@@ -9,6 +9,18 @@ XTRACE=$(set +o | grep xtrace)

 set +o xtrace

+# Exit 0 if address is in network or 1 if

+# address is not in network or netaddr library

+# is not installed.

+function address_in_net() {

+    python -c "

+import netaddr

+import sys

+sys.exit(netaddr.IPAddress('$1') not in netaddr.IPNetwork('$2'))

+"

+}

+

+

 # apt-get wrapper to set arguments correctly

 # apt_get operation package [package ...]

 function apt_get() {

@@ -279,13 +279,30 @@ INSTANCE_NAME_PREFIX=${INSTANCE_NAME_PREFIX:-instance-}

 # cases.

 SCHEDULER=${SCHEDULER:-nova.scheduler.filter_scheduler.FilterScheduler}

-HOST_IP_IFACE=${HOST_IP_IFACE:-eth0}

-# Use the eth0 IP unless an explicit is set by ``HOST_IP`` environment variable

+# Set fixed and floating range here so we can make sure not to use addresses

+# from either range when attempting to guess the ip to use for the host

+FIXED_RANGE=${FIXED_RANGE:-10.0.0.0/24}

+FLOATING_RANGE=${FLOATING_RANGE:-172.24.4.224/28}

+

+# Find the interface used for the default route

+HOST_IP_IFACE=${HOST_IP_IFACE:-$(ip route | sed -n '/^default/{ s/.*dev \(\w\+\)\s\+.*/\1/; p; }')}

+# Search for an IP unless an explicit is set by ``HOST_IP`` environment variable

 if [ -z "$HOST_IP" -o "$HOST_IP" == "dhcp" ]; then

-    HOST_IP=`LC_ALL=C ip -f inet addr show ${HOST_IP_IFACE} | awk '/inet/ {split($2,parts,"/");  print parts[1]}' | head -n1`

-    if [ "$HOST_IP" = "" ]; then

+    HOST_IP=""

+    HOST_IPS=`LC_ALL=C ip -f inet addr show ${HOST_IP_IFACE} | awk '/inet/ {split($2,parts,"/");  print parts[1]}'`

+    for IP in $HOST_IPS; do

+        # Attempt to filter out ip addresses that are part of the fixed and

+        # floating range. Note that this method only works if the 'netaddr'

+        # python library is installed. If it is not installed, an error

+        # will be printed and the first ip from the interface will be used.

+        if ! (address_in_net $IP $FIXED_RANGE || address_in_net $IP $FLOATING_RANGE); then

+            HOST_IP=$IP

+            break;

+        fi

+    done

+    if [ "$HOST_IP" == "" ]; then

         echo "Could not determine host ip address."

-        echo "Either localrc specified dhcp on ${HOST_IP_IFACE} or defaulted to eth0"

+        echo "Either localrc specified dhcp on ${HOST_IP_IFACE} or defaulted"

         exit 1

     fi

 fi

@@ -364,11 +381,8 @@ else

 fi

 PUBLIC_INTERFACE=${PUBLIC_INTERFACE:-$PUBLIC_INTERFACE_DEFAULT}

-PUBLIC_INTERFACE=${PUBLIC_INTERFACE:-br100}

-FIXED_RANGE=${FIXED_RANGE:-10.0.0.0/24}

 FIXED_NETWORK_SIZE=${FIXED_NETWORK_SIZE:-256}

 NETWORK_GATEWAY=${NETWORK_GATEWAY:-10.0.0.1}

-FLOATING_RANGE=${FLOATING_RANGE:-172.24.4.224/28}

 NET_MAN=${NET_MAN:-FlatDHCPManager}

 EC2_DMZ_HOST=${EC2_DMZ_HOST:-$SERVICE_HOST}

 FLAT_NETWORK_BRIDGE=${FLAT_NETWORK_BRIDGE:-$FLAT_NETWORK_BRIDGE_DEFAULT}