Set sensible default for LB_PHYSICAL_INT
Configure the linux bridge physical interface to use the interface for
the default route on the current host. In the future we should consider
using a dangling interface so that we aren't affecting the host
instances networking but this roughly matches what testing has been
using in the past.
Change-Id: I7859437f97e6cab929e90208fe56f7efd62dfe01
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index b1b5230..1b7c4db 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -211,13 +211,15 @@
# Example: ``OVS_PHYSICAL_BRIDGE=br-eth1``
OVS_PHYSICAL_BRIDGE=${OVS_PHYSICAL_BRIDGE:-br-ex}
+default_route_dev=$(ip route | grep ^default | awk '{print $5}')
+die_if_not_set $LINENO default_route_dev "Failure retrieving default route device"
# With the linuxbridge agent, if using VLANs for tenant networks,
# or if using flat or VLAN provider networks, set in ``localrc`` to
# the name of the network interface to use for the physical
# network.
#
# Example: ``LB_PHYSICAL_INTERFACE=eth1``
-LB_PHYSICAL_INTERFACE=${LB_PHYSICAL_INTERFACE:-}
+LB_PHYSICAL_INTERFACE=${LB_PHYSICAL_INTERFACE:-$default_route_dev}
# When Neutron tunnels are enabled it is needed to specify the
# IP address of the end point in the local server. This IP is set