Implement socket_vmnet network (QEMU)

cmd/minikube/cmd/docker-env.go

@@ -50,6 +50,7 @@ import (
 	"k8s.io/minikube/pkg/minikube/reason"
 	"k8s.io/minikube/pkg/minikube/shell"
 	"k8s.io/minikube/pkg/minikube/sysinit"
+	pkgnetwork "k8s.io/minikube/pkg/network"
 	kconst "k8s.io/minikube/third_party/kubeadm/app/constants"
 )
 
@@ -296,12 +297,12 @@ docker-cli install instructions: https://minikube.sigs.k8s.io/docs/tutorials/doc
 
 		d := co.CP.Host.Driver
 		port := constants.DockerDaemonPort
-		if driver.NeedsPortForward(driverName) && driver.IsKIC(driverName) {
+		if driver.NeedsPortForward(driverName) {
 			port, err = oci.ForwardedPort(driverName, cname, port)
 			if err != nil {
 				exit.Message(reason.DrvPortForward, "Error getting port binding for '{{.driver_name}} driver: {{.error}}", out.V{"driver_name": driverName, "error": err})
 			}
-		} else if driver.NeedsPortForward(driverName) && driverName == driver.QEMU2 {
+		} else if driver.IsQEMU(driverName) && pkgnetwork.IsUser(co.Config.Network) {
 			port = d.(*qemu.Driver).EnginePort
 		}
 

cmd/minikube/cmd/service.go

@@ -44,6 +44,7 @@ import (
 	"k8s.io/minikube/pkg/minikube/service"
 	"k8s.io/minikube/pkg/minikube/style"
 	"k8s.io/minikube/pkg/minikube/tunnel/kic"
+	pkgnetwork "k8s.io/minikube/pkg/network"
 )
 
 const defaultServiceFormatTemplate = "http://{{.IP}}:{{.Port}}"
@@ -86,9 +87,12 @@ var serviceCmd = &cobra.Command{
 		cname := ClusterFlagValue()
 		co := mustload.Healthy(cname)
 
-		// Bail cleanly for qemu2 until implemented
-		if driver.IsQEMU(co.Config.Driver) {
-			exit.Message(reason.Unimplemented, "minikube service is not currently implemented with the qemu2 driver. See https://github.com/kubernetes/minikube/issues/14146 for details.")
+		if driver.IsQEMU(co.Config.Driver) && pkgnetwork.IsUser(co.Config.Network) {
+			msg := "minikube service is not currently implemented with the user network on QEMU"
+			if runtime.GOOS == "darwin" {
+				msg += ", try starting minikube with '--network=socket_vmnet'"
+			}
+			exit.Message(reason.Unimplemented, msg)
 		}
 
 		var services service.URLs
@@ -146,10 +150,8 @@ You may select another namespace by using 'minikube service {{.service}} -n <nam
 			}
 		}
 
-		if driver.NeedsPortForward(co.Config.Driver) && driver.IsKIC(co.Config.Driver) && services != nil {
+		if driver.NeedsPortForward(co.Config.Driver) && services != nil {
 			startKicServiceTunnel(services, cname, co.Config.Driver)
-		} else if driver.NeedsPortForward(co.Config.Driver) && driver.IsQEMU(co.Config.Driver) && services != nil {
-			startQemuServiceTunnel(services, cname, co.Config.Driver)
 		} else if !serviceURLMode {
 			openURLs(data)
 		}
@@ -222,9 +224,6 @@ func startKicServiceTunnel(services service.URLs, configName, driverName string)
 	<-ctrlC
 }
 
-func startQemuServiceTunnel(services service.URLs, configName, driverName string) {
-}
-
 func mutateURLs(serviceName string, urls []string) ([]string, error) {
 	formattedUrls := make([]string, 0)
 	for _, rawURL := range urls {

cmd/minikube/cmd/start_flags.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"fmt"
+	"runtime"
 	"strings"
 	"time"
 
@@ -457,6 +458,23 @@ func getCNIConfig(cmd *cobra.Command) string {
 	return chosenCNI
 }
 
+func getNetwork(driverName string) string {
+	n := viper.GetString(network)
+	if !driver.IsQEMU(driverName) {
+		return n
+	}
+	if n == "" {
+		if runtime.GOOS == "darwin" {
+			out.WarningT("The default network for QEMU will change from 'user' to 'socket_vmnet' in a future release")
+		}
+		n = "user"
+	}
+	if n == "user" && runtime.GOOS == "darwin" {
+		out.WarningT("You are using the QEMU driver without a dedicated network, which doesn't support `minikube service` & `minikube tunnel` commands.\nTo try the experimental dedicated network see: https://minikube.sigs.k8s.io/docs/drivers/qemu/#networking")
+	}
+	return n
+}
+
 // generateNewConfigFromFlags generate a config.ClusterConfig based on flags
 func generateNewConfigFromFlags(cmd *cobra.Command, k8sVersion string, rtime string, drvName string) config.ClusterConfig {
 	var cc config.ClusterConfig
@@ -471,8 +489,8 @@ func generateNewConfigFromFlags(cmd *cobra.Command, k8sVersion string, rtime str
 		out.WarningT("--network flag is only valid with the docker/podman, KVM and Qemu drivers, it will be ignored")
 	}
 
-	if driver.IsQEMU(drvName) && viper.GetString(network) == "socket" {
-		out.WarningT("Using qemu with --network=socket for 'socket_vmnet' is experimental")
+	if driver.IsQEMU(drvName) && viper.GetString(network) == "socket_vmnet" {
+		out.WarningT("Using qemu with 'socket_vmnet' network is experimental")
 	}
 
 	checkNumaCount(k8sVersion)
@@ -485,7 +503,7 @@ func generateNewConfigFromFlags(cmd *cobra.Command, k8sVersion string, rtime str
 		EmbedCerts:              viper.GetBool(embedCerts),
 		MinikubeISO:             viper.GetString(isoURL),
 		KicBaseImage:            viper.GetString(kicBaseImage),
-		Network:                 viper.GetString(network),
+		Network:                 getNetwork(drvName),
 		Subnet:                  viper.GetString(subnet),
 		Memory:                  getMemorySize(cmd, drvName),
 		CPUs:                    getCPUCount(drvName),

cmd/minikube/cmd/tunnel.go

@@ -21,6 +21,7 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
+	"runtime"
 	"strconv"
 
 	"github.com/spf13/cobra"
@@ -38,6 +39,7 @@ import (
 	"k8s.io/minikube/pkg/minikube/style"
 	"k8s.io/minikube/pkg/minikube/tunnel"
 	"k8s.io/minikube/pkg/minikube/tunnel/kic"
+	pkgnetwork "k8s.io/minikube/pkg/network"
 )
 
 var cleanup bool
@@ -56,9 +58,12 @@ var tunnelCmd = &cobra.Command{
 		cname := ClusterFlagValue()
 		co := mustload.Healthy(cname)
 
-		// Bail cleanly for qemu2 until implemented
-		if driver.IsQEMU(co.Config.Driver) {
-			exit.Message(reason.Unimplemented, "minikube tunnel is not currently implemented with the qemu2 driver. See https://github.com/kubernetes/minikube/issues/14146 for details.")
+		if driver.IsQEMU(co.Config.Driver) && pkgnetwork.IsUser(co.Config.Network) {
+			msg := "minikube tunnel is not currently implemented with the user network on QEMU"
+			if runtime.GOOS == "darwin" {
+				msg += ", try starting minikube with '--network=socket_vmnet'"
+			}
+			exit.Message(reason.Unimplemented, msg)
 		}
 
 		if cleanup {
@@ -85,7 +90,7 @@ var tunnelCmd = &cobra.Command{
 			cancel()
 		}()
 
-		if useSSHTunnel(co.Config.Driver) {
+		if driver.NeedsPortForward(co.Config.Driver) || bindAddress != "" {
 			port, err := oci.ForwardedPort(co.Config.Driver, cname, 22)
 			if err != nil {
 				exit.Error(reason.DrvPortForward, "error getting ssh port", err)
@@ -111,16 +116,6 @@ var tunnelCmd = &cobra.Command{
 	},
 }
 
-func useSSHTunnel(driverName string) bool {
-	if !driver.IsKIC(driverName) {
-		return false
-	}
-	if driver.NeedsPortForward(driverName) {
-		return true
-	}
-	return bindAddress != ""
-}
-
 func outputTunnelStarted() {
 	out.Styled(style.Success, "Tunnel successfully started")
 	out.Ln("")

pkg/addons/addons.go

@@ -247,7 +247,7 @@ func addonSpecificChecks(cc *config.ClusterConfig, name string, enable bool, run
 	}
 
 	if name == "registry" {
-		if driver.NeedsPortForward(cc.Driver) && driver.IsKIC(cc.Driver) {
+		if driver.NeedsPortForward(cc.Driver) {
 			port, err := oci.ForwardedPort(cc.Driver, cc.Name, constants.RegistryAddonPort)
 			if err != nil {
 				return false, errors.Wrap(err, "registry port")

pkg/addons/addons_autopause.go

@@ -51,7 +51,7 @@ func enableOrDisableAutoPause(cc *config.ClusterConfig, name, val string) error
 	port := co.CP.Port // API server port
 	if enable {        // if enable, calculate the forwarded port
 		port = constants.AutoPauseProxyPort
-		if driver.NeedsPortForward(cc.Driver) && driver.IsKIC(cc.Driver) {
+		if driver.NeedsPortForward(cc.Driver) {
 			port, err = oci.ForwardedPort(cc.Driver, cc.Name, port)
 			if err != nil {
 				klog.ErrorS(err, "failed to get forwarded port for", "auto-pause port", port)

pkg/drivers/common.go

@@ -17,13 +17,17 @@ limitations under the License.
 package drivers
 
 import (
+	"bufio"
 	"fmt"
 	"io"
 	"os"
 	"path/filepath"
+	"regexp"
+	"strings"
 	"syscall"
 
 	"github.com/docker/machine/libmachine/drivers"
+	"github.com/docker/machine/libmachine/log"
 	"github.com/docker/machine/libmachine/mcnflag"
 	"github.com/docker/machine/libmachine/mcnutils"
 	"github.com/docker/machine/libmachine/ssh"
@@ -33,6 +37,11 @@ import (
 	"k8s.io/minikube/pkg/util"
 )
 
+// LeasesPath is the path to dhcpd leases
+const LeasesPath = "/var/db/dhcpd_leases"
+
+var leadingZeroRegexp = regexp.MustCompile(`0([A-Fa-f0-9](:|$))`)
+
 // This file is for common code shared among internal machine drivers
 // Code here should not be called from within minikube
 
@@ -147,3 +156,86 @@ func fixMachinePermissions(path string) error {
 	}
 	return nil
 }
+
+// DHCPEntry holds a parsed DNS entry
+type DHCPEntry struct {
+	Name      string
+	IPAddress string
+	HWAddress string
+	ID        string
+	Lease     string
+}
+
+// GetIPAddressByMACAddress gets the IP address of a MAC address
+func GetIPAddressByMACAddress(mac string) (string, error) {
+	return getIPAddressFromFile(mac, LeasesPath)
+}
+
+func getIPAddressFromFile(mac, path string) (string, error) {
+	log.Debugf("Searching for %s in %s ...", mac, path)
+	file, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	dhcpEntries, err := parseDHCPdLeasesFile(file)
+	if err != nil {
+		return "", err
+	}
+	log.Debugf("Found %d entries in %s!", len(dhcpEntries), path)
+	for _, dhcpEntry := range dhcpEntries {
+		log.Debugf("dhcp entry: %+v", dhcpEntry)
+		if dhcpEntry.HWAddress == mac {
+			log.Debugf("Found match: %s", mac)
+			return dhcpEntry.IPAddress, nil
+		}
+	}
+	return "", fmt.Errorf("could not find an IP address for %s", mac)
+}
+
+func parseDHCPdLeasesFile(file io.Reader) ([]DHCPEntry, error) {
+	var (
+		dhcpEntry   *DHCPEntry
+		dhcpEntries []DHCPEntry
+	)
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "{" {
+			dhcpEntry = new(DHCPEntry)
+			continue
+		} else if line == "}" {
+			dhcpEntries = append(dhcpEntries, *dhcpEntry)
+			continue
+		}
+
+		split := strings.SplitN(line, "=", 2)
+		if len(split) != 2 {
+			return nil, fmt.Errorf("invalid line in dhcp leases file: %s", line)
+		}
+		key, val := split[0], split[1]
+		switch key {
+		case "name":
+			dhcpEntry.Name = val
+		case "ip_address":
+			dhcpEntry.IPAddress = val
+		case "hw_address":
+			// The mac addresses have a '1,' at the start.
+			dhcpEntry.HWAddress = val[2:]
+		case "identifier":
+			dhcpEntry.ID = val
+		case "lease":
+			dhcpEntry.Lease = val
+		default:
+			return dhcpEntries, fmt.Errorf("unable to parse line: %s", line)
+		}
+	}
+	return dhcpEntries, scanner.Err()
+}
+
+// TrimMacAddress trimming "0" of the ten's digit
+func TrimMacAddress(rawUUID string) string {
+	return leadingZeroRegexp.ReplaceAllString(rawUUID, "$1")
+}

pkg/drivers/common_test.go

@@ -46,3 +46,81 @@ func Test_createDiskImage(t *testing.T) {
 		t.Errorf("Disk size is %v, want %v", fi.Size(), sizeInBytes)
 	}
 }
+
+var validLeases = []byte(`{
+        name=foo
+        ip_address=1.2.3.4
+        hw_address=1,a1:b2:c3:d4:e5:f6
+        identifier=1,a2:b3:c4:d5:e6:f7
+        lease=0x597e1267
+}
+{
+        name=bar
+        ip_address=192.168.64.3
+        hw_address=1,a4:b5:c6:d7:e8:f9
+        identifier=1,a0:b0:c0:d0:e0:f0
+        lease=0x597e1267
+}
+{
+        name=bar
+        ip_address=192.168.64.4
+        hw_address=1,a5:b6:c7:d8:e9:f1
+        identifier=1,a5:b6:c7:d8:e9:f1
+        lease=0x597e1268
+}`)
+
+func Test_getIpAddressFromFile(t *testing.T) {
+	tmpdir := tests.MakeTempDir(t)
+
+	dhcpFile := filepath.Join(tmpdir, "dhcp")
+	if err := os.WriteFile(dhcpFile, validLeases, 0644); err != nil {
+		t.Fatalf("writefile: %v", err)
+	}
+
+	invalidFile := filepath.Join(tmpdir, "invalid")
+	if err := os.WriteFile(invalidFile, []byte("foo"), 0644); err != nil {
+		t.Fatalf("writefile: %v", err)
+	}
+
+	type args struct {
+		mac  string
+		path string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    string
+		wantErr bool
+	}{
+		{
+			"valid",
+			args{"a1:b2:c3:d4:e5:f6", dhcpFile},
+			"1.2.3.4",
+			false,
+		},
+		{
+			"duplicate",
+			args{"a4:b5:c6:d7:e8:f9", dhcpFile},
+			"192.168.64.3",
+			false,
+		},
+		{
+			"invalid",
+			args{"a1:b2:c3:d4:e5:f6", invalidFile},
+			"",
+			true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := getIPAddressFromFile(tt.args.mac, tt.args.path)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("getIPAddressFromFile() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("getIPAddressFromFile() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}