deprecate NetworkConfig.ClusterNetworkCIDR

pkg/cmd/server/api/types.go

@@ -611,7 +611,7 @@ type UserAgentDenyRule struct {
 // MasterNetworkConfig to be passed to the compiled in network plugin
 type MasterNetworkConfig struct {
 	NetworkPluginName    string
-	ClusterNetworkCIDR   string
+	DeprecatedClusterNetworkCIDR   string
 	ClusterNetworks []ClusterNetworkEntry
 	HostSubnetLength     uint32
 	ServiceNetworkCIDR   string

pkg/cmd/server/api/v1/conversions.go

@@ -78,6 +78,9 @@ func addDefaultingFuncs(scheme *runtime.Scheme) error {
 			}
 			setDefault_ClientConnectionOverrides(obj.MasterClients.ExternalKubernetesClientConnectionOverrides)
 
+			if len(obj.NetworkConfig.ClusterNetworks) == 0 {
+				obj.NetworkConfig.ClusterNetworks = []ClusterNetworkEntry{{CIDR: obj.NetworkConfig.DeprecatedClusterNetworkCIDR}}
+			}
 			// Populate the new NetworkConfig.ServiceNetworkCIDR field from the KubernetesMasterConfig.ServicesSubnet field if needed
 			if len(obj.NetworkConfig.ServiceNetworkCIDR) == 0 {
 				if obj.KubernetesMasterConfig != nil && len(obj.KubernetesMasterConfig.ServicesSubnet) > 0 {

pkg/cmd/server/api/v1/types.go

@@ -495,8 +495,8 @@ type RoutingConfig struct {
 type MasterNetworkConfig struct {
 	// NetworkPluginName is the name of the network plugin to use
 	NetworkPluginName string `json:"networkPluginName"`
-	// ClusterNetworkCIDR is the CIDR string to specify the global overlay network's L3 space
-	ClusterNetworkCIDR string `json:"clusterNetworkCIDR"`
+	// Deprecated and maintained for backwards compatibility, use ClusterNetworks instead
+	DeprecatedClusterNetworkCIDR string `json:"clusterNetworkCIDR,omitempty`
 	// ClusterNetworks is a list of cluster networks that defines the global overlay network's L3 space
 	ClusterNetworks []ClusterNetworkEntry `json:"clusterNetworks"`
 	// HostSubnetLength is the number of bits to allocate to each host's subnet e.g. 8 would mean a /24 network on the host