DOCSP-35411 -- Add K8s cluster naming convention callout (#1649)

* DOCSP-35411 -- Add K8s cluster naming convention callout

* DOCSP-35411 -- copy review revisions

* DOCSP-35411 -- copy review revisions

* DOCSP-35411 -- copy review revisions

Author: jvincent-mongodb

source/tutorial/plan-k8s-op-compatibility.txt

@@ -32,6 +32,19 @@ spans the full release series starting from the listed version.
 
 .. include:: /includes/list-tables/compatibility-k8s-os.rst
 
+.. _k8s-naming-conventions:
+
+Supported |k8s| Cluster Naming Conventions
+------------------------------------------
+
+The |k8s-op-short| supports only |k8s| cluster names that consist of 
+alphanumeric characters, dashes, underscores, and periods. 
+
+If your cluster name contains unsupported characters, you must `rename your cluster <https://kubernetes.io/docs/reference/kubectl/generated/kubectl_config/kubectl_config_rename-context/>`__ 
+to a supported name. For example, if you are deploying the |k8s-op-short| in an |aws| 
+`EKS <https://docs.aws.amazon.com/eks/latest/userguide/clusters.html>`__ cluster, you must rename the 
+cluster as the default name contains unsupported characters.
+
 .. _k8s-cncf-compatibility:
 
 Other Distributions of |k8s|