Allows to configure load balancer start/end IP

cmd/minikube/cmd/config/configure.go

@@ -18,8 +18,12 @@ package config
 
 import (
 	"io/ioutil"
+	"net"
 
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"k8s.io/minikube/pkg/minikube/config"
 	"k8s.io/minikube/pkg/minikube/exit"
 	"k8s.io/minikube/pkg/minikube/out"
 	"k8s.io/minikube/pkg/minikube/service"
@@ -178,6 +182,30 @@ var addonsConfigureCmd = &cobra.Command{
 				out.WarningT("ERROR creating `registry-creds-acr` secret")
 			}
 
+		case "metallb":
+			profile := viper.GetString(config.MachineProfile)
+			cfg, err := config.Load(profile)
+			if err != nil {
+				out.ErrT(out.FatalType, "Failed to load config {{.profile}}", out.V{"profile": profile})
+			}
+
+			validator := func(s string) bool {
+				return net.ParseIP(s) != nil
+			}
+
+			if cfg.KubernetesConfig.LoadBalancerStartIP == "" {
+				cfg.KubernetesConfig.LoadBalancerStartIP = AskForStaticValidatedValue("-- Enter Load Balancer Start IP: ", validator)
+			}
+
+			if cfg.KubernetesConfig.LoadBalancerEndIP == "" {
+				cfg.KubernetesConfig.LoadBalancerEndIP = AskForStaticValidatedValue("-- Enter Load Balancer End IP: ", validator)
+			}
+
+			err = config.SaveProfile(profile, cfg)
+			if err != nil {
+				out.ErrT(out.FatalType, "Failed to save config {{.profile}}", out.V{"profile": profile})
+			}
+
 		default:
 			out.FailureT("{{.name}} has no available configuration options", out.V{"name": addon})
 			return

cmd/minikube/cmd/config/prompt.go

@@ -153,3 +153,23 @@ func posString(slice []string, element string) int {
 func containsString(slice []string, element string) bool {
 	return posString(slice, element) != -1
 }
+
+// AskForStaticValidatedValue asks for a single value to enter and check for valid input
+func AskForStaticValidatedValue(s string, validator func(s string) bool) string {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		response := getStaticValue(reader, s)
+
+		// Can't have zero length
+		if len(response) == 0 {
+			out.Err("--Error, please enter a value:")
+			continue
+		}
+		if !validator(response) {
+			out.Err("--Invalid input, please enter a value:")
+			continue
+		}
+		return response
+	}
+}

cmd/minikube/cmd/start.go

@@ -118,6 +118,8 @@ const (
 	autoUpdate              = "auto-update-drivers"
 	hostOnlyNicType         = "host-only-nic-type"
 	natNicType              = "nat-nic-type"
+	loadBalancerStartIP     = "load-balancer-start-ip"
+	loadBalancerEndIP       = "load-balancer-end-ip"
 )
 
 var (
@@ -185,6 +187,8 @@ func initKubernetesFlags() {
 	startCmd.Flags().String(apiServerName, constants.APIServerName, "The apiserver name which is used in the generated certificate for kubernetes.  This can be used if you want to make the apiserver available from outside the machine")
 	startCmd.Flags().StringArrayVar(&apiServerNames, "apiserver-names", nil, "A set of apiserver names which are used in the generated certificate for kubernetes.  This can be used if you want to make the apiserver available from outside the machine")
 	startCmd.Flags().IPSliceVar(&apiServerIPs, "apiserver-ips", nil, "A set of apiserver IP Addresses which are used in the generated certificate for kubernetes.  This can be used if you want to make the apiserver available from outside the machine")
+	startCmd.Flags().String(loadBalancerStartIP, "", "The first Load Balancer IP within a range.  This can be used if you want to set up Load Balancer (MetalLB)")
+	startCmd.Flags().String(loadBalancerEndIP, "", "The last Load Balancer IP within a range.  This can be used if you want to set up Load Balancer (MetalLB)")
 }
 
 // initDriverFlags inits the commandline flags for vm drivers
@@ -824,6 +828,8 @@ func generateCfgFromFlags(cmd *cobra.Command, k8sVersion string, drvName string)
 			ExtraOptions:           node.ExtraOptions,
 			ShouldLoadCachedImages: viper.GetBool(cacheImages),
 			EnableDefaultCNI:       selectedEnableDefaultCNI,
+			LoadBalancerStartIP:    viper.GetString(loadBalancerStartIP),
+			LoadBalancerEndIP:      viper.GetString(loadBalancerEndIP),
 		},
 		Nodes: []config.Node{cp},
 	}