139 lines
3.6 KiB
Go
139 lines
3.6 KiB
Go
package chroot
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/aws/aws-sdk-go/service/ec2"
|
|
"github.com/mitchellh/multistep"
|
|
"github.com/mitchellh/packer/packer"
|
|
"github.com/mitchellh/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
|
|
|
|
mountPath string
|
|
}
|
|
|
|
func (s *StepMountDevice) Run(state multistep.StateBag) multistep.StepAction {
|
|
config := state.Get("config").(*Config)
|
|
ui := state.Get("ui").(packer.Ui)
|
|
image := state.Get("source_image").(*ec2.Image)
|
|
device := state.Get("device").(string)
|
|
wrappedCommand := state.Get("wrappedCommand").(CommandWrapper)
|
|
|
|
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
|
|
}
|
|
|
|
log.Printf("Source image virtualization type is: %s", *image.VirtualizationType)
|
|
deviceMount := device
|
|
if *image.VirtualizationType == "hvm" {
|
|
deviceMount = fmt.Sprintf("%s%d", device, 1)
|
|
}
|
|
state.Put("deviceMount", deviceMount)
|
|
|
|
ui.Say("Mounting the root device...")
|
|
stderr := new(bytes.Buffer)
|
|
|
|
// build mount options from mount_options config, usefull 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
|
|
}
|
|
|
|
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
|
|
}
|