Help for networking issues

I'm running a two node openstack cloud with single NIC using nova-network, Everything seems fine but when it comes to networking there are many problems and I think thats due to having only one NIC on both nodes, first is that my instances don't connect to internet while there is a wifi that connects compute node to web and I cannot go any further with my project in this situation. Even floating ips cannot be pinged by any system except the compute host. I really need help with this stuff and I have little knowledge of networking if they can only be solved by another NIC for nodes I can think of an external usb one for both controller and compute node. Any ideas?

nova.conf network configuration on compute node:

# NETWORK
network_manager=nova.network.manager.FlatDHCPManager
force_dhcp_release=True
dhcpbridge_flagfile=/etc/nova/nova.conf
dhcpbridge=/usr/bin/nova-dhcpbridge
firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver
my_ip=10.0.1.101
public_interface=wlan0
vlan_interface=eth0
flat_network_bridge=br100
flat_interface=eth0
dnsmasq_config_file=/etc/nova/dnsmasq-nova.conf
enable_ipv6=False
#auto_assign_floating_ip=True

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The last link mentioned by SGPJ is mine.
First of all it's Two Node Neutron OVS&GRE Havana Fedora 20 Cluster.
Actually I have  to support 3 Networks.
1. External
2. Management
3. Data/VM
So Controller+Neutron Server should have at least 2 ( better 3 ) NICs, Compute should have 2 NICs.
Yes , it's possible to use one NIC for each one of mentioned networks, but only in case of low load.
Heavy network loaded clusters environment does require (2-3)+(2)

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