Hi @vihansh reddy, about the cluster not having access to the internet, some operations in Orchest pretty much require one; the most auxiliary ones (i.e. checking if a new version is out) fail gracefully but some core functionality, like building environment images, require internet access, unless you are willing to go through a lot of hoops by pre building images, pushing them to the container runtime of each node in the cluster, etc. And making this work properly in Orchest would be a feature in itself
About on premise no GKE/EKS clusters, if it's multi node there are no explicit instructions to do so, although it's probably better if @Yannick pitches in here