cat /etc/nova/nova.conf
    --auth_strategy=keystone
    --logdir=/var/log/nova
    --state_path=/var/lib/nova
    --lock_path=/var/lock/nova
    --verbose
    --s3_host=10.20.228.55
    --rabbit_host=46.38.227.30
    --sql_connection=mysql://novadbadmin:xxxx@46.38.227.30/nova
    --glance_api_servers=10.20.228.55:9292
    --image_service=nova.image.glance.GlanceImageService
    --libvirt_use_virtio_for_bridges
    --connection_type=libvirt
    --root_helper=sudo nova-rootwrap
    --ec2_private_dns_show_ip
    --network_manager=nova.network.manager.FlatDHCPManager
    --fixed_range=37.221.197.0/24
    --flat_network_dhcp_start=37.221.197.1
    --public_interface=eth0
    --flat_interface=eth0
    --flat_network_bridge=br100