github.com/rothwerx/packer@v0.9.0/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  	VNCPortMin uint
    25  	VNCPortMax uint
    26  }
    27  
    28  type VNCAddressFinder interface {
    29  	VNCAddress(uint, uint) (string, uint, error)
    30  }
    31  
    32  func (StepConfigureVNC) VNCAddress(portMin, portMax uint) (string, uint, error) {
    33  	// Find an open VNC port. Note that this can still fail later on
    34  	// because we have to release the port at some point. But this does its
    35  	// best.
    36  	var vncPort uint
    37  	portRange := int(portMax - portMin)
    38  	for {
    39  		if portRange > 0 {
    40  			vncPort = uint(rand.Intn(portRange)) + portMin
    41  		} else {
    42  			vncPort = portMin
    43  		}
    44  
    45  		log.Printf("Trying port: %d", vncPort)
    46  		l, err := net.Listen("tcp", fmt.Sprintf(":%d", vncPort))
    47  		if err == nil {
    48  			defer l.Close()
    49  			break
    50  		}
    51  	}
    52  	return "127.0.0.1", vncPort, nil
    53  }
    54  
    55  func (s *StepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
    56  	driver := state.Get("driver").(Driver)
    57  	ui := state.Get("ui").(packer.Ui)
    58  	vmxPath := state.Get("vmx_path").(string)
    59  
    60  	f, err := os.Open(vmxPath)
    61  	if err != nil {
    62  		err := fmt.Errorf("Error reading VMX data: %s", err)
    63  		state.Put("error", err)
    64  		ui.Error(err.Error())
    65  		return multistep.ActionHalt
    66  	}
    67  
    68  	vmxBytes, err := ioutil.ReadAll(f)
    69  	if err != nil {
    70  		err := fmt.Errorf("Error reading VMX data: %s", err)
    71  		state.Put("error", err)
    72  		ui.Error(err.Error())
    73  		return multistep.ActionHalt
    74  	}
    75  
    76  	var vncFinder VNCAddressFinder
    77  	if finder, ok := driver.(VNCAddressFinder); ok {
    78  		vncFinder = finder
    79  	} else {
    80  		vncFinder = s
    81  	}
    82  	log.Printf("Looking for available port between %d and %d", s.VNCPortMin, s.VNCPortMax)
    83  	vncIp, vncPort, err := vncFinder.VNCAddress(s.VNCPortMin, s.VNCPortMax)
    84  	if err != nil {
    85  		state.Put("error", err)
    86  		ui.Error(err.Error())
    87  		return multistep.ActionHalt
    88  	}
    89  
    90  	log.Printf("Found available VNC port: %d", vncPort)
    91  
    92  	vmxData := ParseVMX(string(vmxBytes))
    93  	vmxData["remotedisplay.vnc.enabled"] = "TRUE"
    94  	vmxData["remotedisplay.vnc.port"] = fmt.Sprintf("%d", vncPort)
    95  
    96  	if err := WriteVMX(vmxPath, vmxData); err != nil {
    97  		err := fmt.Errorf("Error writing VMX data: %s", err)
    98  		state.Put("error", err)
    99  		ui.Error(err.Error())
   100  		return multistep.ActionHalt
   101  	}
   102  
   103  	state.Put("vnc_port", vncPort)
   104  	state.Put("vnc_ip", vncIp)
   105  
   106  	return multistep.ActionContinue
   107  }
   108  
   109  func (StepConfigureVNC) Cleanup(multistep.StateBag) {
   110  }