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For a downstream cluster? Did you enable authorised cluster endpoint?

Thank you for the hint! I found out that by default

local_cluster_auth_endpoint

is set to

false

and this has been the reason. By the way using Rancher UI i don`t found a option to select it. I directly edit YAML of cluster using Rancher Edit option.

In the UI it's a selectable option. In slightly different places depending if it's rke1 or rke2

Thank you. I double check now and I found it under

Cluster Management->Networking

! Strange is that menu is visible only if i select new version of K8s itself. If i just open Edit screen

Network

menu is missing,

Add-On config

is empty...

Which version of Rancher and what cluster type is that?

Rancher v2.6.8 RKE2

Which node driver?

Custom installation on premise, Calico