Maintenance of hosts when running Rancher on vSphere without DRS

Hi all,

I want to know how you manage the maintenance of your ESXi hosts when running Rancher on vSphere WITHOUT DRS.

The Rancher-Cluster we use is configured to run on specific hosts.

We have now run into problems, when upgrading the ESXi hosts firmware, etc. The Rancher-Cluster was no longer scaleable and crashed in the end.

Do you guys have any best-practice approaches during upgrades?

I will post our approach when we find something that works for us.

Thanks in Advance!