feat: Add Multi-networking API

feat: Add policy_name to PlacementPolicy message within a node pool

PiperOrigin-RevId: 549032622

google/container/v1/cluster_service.proto

@@ -921,13 +921,45 @@ message NodeNetworkConfig {
   // overprovisioning is disabled.
   PodCIDROverprovisionConfig pod_cidr_overprovision_config = 13;
 
+  // We specify the additional node networks for this node pool using this list.
+  // Each node network corresponds to an additional interface
+  repeated AdditionalNodeNetworkConfig additional_node_network_configs = 14;
+
+  // We specify the additional pod networks for this node pool using this list.
+  // Each pod network corresponds to an additional alias IP range for the node
+  repeated AdditionalPodNetworkConfig additional_pod_network_configs = 15;
+
   // Output only. [Output only] The utilization of the IPv4 range for the pod.
   // The ratio is Usage/[Total number of IPs in the secondary range],
   // Usage=numNodes*numZones*podIPsPerNode.
   double pod_ipv4_range_utilization = 16
       [(google.api.field_behavior) = OUTPUT_ONLY];
 }
 
+// AdditionalNodeNetworkConfig is the configuration for additional node networks
+// within the NodeNetworkConfig message
+message AdditionalNodeNetworkConfig {
+  // Name of the VPC where the additional interface belongs
+  string network = 1;
+
+  // Name of the subnetwork where the additional interface belongs
+  string subnetwork = 2;
+}
+
+// AdditionalPodNetworkConfig is the configuration for additional pod networks
+// within the NodeNetworkConfig message
+message AdditionalPodNetworkConfig {
+  // Name of the subnetwork where the additional pod network belongs
+  string subnetwork = 1;
+
+  // The name of the secondary range on the subnet which provides IP address for
+  // this pod range
+  string secondary_pod_range = 2;
+
+  // The maximum number of pods per node which use this pod network
+  optional MaxPodsConstraint max_pods_per_node = 3;
+}
+
 // A set of Shielded Instance options.
 message ShieldedInstanceConfig {
   // Defines whether the instance has Secure Boot enabled.
@@ -3394,6 +3426,11 @@ message NodePool {
 
     // The type of placement.
     Type type = 1;
+
+    // If set, refers to the name of a custom resource policy supplied by the
+    // user. The resource policy must be in the same project and region as the
+    // node pool. If not found, InvalidArgument error is returned.
+    string policy_name = 3;
   }
 
   // The name of the node pool.
@@ -4267,6 +4304,9 @@ message NetworkConfig {
   // cluster.
   GatewayAPIConfig gateway_api_config = 16;
 
+  // Whether multi-networking is enabled for this cluster.
+  bool enable_multi_networking = 17;
+
   // Network bandwidth tier configuration.
   ClusterNetworkPerformanceConfig network_performance_config = 18;