make controller and network be one node

Now I am trying to install juno from scratch into ubuntu 14.04 server.
I am referring to
http://docs.openstack.org/juno/install-guide/install/apt/content/ch_basic_environment.html#basics-prerequisites
About the network interface for each node, I have some questions.
1, Can I make controller and network be one node, because I want to use neutron as network component? Do I need have 2 physical NICs for controller or just 1 NIC?
2, I am considering configure my /etc/network/interfaces as follows. It this correct?
 #Controller + network node
 #1 physical NIC
 /etc/network/interfaces
        iface eth0 inet static
            address 10.0.0.11
            netmask 255.255.255.0
            gateway 10.0.0.1
       iface eth1 inet static
            address 10.0.1.11
            netmask 255.255.255.0
     iface eth2 inet manual
            up ip link set dev $IFACE up
            down ip link set dev $IFACE down

#compute node
#1 physical NIC
 /etc/network/interfaces
        iface eth0 inet static
            address 10.0.0.12
            netmask 255.255.255.0
            gateway 10.0.0.1
       iface eth1 inet static
            address 10.0.1.12
            netmask 255.255.255.0

thanks