unistack-org/cloudinit
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fix partition resize

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Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
This commit is contained in:
Василий Толстов 2015-04-05 17:03:28 +03:00
parent 616b356754
commit 81de7a1151
1 changed files with 34 additions and 22 deletions
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56
system/filesystem_linux.go
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@ -41,6 +41,17 @@ func ResizeRootFS() error {
partstart := "2048"
device := mountpoint[:len(mountpoint)-1]
partition := mountpoint[len(mountpoint)-1:]
mbr := make([]byte, 446)
f, err := os.OpenFile(device, os.O_RDONLY, os.FileMode(0400))
if err != nil {
return err
}
_, err = io.ReadFull(f, mbr)
f.Close()
if err != nil {
return err
}
cmd := exec.Command("fdisk", "-l", "-u", device)
stdout, err = cmd.StdoutPipe()
@ -82,25 +93,31 @@ func ResizeRootFS() error {
stdin.Reset()
w, err := os.OpenFile(device, os.O_WRONLY, 0600)
if err == nil {
defer w.Close()
err = ioctl.BlkRRPart(w.Fd())
if err == nil {
return exec.Command("resize2fs", device+partition).Run()
}
if err != nil {
return err
}
_, err = w.Write(mbr)
if err != nil {
return err
}
args := []string{}
for _, name := range []string{"partx", "partprobe", "kpartx"} {
if _, err = exec.LookPath(name); err == nil {
switch name {
case "partx":
args = []string{"-u", device}
default:
args = []string{device}
err = ioctl.BlkRRPart(w.Fd())
w.Close()
if err != nil {
args := []string{}
for _, name := range []string{"partx", "partprobe", "kpartx"} {
if _, err = exec.LookPath(name); err == nil {
switch name {
case "partx":
args = []string{"-u", device}
default:
args = []string{device}
}
log.Printf("update partition table via %s %s", name, strings.Join(args, " "))
if err = exec.Command(name, args...).Run(); err == nil {
break
}
}
log.Printf("update partition table via %s %s", name, strings.Join(args, " "))
exec.Command(name, args...).Run()
}
}
log.Printf("resize filesystem via %s %s", "resize2fs", device+partition)
@ -108,10 +125,5 @@ func ResizeRootFS() error {
if err != nil {
return err
}
for _, name := range []string{"grub-install", "grub2-install"} {
if _, err = exec.LookPath(name); err == nil {
log.Printf("reinstall grub %s %s", name, device)
exec.Command(name, device).Run()
}
}
return nil
}