Openstack Folsom cant ping instance/VM

The most annoying bug that I came across when setting up Openstack Folsom was that, after creating the a virtual machine it was not able to reach the metadata service and I was not able to reach the virtual machine.

After days of debugging, I found out that it was not only me that was having the same issue. Finally it was reported as a known bug to the openstack developers.

https://bugs.launchpad.net/neutron/+bug/1091605

The problem seems to be that OpenvSwitch devices have been brought back up after after rebooting.  Hence before I upgraded to Grizzily from Folsom, I created the following script and had it running at the boot-up in the network node.

 #!/bin/sh  
   
 #  
 # This script fixes the following bug.  
 # Has to run after reboot.  
 # Bug: https://bugs.launchpad.net/quantum/+bug/1091605  
 #  
 #  
 # Chathura S. Magurawalage  
   
 ((  
 #Check for root permissions  
 # Make sure only root can run our script  
 if [ "$(id -u)" != "0" ]; then  
   echo "This script must be run as root"  
   exit 1  
 fi  
   
 BRIDGE=${BRIDGE:-br0}  
   
 while getopts b:hv option  
 do   
   case "${option}"  
   in  
     b) BRIDGE=${OPTARG};;  
      v) set -x;;  
     h) cat <<EOF   
 Usage: $0 [-b bridge_name]  
   
 Add -v for verbose mode, -h to display this message.  
 EOF  
 exit 0  
 ;;  
      \?) echo "Use -h for help"  
        exit 1;;  
   esac  
 done  
   
 ovs-vsctl del-br br-int  
 ovs-vsctl del-br br-ex  
 ovs-vsctl add-br br-int  
 ovs-vsctl add-br br-ex  
 ovs-vsctl add-port br-ex $BRIDGE  
 ip link set up br-ex  
   
 service quantum-plugin-openvswitch-agent restart  
 service quantum-dhcp-agent restart  
 service quantum-l3-agent restart  
   
 )) 2>&1 | tee $0.log