add binary-mirror flag to start cmd

cmd/minikube/cmd/start_flags.go

@@ -132,6 +132,7 @@ const (
 	listenAddress           = "listen-address"
 	extraDisks              = "extra-disks"
 	certExpiration          = "cert-expiration"
+	binaryMirror            = "binary-mirror"
 )
 
 var (
@@ -189,6 +190,7 @@ func initMinikubeFlags() {
 	startCmd.Flags().StringP(trace, "", "", "Send trace events. Options include: [gcp]")
 	startCmd.Flags().Int(extraDisks, 0, "Number of extra disks created and attached to the minikube VM (currently only implemented for hyperkit and kvm2 drivers)")
 	startCmd.Flags().Duration(certExpiration, constants.DefaultCertExpiration, "Duration until minikube certificate expiration, defaults to three years (26280h).")
+	startCmd.Flags().String(binaryMirror, "", "Location to fetch kubectl, kubelet, & kubeadm binaries from.")
 }
 
 // initKubernetesFlags inits the commandline flags for Kubernetes related options
@@ -490,6 +492,7 @@ func generateNewConfigFromFlags(cmd *cobra.Command, k8sVersion string, drvName s
 		MountPort:               uint16(viper.GetUint(mountPortFlag)),
 		MountType:               viper.GetString(mountTypeFlag),
 		MountUID:                viper.GetString(mountUID),
+		BinaryMirror:            viper.GetString(binaryMirror),
 		KubernetesConfig: config.KubernetesConfig{
 			KubernetesVersion:      k8sVersion,
 			ClusterName:            ClusterFlagValue(),
@@ -707,6 +710,7 @@ func updateExistingConfigFromFlags(cmd *cobra.Command, existing *config.ClusterC
 	updateUint16FromFlag(cmd, &cc.MountPort, mountPortFlag)
 	updateStringFromFlag(cmd, &cc.MountType, mountTypeFlag)
 	updateStringFromFlag(cmd, &cc.MountUID, mountUID)
+	updateStringFromFlag(cmd, &cc.BinaryMirror, binaryMirror)
 
 	if cmd.Flags().Changed(kubernetesVersion) {
 		cc.KubernetesConfig.KubernetesVersion = getKubernetesVersion(existing)

pkg/minikube/config/types.go

@@ -95,6 +95,7 @@ type ClusterConfig struct {
 	MountPort               uint16
 	MountType               string
 	MountUID                string
+	BinaryMirror            string // Mirror location for kube binaries (kubectl, kubelet, & kubeadm)
 }
 
 // KubernetesConfig contains the parameters used to configure the VM Kubernetes.