docs(guides) Document namespace migration

Signed-off-by: Hristo Hristov <[email protected]>

content/en/docs/guides/namespace-migration-across-tenants.md

@@ -4,10 +4,10 @@ weight: 2
 description: "A Step-by-Step Guide to Namespace Migration"
 ---
 Capsule relays on two components to associate given namespace with tenant.
-- Namespace's OwnerReference pointing to the Tenant defintion
-- Namespace's label capsule.clastix.io/tenant
+- Namespace's OwnerReference.name pointing to the Tenant defintion
+- Namespace's OwnerReference.uid pointing to the Tenant defintion
 
-If a cluster administrator changes the Namespace by matching the other Tenant with the proper UID and name, along with the labels, the Namespace can be easily transferred.
+If a cluster administrator changes the Namespace by matching the other Tenant with the proper UID and name, the Namespace can be easily transferred.
 
 ```bash
 kubectl get tenants
@@ -17,18 +17,14 @@ NAME    STATE    NAMESPACE QUOTA   NAMESPACE COUNT   NODE SELECTOR   AGE
 solar   Active                     1                                 46s
 wind    Active                     1                                 39s
 ```
-Get namespace's labels and metadata.uid.
+Get tenant's metadata.uid.
 ```bash
-kubectl get ns -l capsule.clastix.io/tenant --show-labels
 kubectl get tnt wind -o jsonpath='{.metadata.uid}'
 ```
 ```
-NAME     STATUS   AGE   LABELS
-ns-bar   Active   28s   capsule.clastix.io/tenant=wind,kubernetes.io/metadata.name=ns-bar
-ns-foo   Active   36s   capsule.clastix.io/tenant=solar,kubernetes.io/metadata.name=ns-foo
 0df8e9ee-5f6f-40a4-897d-b80d349ca36f%
 ```
-While altering ownerReferences name is sufficient on its own, it's highly recommended to edit the UID and labels to match the output of the previous commands.
+While altering ownerReferences name is sufficient on its own, it's highly recommended to edit the UID to match the output of the previous commands.
 ```bash
 kubectl edit ns ns-foo 
 ```