We'll be upgrading the cloud services OpenStack install on Monday,
beginning at 14:00 UTC.
The entire upgrade process may take a couple of hours. Early on in the
process, Horizon (and associated OpenStack APIs) will be disabled
(probably for 20 to 30 minutes.) There may also be brief network
interruptions during the upgrade, although if all goes well these will
not be noticeable by users.
Toolforge and existing VMs should be largely unaffected apart from
possible network hiccups.
- Andrew + the WMCS team