Create a namespace for CoCalc in your Kubernetes cluster. Throughout the guide it will be cocalc:

kubectl create namespace cocalc

→ expected output: namespace/cocalc created

Besides that, the entire deployment is namespace agnostic, so you can use any namespace you like.

You can even deploy several instances alongside each other in different namespaces. In that case, the only thing you really need to take care of is to not re-use the same PVCs and to use different database names – such that all instances do not interfere with each other.