Allow Longhorn's privileged storage Pods via namespace Pod Security labels

apps/longhorn.yaml

@@ -32,5 +32,14 @@ spec:
     automated:
       prune: true
       selfHeal: true
+    # Longhorn's manager Pods need hostPath volumes and privileged mode to
+    # manage block devices directly on each node. Kubernetes' baseline Pod
+    # Security profile rejects both, so this namespace is explicitly opted
+    # into the privileged profile—scoped only to longhorn-system.
+    managedNamespaceMetadata:
+      labels:
+        pod-security.kubernetes.io/enforce: privileged
+        pod-security.kubernetes.io/audit: privileged
+        pod-security.kubernetes.io/warn: privileged
     syncOptions:
       - CreateNamespace=true