/usr/share/pyshared/nova/virt/interfaces.template is in python-nova 2012.1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | # Injected by Nova on instance boot
#
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
#for $ifc in $interfaces
auto ${ifc.name}
iface ${ifc.name} inet static
address ${ifc.address}
netmask ${ifc.netmask}
broadcast ${ifc.broadcast}
gateway ${ifc.gateway}
#if $ifc.dns
dns-nameservers ${ifc.dns}
#end if
#if $use_ipv6
iface ${ifc.name} inet6 static
address ${ifc.address_v6}
netmask ${ifc.netmask_v6}
gateway ${ifc.gateway_v6}
#end if
#end for
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