Add --vm flag for users who want to autoselect only VM's

cmd/minikube/cmd/start.go

@@ -194,6 +194,7 @@ func initDriverFlags() {
 	startCmd.Flags().String("driver", "", fmt.Sprintf("Driver is one of: %v (defaults to auto-detect)", driver.DisplaySupportedDrivers()))
 	startCmd.Flags().String("vm-driver", "", "DEPRECATED, use `driver` instead.")
 	startCmd.Flags().Bool(disableDriverMounts, false, "Disables the filesystem mounts provided by the hypervisors")
+	startCmd.Flags().Bool("vm", false, "Filter to use only VM Drivers")
 
 	// kvm2
 	startCmd.Flags().String(kvmNetwork, "default", "The KVM network name. (kvm2 driver only)")
@@ -465,7 +466,7 @@ func selectDriver(existing *config.ClusterConfig) registry.DriverState {
 		return ds
 	}
 
-	pick, alts := driver.Suggest(driver.Choices())
+	pick, alts := driver.Suggest(driver.Choices(viper.GetBool("vm")))
 	if pick.Name == "" {
 		exit.WithCodeT(exit.Config, "Unable to determine a default driver to use. Try specifying --driver, or see https://minikube.sigs.k8s.io/docs/start/")
 	}

pkg/minikube/driver/driver.go

@@ -164,8 +164,8 @@ func FlagDefaults(name string) FlagHints {
 }
 
 // Choices returns a list of drivers which are possible on this system
-func Choices() []registry.DriverState {
-	options := registry.Available()
+func Choices(vm bool) []registry.DriverState {
+	options := registry.Available(vm)
 
 	// Descending priority for predictability and appearance
 	sort.Slice(options, func(i, j int) bool {

pkg/minikube/driver/driver_test.go

@@ -162,7 +162,7 @@ func TestSuggest(t *testing.T) {
 				}
 			}
 
-			got := Choices()
+			got := Choices(false)
 			gotNames := []string{}
 			for _, c := range got {
 				gotNames = append(gotNames, c.Name)

pkg/minikube/registry/global.go

@@ -24,6 +24,40 @@ import (
 	"github.com/golang/glog"
 )
 
+const (
+	// Podman is Kubernetes in container using podman driver
+	Podman = "podman"
+	// Docker is Kubernetes in container using docker driver
+	Docker = "docker"
+	// Mock driver
+	Mock = "mock"
+	// None driver
+	None = "none"
+)
+
+// IsKIC checks if the driver is a kubernetes in container
+func IsKIC(name string) bool {
+	return name == Docker || name == Podman
+}
+
+// IsMock checks if the driver is a mock
+func IsMock(name string) bool {
+	return name == Mock
+}
+
+// IsVM checks if the driver is a VM
+func IsVM(name string) bool {
+	if IsKIC(name) || IsMock(name) || BareMetal(name) {
+		return false
+	}
+	return true
+}
+
+// BareMetal returns if this driver is unisolated
+func BareMetal(name string) bool {
+	return name == None || name == Mock
+}
+
 var (
 	// globalRegistry is a globally accessible driver registry
 	globalRegistry = newRegistry()
@@ -59,7 +93,7 @@ func Driver(name string) DriverDef {
 }
 
 // Available returns a list of available drivers in the global registry
-func Available() []DriverState {
+func Available(vm bool) []DriverState {
 	sts := []DriverState{}
 	glog.Infof("Querying for installed drivers using PATH=%s", os.Getenv("PATH"))
 
@@ -76,7 +110,13 @@ func Available() []DriverState {
 			priority = Unhealthy
 		}
 
-		sts = append(sts, DriverState{Name: d.Name, Priority: priority, State: s})
+		if vm {
+			if IsVM(d.Name) {
+				sts = append(sts, DriverState{Name: d.Name, Priority: priority, State: s})
+			}
+		} else {
+			sts = append(sts, DriverState{Name: d.Name, Priority: priority, State: s})
+		}
 	}
 
 	// Descending priority for predictability

pkg/minikube/registry/global_test.go

@@ -102,7 +102,7 @@ func TestGlobalAvailable(t *testing.T) {
 		},
 	}
 
-	if diff := cmp.Diff(Available(), expected); diff != "" {
+	if diff := cmp.Diff(Available(false), expected); diff != "" {
 		t.Errorf("available mismatch (-want +got):\n%s", diff)
 	}
 }