1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
package qemu
import (
"context"
"fmt"
"log"
"math/rand"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
"github.com/hashicorp/packer/packer-plugin-sdk/net"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
)
// This step configures the VM to enable the VNC server.
//
// Uses:
// config *config
// ui packersdk.Ui
//
// Produces:
// vnc_port int - The port that VNC is configured to listen on.
type stepConfigureVNC struct {
l *net.Listener
}
func VNCPassword() string {
length := int(8)
charSet := []byte("012345689abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
charSetLength := len(charSet)
password := make([]byte, length)
for i := 0; i < length; i++ {
password[i] = charSet[rand.Intn(charSetLength)]
}
return string(password)
}
func (s *stepConfigureVNC) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ui := state.Get("ui").(packersdk.Ui)
// Find an open VNC port. Note that this can still fail later on
// because we have to release the port at some point. But this does its
// best.
msg := fmt.Sprintf("Looking for available port between %d and %d on %s", config.VNCPortMin, config.VNCPortMax, config.VNCBindAddress)
ui.Say(msg)
log.Print(msg)
var vncPassword string
var err error
s.l, err = net.ListenRangeConfig{
Addr: config.VNCBindAddress,
Min: config.VNCPortMin,
Max: config.VNCPortMax,
Network: "tcp",
}.Listen(ctx)
if err != nil {
err := fmt.Errorf("Error finding VNC port: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
s.l.Listener.Close() // free port, but don't unlock lock file
vncPort := s.l.Port
if config.VNCUsePassword {
vncPassword = VNCPassword()
} else {
vncPassword = ""
}
log.Printf("Found available VNC port: %d on IP: %s", vncPort, config.VNCBindAddress)
state.Put("vnc_port", vncPort)
state.Put("vnc_password", vncPassword)
return multistep.ActionContinue
}
func (s *stepConfigureVNC) Cleanup(multistep.StateBag) {
if s.l != nil {
err := s.l.Close()
if err != nil {
log.Printf("failed to unlock port lockfile: %v", err)
}
}
}
|
