Summary: Wait for VPC router nics to hotplug before assigning IPs

Detail: CLOUDSTACK-1452, CLOUDSTACK-1523 - When rebooting VPC routers, ip addr
assignment was inconsistent, sometimes the assignment would be attempted while
router was still setting up nic device. This adds a watch for the nic to show
up before attempting to add an ip to a nic.

Signed-off-by: Marcus Sorensen <marcus@betterservers.com> 1362521453 -0700

patches/systemvm/debian/config/opt/cloud/bin/vpc_guestnw.sh

@@ -129,6 +129,18 @@ desetup_passwdsvcs() {
 }
 
 create_guest_network() {
+  # need to wait for eth device to appear before configuring it
+  timer=0
+  while ! `grep -q $dev /proc/net/dev` ; do
+    logger -t cloud "$(basename $0):Waiting for interface $dev to appear, $timer seconds"
+    sleep 1;
+    if [ $timer -gt 15 ]; then
+      logger -t cloud "$(basename $0):interface $dev never appeared"
+      break
+    fi
+    timer=$[timer + 1]
+  done
+
   logger -t cloud " $(basename $0): Create network on interface $dev,  gateway $gw, network $ip/$mask "
   # setup ip configuration
   sudo ip addr add dev $dev $ip/$mask brd +

patches/systemvm/debian/config/opt/cloud/bin/vpc_ipassoc.sh

@@ -56,6 +56,18 @@ remove_routing() {
 }
 
 add_an_ip () {
+  # need to wait for eth device to appear before configuring it
+  timer=0
+  while ! `grep -q $ethDev /proc/net/dev` ; do
+    logger -t cloud "$(basename $0):Waiting for interface $ethDev to appear, $timer seconds"
+    sleep 1;
+    if [ $timer -gt 15 ]; then
+      logger -t cloud "$(basename $0):interface $ethDev never appeared"
+      break
+    fi
+    timer=$[timer + 1]
+  done
+
   logger -t cloud "$(basename $0):Adding ip $pubIp on interface $ethDev"
   sudo ip link show $ethDev | grep "state DOWN" > /dev/null
   local old_state=$?