github.com/marksheahan/packer@v0.10.2-0.20160613200515-1acb2d6645a0/builder/vmware/common/step_configure_vnc.go (about)

     1  package common
     2  
     3  import (
     4  	"fmt"
     5  	"io/ioutil"
     6  	"log"
     7  	"math/rand"
     8  	"net"
     9  	"os"
    10  
    11  	"github.com/mitchellh/multistep"
    12  	"github.com/mitchellh/packer/packer"
    13  )
    14  
    15  // This step configures the VM to enable the VNC server.
    16  //
    17  // Uses:
    18  //   ui     packer.Ui
    19  //   vmx_path string
    20  //
    21  // Produces:
    22  //   vnc_port uint - The port that VNC is configured to listen on.
    23  type StepConfigureVNC struct {
    24  	VNCBindAddress string
    25  	VNCPortMin     uint
    26  	VNCPortMax     uint
    27  }
    28  
    29  type VNCAddressFinder interface {
    30  	VNCAddress(string, uint, uint) (string, uint, error)
    31  }
    32  
    33  func (StepConfigureVNC) VNCAddress(vncBindAddress string, portMin, portMax uint) (string, uint, error) {
    34  	// Find an open VNC port. Note that this can still fail later on
    35  	// because we have to release the port at some point. But this does its
    36  	// best.
    37  	var vncPort uint
    38  	portRange := int(portMax - portMin)
    39  	for {
    40  		if portRange > 0 {
    41  			vncPort = uint(rand.Intn(portRange)) + portMin
    42  		} else {
    43  			vncPort = portMin
    44  		}
    45  
    46  		log.Printf("Trying port: %d", vncPort)
    47  		l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", vncBindAddress, vncPort))
    48  		if err == nil {
    49  			defer l.Close()
    50  			break
    51  		}
    52  	}
    53  	return vncBindAddress, vncPort, nil
    54  }
    55  
    56  func (s *StepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
    57  	driver := state.Get("driver").(Driver)
    58  	ui := state.Get("ui").(packer.Ui)
    59  	vmxPath := state.Get("vmx_path").(string)
    60  
    61  	f, err := os.Open(vmxPath)
    62  	if err != nil {
    63  		err := fmt.Errorf("Error reading VMX data: %s", err)
    64  		state.Put("error", err)
    65  		ui.Error(err.Error())
    66  		return multistep.ActionHalt
    67  	}
    68  
    69  	vmxBytes, err := ioutil.ReadAll(f)
    70  	if err != nil {
    71  		err := fmt.Errorf("Error reading VMX data: %s", err)
    72  		state.Put("error", err)
    73  		ui.Error(err.Error())
    74  		return multistep.ActionHalt
    75  	}
    76  
    77  	var vncFinder VNCAddressFinder
    78  	if finder, ok := driver.(VNCAddressFinder); ok {
    79  		vncFinder = finder
    80  	} else {
    81  		vncFinder = s
    82  	}
    83  	log.Printf("Looking for available port between %d and %d", s.VNCPortMin, s.VNCPortMax)
    84  	vncBindAddress, vncPort, err := vncFinder.VNCAddress(s.VNCBindAddress, s.VNCPortMin, s.VNCPortMax)
    85  	if err != nil {
    86  		state.Put("error", err)
    87  		ui.Error(err.Error())
    88  		return multistep.ActionHalt
    89  	}
    90  
    91  	log.Printf("Found available VNC port: %d", vncPort)
    92  
    93  	vmxData := ParseVMX(string(vmxBytes))
    94  	vmxData["remotedisplay.vnc.enabled"] = "TRUE"
    95  	vmxData["remotedisplay.vnc.port"] = fmt.Sprintf("%d", vncPort)
    96  	vmxData["remotedisplay.vnc.ip"] = fmt.Sprintf("%s", vncBindAddress)
    97  
    98  	if err := WriteVMX(vmxPath, vmxData); err != nil {
    99  		err := fmt.Errorf("Error writing VMX data: %s", err)
   100  		state.Put("error", err)
   101  		ui.Error(err.Error())
   102  		return multistep.ActionHalt
   103  	}
   104  
   105  	state.Put("vnc_port", vncPort)
   106  	state.Put("vnc_ip", vncBindAddress)
   107  
   108  	return multistep.ActionContinue
   109  }
   110  
   111  func (StepConfigureVNC) Cleanup(multistep.StateBag) {
   112  }