Add AKS workload cluster known issue

Author: sethmanheim

AKS-Hybrid/TOC.yml

@@ -142,6 +142,8 @@
       href: cluster-k8s-version.md
     - name: Deleted cluster still visible in portal
       href: deleted-cluster-visible.md
+    - name: Can't fully remove workload cluster with PodDisruptionBudget (PDB) resources
+      href: delete-cluster-pdb.md
     - name: Kubernetes version x.x.x is not available
       href: webhook-denied-request.md
   - name: Reference

AKS-Hybrid/delete-cluster-pdb.md

@@ -0,0 +1,48 @@
+---
+title: Troubleshoot deleted workload cluster resources can't be deleted
+description: Learn how to troubleshoot when deleted workload cluster resources can't be deleted.
+ms.topic: troubleshooting
+author: sethmanheim
+ms.author: sethm
+ms.date: 11/18/2024
+ms.reviewer: leslielin
+
+---
+
+# Workload cluster with PodDisruptionBudget (PDB) resources can't be fully removed
+
+[!INCLUDE [hci-applies-to-23h2](includes/hci-applies-to-23h2.md)]
+
+When you delete a workload cluster that has [PodDisruptionBudget](https://kubernetes.io/docs/tasks/run-application/configure-pdb/) (PDB) resources, the deletion might fail to remove the PDB resources. By default, PDB is installed in the Workload Identity-enabled AKS Arc cluster.
+
+## Workaround
+
+Before you delete the AKS Arc cluster, access the target cluster's **kubeconfig** and delete the PDB:
+
+1. Access the target cluster:
+
+   ```azurecli
+   az connectedk8s proxy -n $aks_cluster_name -g $resource_group_name 
+   ```
+
+1. Verify PDB:
+
+   ```bash
+   kubectl get pdb -A 
+   ```
+
+1. Delete PDB:
+
+    ```bash
+    kubectl delete pdb azure-wi-webhook-controller-manager -n arc-workload-identity 
+    ```
+
+1. Delete cluster:
+
+    ```azurecli
+    az aksarc delete -n $aks_cluster_name -g $resource_group_name
+    ```
+
+## Next steps
+
+[Known issues in AKS enabled by Azure Arc](aks-known-issues.md)