_release=True
--use_deprecated_auth
--iscsi_helper=tgtadm
--verbose
--routing_source_ip=192.168.2.55
--sql_connection=mysql://nova:nova@127.0.0.1/nova
--libvirt_type=kvm
--glance_host=127.0.0.1
--image_service=nova.image.glance.GlanceImageService
--network_manager=nova.network.manager.FlatDHCPManager
--flat_network_dhcp_start=10.0.0.34
--flat_network_bridge=br100
--flat_injected=False
--fixed_range_v4=10.0.0.8
--network_size=8
--bridge_interfaces=br100

#########################

this is dpkg -l | grep dns


ii  dnsmasq                                2.57-1ubuntu1                           A small caching DNS proxy and DHCP/TFTP server
ii  dnsmasq-base                           2.57-1ubuntu1                           A small caching DNS proxy and DHCP/TFTP server
ii  dnsmasq-utils                          2.57-1ubuntu1                           Utilities for manipulating DHCP leases
ii  dnsutils                               1:9.7.3.dfsg-1ubuntu4                   Clients provided with BIND
ii  libdns69                               1:9.7.3.dfsg-1ubuntu4                   DNS Shared Library used by BIND
ii  libnss-mdns                            0.10-3.1ubuntu1                         NSS module for Multicast DNS name resolution