On Monday we'll be restarting the database server that supports most WMCS services.  During the restart various things will fail: Wikitech pages will fail to load, OpenStack API calls will fail, etc. In all cases if you encounter an issue you can just count to 20 and try again, by which time things will most likely be back up. Active VMs, tools and other things hosted on toolforge or cloud-VPS should be unaffected. The restart will happen at 15:00 UTC on Monday -- that's 7AM Pacific Time.