Allow MetalLB's privileged networking Pods via namespace Pod Security labels

apps/metallb.yaml

@@ -34,5 +34,14 @@ spec:
     automated:
       prune: true
       selfHeal: true
+    # MetalLB's speaker and FRR Pods use host networking and Linux network
+    # capabilities so they can establish BGP sessions. Kubernetes' baseline
+    # Pod Security policy rejects those by design; privilege is scoped to this
+    # dedicated namespace rather than weakened cluster-wide.
+    managedNamespaceMetadata:
+      labels:
+        pod-security.kubernetes.io/enforce: privileged
+        pod-security.kubernetes.io/audit: privileged
+        pod-security.kubernetes.io/warn: privileged
     syncOptions:
       - CreateNamespace=true