Automatically add extra options for none driver on ubuntu

cmd/minikube/cmd/start.go

@@ -29,6 +29,8 @@ import (
 	"strings"
 	"time"
 
+	"k8s.io/minikube/pkg/minikube/drivers/none"
+
 	"github.com/blang/semver"
 	"github.com/docker/machine/libmachine"
 	"github.com/docker/machine/libmachine/host"
@@ -350,6 +352,11 @@ func validateConfig() {
 		exit.Usage("Sorry, the --hidden feature is currently only supported with --vm-driver=kvm2")
 	}
 
+	err := autoSetOptions(viper.GetString(vmDriver))
+	if err != nil {
+		glog.Errorf("Error autoSetOptions : %v", err)
+	}
+
 	// check that kubeadm extra args contain only whitelisted parameters
 	for param := range extraOptions.AsMap().Get(kubeadm.Kubeadm) {
 		if !pkgutil.ContainsString(kubeadm.KubeadmExtraArgsWhitelist[kubeadm.KubeadmCmdParam], param) &&
@@ -486,6 +493,17 @@ func generateConfig(cmd *cobra.Command, k8sVersion string) (cfg.Config, error) {
 	return cfg, nil
 }
 
+// autoSetOptions sets the options needed for specific configuration automatically.
+func autoSetOptions(vmDriver string) error {
+	//  options for none driver
+	if vmDriver == constants.DriverNone {
+		if o := none.AutoOptions(); o != "" {
+			return extraOptions.Set(o)
+		}
+	}
+	return nil
+}
+
 // prepareNone prepares the user and host for the joy of the "none" driver
 func prepareNone() {
 	if viper.GetBool(cfg.WantNoneDriverWarning) {

pkg/minikube/drivers/none/driver.go

@@ -18,6 +18,7 @@ package none
 
 import (
 	"fmt"
+	"os"
 
 	"github.com/docker/machine/libmachine/drivers"
 	"k8s.io/minikube/pkg/drivers/none"
@@ -47,3 +48,13 @@ func createNoneHost(config cfg.MachineConfig) interface{} {
 		ContainerRuntime: config.ContainerRuntime,
 	})
 }
+
+// AutoOptions returns suggested extra options based on the current config
+func AutoOptions() string {
+	// for more info see: https://github.com/kubernetes/minikube/issues/3511
+	f := "/run/systemd/resolve/resolv.conf"
+	if _, err := os.Stat(f); err != nil {
+		return ""
+	}
+	return fmt.Sprintf("kubelet.resolv-conf=%s", f)
+}