Open Stack

 Hello,

 I 've tried today to update my OpenStack installation to the latest 
 Ocata version.

 What I did was to shutoff all running instances, perform all updates 
 and then rebooted controller and compute nodes.

 All seemed to have finished successfully but unfortunately when I tried 
 to power on instances that had attached to them volumes (which are 
 provided by Ceph) I got the following error:

 libvirtError: unsupported configuration: Found duplicate drive address 
 for disk with target name 'sda' controller='0' bus='0' target='0' 
 unit='0'

 and the instance status now is "Error" and "No State" as a Power state.

 This happened only to the instances that already had volumes attached 
 to them. All the rest instances booted up normally.

 I have tried to reset the states of the problematic instances using: 
 nova reset-state --active $instance_id and then take a snapshot of them 
 so that I can delete and recreate them.

 Unfortunately although the state update was successful the snapshot 
 couldn't be taken because of this :

 InstanceNotRunning: Instance $instance_id is not running.


 Any ides of what can I do in order to start my instances again? Any bug 
 which is related?

 Best regards,

 G.