Plus, my nova conf is as below:

--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

--iscsi_helper=tgtadm

--libvirt_use_virtio_for_bridges

--connection_type=libvirt

--root_helper=sudo nova-rootwrap

--verbose

--ec2_private_dns_show_ip

--quantum_use_dhcp=true

LOGS/STATE

--verbose=True

AUTHENTICATION

--auth_strategy=keystone

SCHEDULER

--compute_scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler --scheduler_default_filters=AllHostsFilter

VOLUMES

--volume_group=nova-volumes --volume_name_template=volume-%08x --iscsi_helper=tgtadm

DATABASE

--sql_connection=mysql://nova:passwd@10.131.0.244/nova

COMPUTE

--libvirt_type=kvm --connection_type=libvirt --instance_name_template=instance-%08x --api_paste_config=/etc/nova/api-paste.ini --allow_resize_to_same_host=True

--libvirt_ovs_bridge=br-int --libvirt_vif_type=ethernet --libvirt_vif_driver=nova.virt.libvirt.vif.LibvirtOpenVswitchDriver

APIS

--osapi_compute_extension=nova.api.openstack.compute.contrib.standard_extensions --ec2_dmz_host=10.131.0.244 --s3_host=10.131.0.244

RABBITMQ

--rabbit_host=localhost --rabbit_password=guest

GLANCE

--image_service=nova.image.glance.GlanceImageService --glance_api_servers=10.131.0.244:9292

NETWORK

--network_manager=nova.network.manager.FlatDHCPManager

--network_manager=nova.network.quantum.manager.QuantumManager --linuxnet_interface_driver=nova.network.linux_net.LinuxOVSInterfaceDriver --force_dhcp_release=True --dhcpbridge_flagfile=/etc/nova/nova.conf

--firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver

--my_ip=10.131.0.244 --public_interface=br100 --vlan_interface=eth0 --flat_network_bridge=br100 --flat_interface=eth0 --fixed_range=192.168.200.0/24

NOVNC CONSOLE

--novncproxy_base_url=http://10.131.0.244:6080/vnc_auto.html --vncserver_proxyclient_address=10.131.0.244 --vncserver_listen=10.131.0.244