[AKS] az aks update: Add --network-dataplane option

src/azure-cli/azure/cli/command_modules/acs/_help.py

@@ -614,6 +614,12 @@
   - name: --pod-cidr
     type: string
     short-summary: Update the pod CIDR for a cluster. Used when updating a cluster from Azure CNI to Azure CNI Overlay.
+  - name: --network-dataplane
+    type: string
+    short-summary: The network dataplane to use.
+    long-summary: |
+        Network dataplane used in the Kubernetes cluster.
+        Specify "azure" to use the Azure dataplane (default) or "cilium" to enable Cilium dataplane.
   - name: --load-balancer-managed-outbound-ip-count
     type: int
     short-summary: Load balancer managed outbound IP count.

src/azure-cli/azure/cli/command_modules/acs/_params.py

@@ -328,6 +328,7 @@ def load_arguments(self, _):
         c.argument('load_balancer_idle_timeout', type=int, validator=validate_load_balancer_idle_timeout)
         c.argument('nat_gateway_managed_outbound_ip_count', type=int, validator=validate_nat_gateway_managed_outbound_ip_count)
         c.argument('nat_gateway_idle_timeout', type=int, validator=validate_nat_gateway_idle_timeout)
+        c.argument('network_dataplane', arg_type=get_enum_type(network_dataplanes))
         c.argument('outbound_type', arg_type=get_enum_type(outbound_types))
         c.argument('auto_upgrade_channel', arg_type=get_enum_type(auto_upgrade_channels))
         c.argument('cluster_autoscaler_profile', nargs='+', options_list=["--cluster-autoscaler-profile", "--ca-profile"],

src/azure-cli/azure/cli/command_modules/acs/custom.py

@@ -652,6 +652,7 @@ def aks_update(
     disable_local_accounts=False,
     enable_local_accounts=False,
     network_plugin_mode=None,
+    network_dataplane=None,
     pod_cidr=None,
     load_balancer_managed_outbound_ip_count=None,
     load_balancer_managed_outbound_ipv6_count=None,

src/azure-cli/azure/cli/command_modules/acs/managed_cluster_decorator.py

@@ -6687,6 +6687,11 @@ def update_network_plugin_settings(self, mc: ManagedCluster) -> ManagedCluster:
             _,
             _
         ) = self.context.get_pod_cidr_and_service_cidr_and_dns_service_ip_and_docker_bridge_address_and_network_policy()
+
+        network_dataplane = self.context.get_network_dataplane()
+        if network_dataplane:
+            mc.network_profile.network_dataplane = network_dataplane
+
         if pod_cidr:
             mc.network_profile.pod_cidr = pod_cidr
         return mc