This repository has been archived by the owner on May 26, 2021. It is now read-only.
forked from hashicorp/packer
-
Notifications
You must be signed in to change notification settings - Fork 1
/
step_forward_ssh.go
73 lines (63 loc) · 1.75 KB
/
step_forward_ssh.go
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
package common
import (
"fmt"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
"log"
"math/rand"
"net"
)
// This step adds a NAT port forwarding definition so that SSH is available
// on the guest machine.
//
// Uses:
// driver Driver
// ui packer.Ui
// vmName string
//
// Produces:
type StepForwardSSH struct {
GuestPort uint
HostPortMin uint
HostPortMax uint
}
func (s *StepForwardSSH) Run(state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packer.Ui)
vmName := state.Get("vmName").(string)
log.Printf("Looking for available SSH port between %d and %d",
s.HostPortMin, s.HostPortMax)
var sshHostPort uint
var offset uint = 0
portRange := int(s.HostPortMax - s.HostPortMin)
if portRange > 0 {
// Have to check if > 0 to avoid a panic
offset = uint(rand.Intn(portRange))
}
for {
sshHostPort = offset + s.HostPortMin
log.Printf("Trying port: %d", sshHostPort)
l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", sshHostPort))
if err == nil {
defer l.Close()
break
}
}
// Create a forwarded port mapping to the VM
ui.Say(fmt.Sprintf("Creating forwarded port mapping for SSH (host port %d)", sshHostPort))
command := []string{
"modifyvm", vmName,
"--natpf1",
fmt.Sprintf("packerssh,tcp,127.0.0.1,%d,,%d", sshHostPort, s.GuestPort),
}
if err := driver.VBoxManage(command...); err != nil {
err := fmt.Errorf("Error creating port forwarding rule: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Save the port we're using so that future steps can use it
state.Put("sshHostPort", sshHostPort)
return multistep.ActionContinue
}
func (s *StepForwardSSH) Cleanup(state multistep.StateBag) {}