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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
package chroot
import (
"bytes"
"context"
"fmt"
"log"
"os"
"path/filepath"
"strings"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
)
type mountPathData struct {
Device string
}
// StepMountDevice mounts the attached device.
//
// Produces:
// mount_path string - The location where the volume was mounted.
// mount_device_cleanup CleanupFunc - To perform early cleanup
type StepMountDevice struct {
MountOptions []string
MountPartition string
mountPath string
}
func (s *StepMountDevice) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ui := state.Get("ui").(packer.Ui)
device := state.Get("device").(string)
if config.NVMEDevicePath != "" {
// customizable device path for mounting NVME block devices on c5 and m5 HVM
device = config.NVMEDevicePath
}
wrappedCommand := state.Get("wrappedCommand").(CommandWrapper)
var virtualizationType string
if config.FromScratch {
virtualizationType = config.AMIVirtType
} else {
image := state.Get("source_image").(*ec2.Image)
virtualizationType = *image.VirtualizationType
log.Printf("Source image virtualization type is: %s", virtualizationType)
}
ctx := config.ctx
ctx.Data = &mountPathData{Device: filepath.Base(device)}
mountPath, err := interpolate.Render(config.MountPath, &ctx)
if err != nil {
err := fmt.Errorf("Error preparing mount directory: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
mountPath, err = filepath.Abs(mountPath)
if err != nil {
err := fmt.Errorf("Error preparing mount directory: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
log.Printf("Mount path: %s", mountPath)
if err := os.MkdirAll(mountPath, 0755); err != nil {
err := fmt.Errorf("Error creating mount directory: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
deviceMount := device
if virtualizationType == "hvm" && s.MountPartition != "0" {
deviceMount = fmt.Sprintf("%s%s", device, s.MountPartition)
}
state.Put("deviceMount", deviceMount)
ui.Say("Mounting the root device...")
stderr := new(bytes.Buffer)
// build mount options from mount_options config, useful for nouuid options
// or other specific device type settings for mount
opts := ""
if len(s.MountOptions) > 0 {
opts = "-o " + strings.Join(s.MountOptions, " -o ")
}
mountCommand, err := wrappedCommand(
fmt.Sprintf("mount %s %s %s", opts, deviceMount, mountPath))
if err != nil {
err := fmt.Errorf("Error creating mount command: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
log.Printf("[DEBUG] (step mount) mount command is %s", mountCommand)
cmd := ShellCommand(mountCommand)
cmd.Stderr = stderr
if err := cmd.Run(); err != nil {
err := fmt.Errorf(
"Error mounting root volume: %s\nStderr: %s", err, stderr.String())
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Set the mount path so we remember to unmount it later
s.mountPath = mountPath
state.Put("mount_path", s.mountPath)
state.Put("mount_device_cleanup", s)
return multistep.ActionContinue
}
func (s *StepMountDevice) Cleanup(state multistep.StateBag) {
ui := state.Get("ui").(packer.Ui)
if err := s.CleanupFunc(state); err != nil {
ui.Error(err.Error())
}
}
func (s *StepMountDevice) CleanupFunc(state multistep.StateBag) error {
if s.mountPath == "" {
return nil
}
ui := state.Get("ui").(packer.Ui)
wrappedCommand := state.Get("wrappedCommand").(CommandWrapper)
ui.Say("Unmounting the root device...")
unmountCommand, err := wrappedCommand(fmt.Sprintf("umount %s", s.mountPath))
if err != nil {
return fmt.Errorf("Error creating unmount command: %s", err)
}
cmd := ShellCommand(unmountCommand)
if err := cmd.Run(); err != nil {
return fmt.Errorf("Error unmounting root device: %s", err)
}
s.mountPath = ""
return nil
}
|
