143 lines
3.5 KiB
Go
143 lines
3.5 KiB
Go
package common
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import (
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"context"
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"fmt"
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"log"
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"math/rand"
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"github.com/hashicorp/packer-plugin-sdk/multistep"
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"github.com/hashicorp/packer-plugin-sdk/net"
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packersdk "github.com/hashicorp/packer-plugin-sdk/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 packersdk.Ui
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// vmx_path string
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//
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// Produces:
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// vnc_port int - The port that VNC is configured to listen on.
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type StepConfigureVNC struct {
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Enabled bool
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VNCBindAddress string
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VNCPortMin int
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VNCPortMax int
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VNCDisablePassword bool
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l *net.Listener
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}
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type VNCAddressFinder interface {
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VNCAddress(context.Context, string, int, int) (string, int, error)
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// UpdateVMX, sets driver specific VNC values to VMX data.
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UpdateVMX(vncAddress, vncPassword string, vncPort int, vmxData map[string]string)
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}
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func (s *StepConfigureVNC) VNCAddress(ctx context.Context, vncBindAddress string, portMin, portMax int) (string, int, error) {
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var err error
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s.l, err = net.ListenRangeConfig{
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Addr: s.VNCBindAddress,
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Min: s.VNCPortMin,
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Max: s.VNCPortMax,
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Network: "tcp",
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}.Listen(ctx)
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if err != nil {
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return "", 0, err
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}
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s.l.Listener.Close() // free port, but don't unlock lock file
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return s.l.Address, s.l.Port, nil
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}
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func VNCPassword(skipPassword bool) string {
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if skipPassword {
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return ""
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}
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length := int(8)
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charSet := []byte("012345689abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
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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(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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if !s.Enabled {
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log.Println("Skipping VNC configuration step...")
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return multistep.ActionContinue
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}
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packersdk.Ui)
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vmxPath := state.Get("vmx_path").(string)
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vmxData, err := ReadVMX(vmxPath)
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if err != nil {
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err := fmt.Errorf("Error reading VMX file: %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(ctx, 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(s.VNCDisablePassword)
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log.Printf("Found available VNC port: %s:%d", vncBindAddress, vncPort)
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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 int, 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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if len(password) > 0 {
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data["remotedisplay.vnc.password"] = password
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}
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}
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func (s *StepConfigureVNC) Cleanup(multistep.StateBag) {
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if s.l != nil {
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if err := s.l.Close(); err != nil {
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log.Printf("failed to unlock port lockfile: %v", err)
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}
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}
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}
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