Hi,
I've added a new set of flavors on Cloud VPS.[0] The new flavors are almost identical to the existing `g3` flavors - the only difference is that instances on the new `g4` flavors get scheduled on hypervisors running more modern networking software.[1] When creating new instances, either by hand or via some automated means, please use the new flavors from now on. Using g3 flavors for new instances will be disabled in the coming days.
We will be migrating existing VMs to the new flavors at some point in the near future. This will most likely involve briefly shutting down each VM as it's migrated from one network agent to the other. There will be a dedicated announcement for that once the timeline on that is more certain. As always, if your project needs some coordination before restarting things or this is otherwise a problem, feel free to contact us.[2]
Migrating a g3 instance to a g4 flavor (or the other way around) without manual intervention would instead make that instance inaccessible. For that reason instance resizing has temporarily been disabled, if you need to resize an existing instance for whatever reason before it's been migrated please contact us.
[0]: https://wikitech.wikimedia.org/wiki/Help:Cloud_VPS_Instances#Instance_inform... [1]: https://phabricator.wikimedia.org/T364458 [2]: https://wikitech.wikimedia.org/wiki/Help:Cloud_Services_communication
Taavi