I’m using rancher 2.0.6 to manage K8 clusters for services.
Whilst our use is currently in its infancy, I am looking at the long-term management of our rancher service - and that includes upgrades to the rancher service itself.
If I upgrade a standard single-node instance of rancher, then all clusters go off-line [briefly] before coming back up - which means all services running on those clusters become unavailable.
This is a hefty down-time penalty to consider.
I’ve tried a small HA install, and the K8s it controlled also became unavailable.
Are there any plans to look at some form of rolling update to clusters, so services can remain 24/7?