Change the openstack1_IP to the IP address of the machine where you are setting these components.

#nova.conf file for single node, FlatDHCP networking with keystone
--verbose=true
--allow_admin_api=true
--use_deprecated_auth=false

#logging and other administrative
--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

#network
--network_manager=nova.network.manager.FlatDHCPManager
--public_interface=eth0
--flat_interface=eth0
--flat_network_bridge=br100
--fixed_range=172.16.0.0/16
--flat_network_dhcp_start=172.16.0.2
--network_size=255
--flat_injected=false

#vnc
--vncproxy_url=http://openstack1_IP:6080
--vncproxy_wwwroot=/var/lib/nova/noVNC/

#scheduler
--scheduler_driver=nova.scheduler.simple.SimpleScheduler

#glance
--image_service=nova.image.glance.GlanceImageService
--glance_api_servers=openstack1_IP:9292
#rabbit
--rabbit_host=openstack1_IP

#nova database
--sql_connection=mysql://nova:notnova@openstack1_IP/nova
#volumes
--volume_group=nova-volumes
--aoe_eth_dev=eth0
--iscsi_ip_prefix=172.16.