builder/virtualbox: Create forwarded port mapping

builder/virtualbox/builder.go

@@ -26,6 +26,9 @@ type config struct {
 	ISOMD5         string `mapstructure:"iso_md5"`
 	ISOUrl         string `mapstructure:"iso_url"`
 	OutputDir      string `mapstructure:"output_directory"`
+	SSHHostPortMin uint   `mapstructure:"ssh_host_port_min"`
+	SSHHostPortMax uint   `mapstructure:"ssh_host_port_max"`
+	SSHPort        uint   `mapstructure:"ssh_port"`
 	VMName         string `mapstructure:"vm_name"`
 }
 
@@ -43,6 +46,18 @@ func (b *Builder) Prepare(raw interface{}) error {
 		b.config.OutputDir = "virtualbox"
 	}
 
+	if b.config.SSHHostPortMin == 0 {
+		b.config.SSHHostPortMin = 2222
+	}
+
+	if b.config.SSHHostPortMax == 0 {
+		b.config.SSHHostPortMax = 4444
+	}
+
+	if b.config.SSHPort == 0 {
+		b.config.SSHPort = 22
+	}
+
 	if b.config.VMName == "" {
 		b.config.VMName = "packer"
 	}
@@ -114,6 +129,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) packer
 		new(stepCreateVM),
 		new(stepCreateDisk),
 		new(stepAttachISO),
+		new(stepForwardSSH),
 	}
 
 	// Setup the state bag

builder/virtualbox/builder_test.go

@@ -38,6 +38,18 @@ func TestBuilderPrepare_Defaults(t *testing.T) {
 		t.Errorf("bad output dir: %s", b.config.OutputDir)
 	}
 
+	if b.config.SSHHostPortMin != 2222 {
+		t.Errorf("bad min ssh host port: %d", b.config.SSHHostPortMin)
+	}
+
+	if b.config.SSHHostPortMax != 4444 {
+		t.Errorf("bad max ssh host port: %d", b.config.SSHHostPortMax)
+	}
+
+	if b.config.SSHPort != 22 {
+		t.Errorf("bad ssh port: %d", b.config.SSHPort)
+	}
+
 	if b.config.VMName != "packer" {
 		t.Errorf("bad vm name: %s", b.config.VMName)
 	}

builder/virtualbox/step_attach_iso.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/packer"
-	"time"
 )
 
 // This step attaches the ISO to the virtual machine.
@@ -12,7 +11,7 @@ import (
 // Uses:
 //
 // Produces:
-type stepAttachISO struct{
+type stepAttachISO struct {
 	diskPath string
 }
 
@@ -39,7 +38,6 @@ func (s *stepAttachISO) Run(state map[string]interface{}) multistep.StepAction {
 	// Track the path so that we can unregister it from VirtualBox later
 	s.diskPath = isoPath
 
-	time.Sleep(15 * time.Second)
 	return multistep.ActionContinue
 }
 
@@ -50,8 +48,17 @@ func (s *stepAttachISO) Cleanup(state map[string]interface{}) {
 
 	driver := state["driver"].(Driver)
 	ui := state["ui"].(packer.Ui)
+	vmName := state["vmName"].(string)
 
-	if err := driver.VBoxManage("closemedium", "disk", s.diskPath); err != nil {
+	command := []string{
+		"storageattach", vmName,
+		"--storagectl", "IDE Controller",
+		"--port", "0",
+		"--device", "1",
+		"--medium", "none",
+	}
+
+	if err := driver.VBoxManage(command...); err != nil {
 		ui.Error(fmt.Sprintf("Error unregistering ISO: %s", err))
 	}
 }

builder/virtualbox/step_create_disk.go

@@ -10,9 +10,7 @@ import (
 
 // This step creates the virtual disk that will be used as the
 // hard drive for the virtual machine.
-type stepCreateDisk struct {
-	diskPath string
-}
+type stepCreateDisk struct {}
 
 func (s *stepCreateDisk) Run(state map[string]interface{}) multistep.StepAction {
 	config := state["config"].(*config)
@@ -38,9 +36,6 @@ func (s *stepCreateDisk) Run(state map[string]interface{}) multistep.StepAction
 		return multistep.ActionHalt
 	}
 
-	// Set the path so that we can delete it later
-	s.diskPath = path
-
 	// Add the IDE controller so we can later attach the disk
 	controllerName := "IDE Controller"
 	err = driver.VBoxManage("storagectl", vmName, "--name", controllerName, "--add", "ide")
@@ -66,16 +61,4 @@ func (s *stepCreateDisk) Run(state map[string]interface{}) multistep.StepAction
 	return multistep.ActionContinue
 }
 
-func (s *stepCreateDisk) Cleanup(state map[string]interface{}) {
-	if s.diskPath == "" {
-		return
-	}
-
-	driver := state["driver"].(Driver)
-	ui := state["ui"].(packer.Ui)
-
-	ui.Say("Unregistering and deleting hard disk...")
-	if err := driver.VBoxManage("closemedium", "disk", s.diskPath, "--delete"); err != nil {
-		ui.Error(fmt.Sprintf("Error deleting hard drive: %s", err))
-	}
-}
+func (s *stepCreateDisk) Cleanup(state map[string]interface{}) {}

builder/virtualbox/step_forward_ssh.go

+package virtualbox
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+	"math/rand"
+	"net"
+	"time"
+)
+
+// This step adds a NAT port forwarding definition so that SSH is available
+// on the guest machine.
+//
+// Uses:
+//
+// Produces:
+type stepForwardSSH struct{}
+
+func (s *stepForwardSSH) Run(state map[string]interface{}) multistep.StepAction {
+	config := state["config"].(*config)
+	driver := state["driver"].(Driver)
+	ui := state["ui"].(packer.Ui)
+	vmName := state["vmName"].(string)
+
+	log.Printf("Looking for available SSH port between %d and %d", config.SSHHostPortMin, config.SSHHostPortMax)
+	var sshHostPort uint
+	portRange := int(config.SSHHostPortMax - config.SSHHostPortMin)
+	for {
+		sshHostPort = uint(rand.Intn(portRange)) + config.SSHHostPortMin
+		log.Printf("Trying port: %d", sshHostPort)
+		l, err := net.Listen("tcp", fmt.Sprintf(":%d", sshHostPort))
+		if err == nil {
+			defer l.Close()
+			break
+		}
+	}
+
+	// Attach the disk to the controller
+	ui.Say(fmt.Sprintf("Creating forwarded port mapping for SSH (host port %d)", sshHostPort))
+	command := []string{
+		"modifyvm", vmName,
+		"--natpf1",
+		fmt.Sprintf("packerssh,tcp,127.0.0.1,%d,,%d", sshHostPort, config.SSHPort),
+	}
+	if err := driver.VBoxManage(command...); err != nil {
+		ui.Error(fmt.Sprintf("Error creating port forwarding rule: %s", err))
+		return multistep.ActionHalt
+	}
+
+	time.Sleep(15 * time.Second)
+	return multistep.ActionContinue
+}
+
+func (s *stepForwardSSH) Cleanup(state map[string]interface{}) {}