139 lines
3.4 KiB
Go
139 lines
3.4 KiB
Go
package common
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import (
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"fmt"
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"io/ioutil"
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"log"
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"math/rand"
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"net"
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"os"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/packer"
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)
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// This step configures the VM to enable the VNC server.
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//
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// Uses:
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// ui packer.Ui
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// vmx_path string
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//
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// Produces:
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// vnc_port uint - The port that VNC is configured to listen on.
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type StepConfigureVNC struct {
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VNCBindAddress string
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VNCPortMin uint
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VNCPortMax uint
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}
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type VNCAddressFinder interface {
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VNCAddress(string, uint, uint) (string, uint, error)
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// UpdateVMX, sets driver specific VNC values to VMX data.
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UpdateVMX(vncAddress, vncPassword string, vncPort uint, vmxData map[string]string)
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}
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func (StepConfigureVNC) VNCAddress(vncBindAddress string, portMin, portMax uint) (string, uint, error) {
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// Find an open VNC port. Note that this can still fail later on
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// because we have to release the port at some point. But this does its
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// best.
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var vncPort uint
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portRange := int(portMax - portMin)
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for {
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if portRange > 0 {
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vncPort = uint(rand.Intn(portRange)) + portMin
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} else {
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vncPort = portMin
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}
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log.Printf("Trying port: %d", vncPort)
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l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", vncBindAddress, vncPort))
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if err == nil {
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defer l.Close()
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break
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}
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}
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return vncBindAddress, vncPort, nil
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}
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func VNCPassword() string {
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length := int(8)
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charSet := []byte("1234567890-=qwertyuiop[]asdfghjkl;zxcvbnm,./!@#%^*()_+QWERTYUIOP{}|ASDFGHJKL:XCVBNM<>?")
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charSetLength := len(charSet)
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password := make([]byte, length)
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for i := 0; i < length; i++ {
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password[i] = charSet[rand.Intn(charSetLength)]
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}
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return string(password)
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}
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func (s *StepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packer.Ui)
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vmxPath := state.Get("vmx_path").(string)
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f, err := os.Open(vmxPath)
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if err != nil {
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err := fmt.Errorf("Error reading VMX data: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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vmxBytes, err := ioutil.ReadAll(f)
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if err != nil {
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err := fmt.Errorf("Error reading VMX data: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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var vncFinder VNCAddressFinder
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if finder, ok := driver.(VNCAddressFinder); ok {
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vncFinder = finder
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} else {
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vncFinder = s
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}
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log.Printf("Looking for available port between %d and %d", s.VNCPortMin, s.VNCPortMax)
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vncBindAddress, vncPort, err := vncFinder.VNCAddress(s.VNCBindAddress, s.VNCPortMin, s.VNCPortMax)
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if err != nil {
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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vncPassword := VNCPassword()
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log.Printf("Found available VNC port: %d", vncPort)
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vmxData := ParseVMX(string(vmxBytes))
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vncFinder.UpdateVMX(vncBindAddress, vncPassword, vncPort, vmxData)
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if err := WriteVMX(vmxPath, vmxData); err != nil {
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err := fmt.Errorf("Error writing VMX data: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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state.Put("vnc_port", vncPort)
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state.Put("vnc_ip", vncBindAddress)
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state.Put("vnc_password", vncPassword)
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return multistep.ActionContinue
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}
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func (StepConfigureVNC) UpdateVMX(address, password string, port uint, data map[string]string) {
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data["remotedisplay.vnc.enabled"] = "TRUE"
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data["remotedisplay.vnc.port"] = fmt.Sprintf("%d", port)
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data["remotedisplay.vnc.ip"] = address
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data["remotedisplay.vnc.password"] = password
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}
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func (StepConfigureVNC) Cleanup(multistep.StateBag) {
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}
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