github.phpd.cn/hashicorp/packer@v1.3.2/builder/virtualbox/common/step_forward_ssh.go (about)

     1  package common
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  	"log"
     7  	"math/rand"
     8  	"net"
     9  
    10  	"github.com/hashicorp/packer/helper/communicator"
    11  	"github.com/hashicorp/packer/helper/multistep"
    12  	"github.com/hashicorp/packer/packer"
    13  )
    14  
    15  // This step adds a NAT port forwarding definition so that SSH is available
    16  // on the guest machine.
    17  //
    18  // Uses:
    19  //   driver Driver
    20  //   ui packer.Ui
    21  //   vmName string
    22  //
    23  // Produces:
    24  type StepForwardSSH struct {
    25  	CommConfig     *communicator.Config
    26  	HostPortMin    uint
    27  	HostPortMax    uint
    28  	SkipNatMapping bool
    29  }
    30  
    31  func (s *StepForwardSSH) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
    32  	driver := state.Get("driver").(Driver)
    33  	ui := state.Get("ui").(packer.Ui)
    34  	vmName := state.Get("vmName").(string)
    35  
    36  	if s.CommConfig.Type == "none" {
    37  		log.Printf("Not using a communicator, skipping setting up port forwarding...")
    38  		state.Put("sshHostPort", 0)
    39  		return multistep.ActionContinue
    40  	}
    41  
    42  	guestPort := s.CommConfig.Port()
    43  	sshHostPort := guestPort
    44  	if !s.SkipNatMapping {
    45  		log.Printf("Looking for available communicator (SSH, WinRM, etc) port between %d and %d",
    46  			s.HostPortMin, s.HostPortMax)
    47  
    48  		portRange := int(s.HostPortMax - s.HostPortMin + 1)
    49  		offset := rand.Intn(portRange)
    50  
    51  		for {
    52  			sshHostPort = offset + int(s.HostPortMin)
    53  			log.Printf("Trying port: %d", sshHostPort)
    54  			l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", sshHostPort))
    55  			if err == nil {
    56  				defer l.Close()
    57  				break
    58  			}
    59  			offset++
    60  			if offset == portRange {
    61  				offset = 0
    62  			}
    63  		}
    64  
    65  		// Create a forwarded port mapping to the VM
    66  		ui.Say(fmt.Sprintf("Creating forwarded port mapping for communicator (SSH, WinRM, etc) (host port %d)", sshHostPort))
    67  		command := []string{
    68  			"modifyvm", vmName,
    69  			"--natpf1",
    70  			fmt.Sprintf("packercomm,tcp,127.0.0.1,%d,,%d", sshHostPort, guestPort),
    71  		}
    72  		if err := driver.VBoxManage(command...); err != nil {
    73  			err := fmt.Errorf("Error creating port forwarding rule: %s", err)
    74  			state.Put("error", err)
    75  			ui.Error(err.Error())
    76  			return multistep.ActionHalt
    77  		}
    78  	}
    79  
    80  	// Save the port we're using so that future steps can use it
    81  	state.Put("sshHostPort", sshHostPort)
    82  
    83  	return multistep.ActionContinue
    84  }
    85  
    86  func (s *StepForwardSSH) Cleanup(state multistep.StateBag) {}