Properly configure a network device to be default

internal/app/wwctl/node/set/main.go

@@ -233,6 +233,24 @@ func CobraRunE(cmd *cobra.Command, args []string) error {
 			wwlog.Printf(wwlog.VERBOSE, "Node: %s:%s, Setting HW address to: %s\n", n.Id.Get(), SetNetDev, SetHwaddr)
 			n.NetDevs[SetNetDev].Hwaddr.Set(SetHwaddr)
 		}
+		if SetNetDevDefault == true {
+			if SetNetDev == "" {
+				wwlog.Printf(wwlog.ERROR, "You must include the '--netdev' option\n")
+				os.Exit(1)
+			}
+
+			if _, ok := n.NetDevs[SetNetDev]; !ok {
+				var nd node.NetDevEntry
+				n.NetDevs[SetNetDev] = &nd
+			}
+
+			wwlog.Printf(wwlog.VERBOSE, "Node: %s:%s, Setting device as default\n", n.Id.Get(), SetNetDev)
+			for _, dev := range n.NetDevs {
+				// First clear all other devices that might be configured as default
+				dev.Default.SetB(false)
+			}
+			n.NetDevs[SetNetDev].Default.SetB(true)
+		}
 
 		err := nodeDB.NodeUpdate(n)
 		if err != nil {

internal/app/wwctl/node/set/root.go

@@ -19,6 +19,7 @@ var (
 	SetGateway        string
 	SetHwaddr         string
 	SetNetDevDel      bool
+	SetNetDevDefault  bool
 	SetClusterName    string
 	SetIpxe           string
 	SetRuntimeOverlay string
@@ -66,6 +67,8 @@ func init() {
 	baseCmd.PersistentFlags().StringVarP(&SetGateway, "gateway", "G", "", "Set the node's network device gateway")
 	baseCmd.PersistentFlags().StringVarP(&SetHwaddr, "hwaddr", "H", "", "Set the node's network device HW address")
 	baseCmd.PersistentFlags().BoolVar(&SetNetDevDel, "netdel", false, "Delete the node's network device")
+	baseCmd.PersistentFlags().BoolVar(&SetNetDevDefault, "netdefault", false, "Set this network to be default")
+
 	baseCmd.PersistentFlags().BoolVarP(&SetNodeAll, "all", "a", false, "Set all nodes")
 
 	baseCmd.PersistentFlags().BoolVarP(&SetYes, "yes", "y", false, "Set 'yes' to all questions asked")