Next Tuesday we'll be performing a routine upgrade of the OpenStack
software in cloud-vps.
During the upgrade, Horizon will be disabled and many OpenStack API
calls will fail. VMs and Tools will be largely unaffected, but midway
through the upgrade there will be a very brief network interruption
which will definitely reset all network connections and may also cause
timeouts.
The entire upgrade should take around two hours.
-Andrew + the WMCS team