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Peng Yu

2014-May-12 02:40 UTC

[Libguestfs] How to expand a partition (along with the filesystem on it) on a device?

Hi,

I want to expand /dev/sda5 so that it takes the remaining space in
/dev/sda. But virt-resize does not work. Does anybody know how to make
it work? Thanks.

$ sudo virt-filesystems --long -h --all -a saiph.qcow2
Name                 Type       VFS     Label MBR Size Parent
/dev/sda1            filesystem ext2    -     -   243M -
/dev/sda2            filesystem unknown -     -   1.0K -
/dev/mintaka-vg/root filesystem ext4    -     -   7.8G -
/dev/mintaka-vg/root lv         -       -     -   7.8G /dev/mintaka-vg
/dev/mintaka-vg      vg         -       -     -   7.8G /dev/sda5
/dev/sda5            pv         -       -     -   7.8G -
/dev/sda1            partition  -       -     83  243M /dev/sda
/dev/sda2            partition  -       -     05  1.0K /dev/sda
/dev/sda5            partition  -       -     8e  7.8G /dev/sda
/dev/sda             device     -       -     -   50G  -
$ sudo virt-filesystems --long -h --all -a saiph_expand.qcow2
Name                 Type       VFS     Label MBR Size Parent
/dev/sda1            filesystem ext2    -     -   243M -
/dev/sda2            filesystem unknown -     -   1.0K -
/dev/mintaka-vg/root filesystem ext4    -     -   7.8G -
/dev/mintaka-vg/root lv         -       -     -   7.8G /dev/mintaka-vg
/dev/mintaka-vg      vg         -       -     -   7.8G /dev/sda5
/dev/sda5            pv         -       -     -   7.8G -
/dev/sda1            partition  -       -     83  243M /dev/sda
/dev/sda2            partition  -       -     05  1.0K /dev/sda
/dev/sda5            partition  -       -     8e  7.8G /dev/sda
/dev/sda             device     -       -     -   50G  -

$ sudo virt-resize -d --expand /dev/sda5 saiph.qcow2 saiph_expand.qcow2
command line: virt-resize -d --expand /dev/sda5 saiph.qcow2 saiph_expand.qcow2
Examining saiph.qcow2 ...
libguestfs: trace: add_drive "saiph.qcow2" "readonly:true"
libguestfs: trace: add_drive = 0
libguestfs: trace: add_drive "saiph_expand.qcow2"
"readonly:false"
libguestfs: trace: add_drive = 0
libguestfs: trace: launch
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: trace: launch = 0
libguestfs: trace: lvm_set_filter "/dev/sda"
libguestfs: trace: lvm_set_filter = 0
libguestfs: trace: feature_available "ntfsprogs ntfs3g"
libguestfs: trace: feature_available = 1
libguestfs: trace: feature_available "btrfs"
libguestfs: trace: feature_available = 1
libguestfs: trace: blockdev_getss "/dev/sdb"
libguestfs: trace: blockdev_getss = 512
libguestfs: trace: blockdev_getsize64 "/dev/sda"
libguestfs: trace: blockdev_getsize64 = 53687091200
libguestfs: trace: blockdev_getsize64 "/dev/sdb"
libguestfs: trace: blockdev_getsize64 = 53687091200
libguestfs: trace: part_get_parttype "/dev/sda"
libguestfs: trace: part_get_parttype = "msdos"
saiph.qcow2 size 53687091200 bytes
saiph_expand.qcow2 size 53687091200 bytes
partition table type: msdos
libguestfs: trace: pvs_full
libguestfs: trace: pvs_full = <struct guestfs_lvm_pv_list *>
libguestfs: trace: part_list "/dev/sda"
libguestfs: trace: part_list = <struct guestfs_partition_list *>
libguestfs: trace: part_get_bootable "/dev/sda" 1
libguestfs: trace: part_get_bootable = 1
libguestfs: trace: part_get_mbr_id "/dev/sda" 1
libguestfs: trace: part_get_mbr_id = 131
libguestfs: trace: vfs_type "/dev/sda1"
libguestfs: trace: vfs_type = "ext2"
libguestfs: trace: mount_ro "/dev/sda1" "/"
libguestfs: trace: mount_ro = 0
libguestfs: trace: statvfs "/"
libguestfs: trace: statvfs = <struct guestfs_statvfs *>
libguestfs: trace: part_get_bootable "/dev/sda" 2
libguestfs: trace: part_get_bootable = 0
libguestfs: trace: part_get_mbr_id "/dev/sda" 2
libguestfs: trace: part_get_mbr_id = 5
libguestfs: trace: lvs
libguestfs: trace: lvs = ["/dev/mintaka-vg/root"]
libguestfs: trace: vfs_type "/dev/mintaka-vg/root"
libguestfs: trace: vfs_type = "ext4"
libguestfs: trace: mount_ro "/dev/mintaka-vg/root" "/"
libguestfs: trace: mount_ro = 0
libguestfs: trace: statvfs "/"
libguestfs: trace: statvfs = <struct guestfs_statvfs *>
2 partitions found
/dev/sda1:
    partition data: 1 1048576-255852543 (254803968 bytes)
    bootable: true
    partition ID: 0x83
    content: filesystem ext2 (246755328 bytes)
/dev/sda2:
    partition data: 2 256900096-8588886015 (8331985920 bytes)
    bootable: false
    partition ID: 0x5
    content: extended partition
1 logical volumes found
/dev/mintaka-vg/root:
    content: filesystem ext4 (8130584576 bytes)
calculate surplus: outsize=53687091200 required=8586789888
overhead=2326528 surplus=45097974784
libguestfs: trace: canonical_device_name "/dev/sda5"
libguestfs: trace: canonical_device_name = "/dev/sda5"
surplus before --expand or --shrink: 45097974784
virt-resize: error: /dev/sda5: partition not found in the source disk
image (this error came from '--expand' option on the command line).
Try running this command: virt-filesystems --partitions --long -a
saiph.qcow2

If reporting bugs, run virt-resize with the '-d' option and include the
complete output.
libguestfs: trace: close
libguestfs: trace: internal_autosync
libguestfs: trace: internal_autosync = 0


-- 
Regards,
Peng

Richard W.M. Jones

2014-May-12 20:11 UTC

head link

Re: [Libguestfs] How to expand a partition (along with the filesystem on it) on a device?

On Sun, May 11, 2014 at 09:40:34PM -0500, Peng Yu wrote:> Hi,
> 
> I want to expand /dev/sda5 so that it takes the remaining space in
> /dev/sda. But virt-resize does not work. Does anybody know how to make
> it work? Thanks.
Indeed, virt-resize ignores logical MBR partitions, and as you
discovered it gives an error if you try to use logical partition names
on the command line:

http://libguestfs.org/virt-resize.1.html#logical-partitions

(There is also a BZ open about this, but I can't find it right now)

So it's a bit tricky.  All I can suggest (assuming you don't want to
submit patches to fix virt-resize) is this:  Use the default behaviour
of virt-resize -- creating a new partition (/dev/sda3) at the end of
the disk -- and then you can expand your root LV over to this extra
partition.

Something like this perhaps:

 # virt-resize saiph.qcow2 saiph_expand.qcow2    ## no other parameters

Inside the guest or using guestfish or virt-rescue:

 # vgextend mintaka-vg /dev/sda2 /dev/sda3
 # lvresize -L '100%FREE' /dev/mintaka-vg/root

Note there is currently no libguestfs binding for vgextend, but we
should add one and an RFE would be welcome.

HTH,

Rich.
> $ sudo virt-filesystems --long -h --all -a saiph.qcow2
> Name                 Type       VFS     Label MBR Size Parent
> /dev/sda1            filesystem ext2    -     -   243M -
> /dev/sda2            filesystem unknown -     -   1.0K -
> /dev/mintaka-vg/root filesystem ext4    -     -   7.8G -
> /dev/mintaka-vg/root lv         -       -     -   7.8G /dev/mintaka-vg
> /dev/mintaka-vg      vg         -       -     -   7.8G /dev/sda5
> /dev/sda5            pv         -       -     -   7.8G -
> /dev/sda1            partition  -       -     83  243M /dev/sda
> /dev/sda2            partition  -       -     05  1.0K /dev/sda
> /dev/sda5            partition  -       -     8e  7.8G /dev/sda
> /dev/sda             device     -       -     -   50G  -
> $ sudo virt-filesystems --long -h --all -a saiph_expand.qcow2
> Name                 Type       VFS     Label MBR Size Parent
> /dev/sda1            filesystem ext2    -     -   243M -
> /dev/sda2            filesystem unknown -     -   1.0K -
> /dev/mintaka-vg/root filesystem ext4    -     -   7.8G -
> /dev/mintaka-vg/root lv         -       -     -   7.8G /dev/mintaka-vg
> /dev/mintaka-vg      vg         -       -     -   7.8G /dev/sda5
> /dev/sda5            pv         -       -     -   7.8G -
> /dev/sda1            partition  -       -     83  243M /dev/sda
> /dev/sda2            partition  -       -     05  1.0K /dev/sda
> /dev/sda5            partition  -       -     8e  7.8G /dev/sda
> /dev/sda             device     -       -     -   50G  -
> 
> $ sudo virt-resize -d --expand /dev/sda5 saiph.qcow2 saiph_expand.qcow2
> command line: virt-resize -d --expand /dev/sda5 saiph.qcow2
saiph_expand.qcow2
> Examining saiph.qcow2 ...
> libguestfs: trace: add_drive "saiph.qcow2"
"readonly:true"
> libguestfs: trace: add_drive = 0
> libguestfs: trace: add_drive "saiph_expand.qcow2"
"readonly:false"
> libguestfs: trace: add_drive = 0
> libguestfs: trace: launch
> libguestfs: trace: get_tmpdir
> libguestfs: trace: get_tmpdir = "/tmp"
> libguestfs: trace: get_cachedir
> libguestfs: trace: get_cachedir = "/var/tmp"
> libguestfs: trace: launch = 0
> libguestfs: trace: lvm_set_filter "/dev/sda"
> libguestfs: trace: lvm_set_filter = 0
> libguestfs: trace: feature_available "ntfsprogs ntfs3g"
> libguestfs: trace: feature_available = 1
> libguestfs: trace: feature_available "btrfs"
> libguestfs: trace: feature_available = 1
> libguestfs: trace: blockdev_getss "/dev/sdb"
> libguestfs: trace: blockdev_getss = 512
> libguestfs: trace: blockdev_getsize64 "/dev/sda"
> libguestfs: trace: blockdev_getsize64 = 53687091200
> libguestfs: trace: blockdev_getsize64 "/dev/sdb"
> libguestfs: trace: blockdev_getsize64 = 53687091200
> libguestfs: trace: part_get_parttype "/dev/sda"
> libguestfs: trace: part_get_parttype = "msdos"
> saiph.qcow2 size 53687091200 bytes
> saiph_expand.qcow2 size 53687091200 bytes
> partition table type: msdos
> libguestfs: trace: pvs_full
> libguestfs: trace: pvs_full = <struct guestfs_lvm_pv_list *>
> libguestfs: trace: part_list "/dev/sda"
> libguestfs: trace: part_list = <struct guestfs_partition_list *>
> libguestfs: trace: part_get_bootable "/dev/sda" 1
> libguestfs: trace: part_get_bootable = 1
> libguestfs: trace: part_get_mbr_id "/dev/sda" 1
> libguestfs: trace: part_get_mbr_id = 131
> libguestfs: trace: vfs_type "/dev/sda1"
> libguestfs: trace: vfs_type = "ext2"
> libguestfs: trace: mount_ro "/dev/sda1" "/"
> libguestfs: trace: mount_ro = 0
> libguestfs: trace: statvfs "/"
> libguestfs: trace: statvfs = <struct guestfs_statvfs *>
> libguestfs: trace: part_get_bootable "/dev/sda" 2
> libguestfs: trace: part_get_bootable = 0
> libguestfs: trace: part_get_mbr_id "/dev/sda" 2
> libguestfs: trace: part_get_mbr_id = 5
> libguestfs: trace: lvs
> libguestfs: trace: lvs = ["/dev/mintaka-vg/root"]
> libguestfs: trace: vfs_type "/dev/mintaka-vg/root"
> libguestfs: trace: vfs_type = "ext4"
> libguestfs: trace: mount_ro "/dev/mintaka-vg/root" "/"
> libguestfs: trace: mount_ro = 0
> libguestfs: trace: statvfs "/"
> libguestfs: trace: statvfs = <struct guestfs_statvfs *>
> 2 partitions found
> /dev/sda1:
>     partition data: 1 1048576-255852543 (254803968 bytes)
>     bootable: true
>     partition ID: 0x83
>     content: filesystem ext2 (246755328 bytes)
> /dev/sda2:
>     partition data: 2 256900096-8588886015 (8331985920 bytes)
>     bootable: false
>     partition ID: 0x5
>     content: extended partition
> 1 logical volumes found
> /dev/mintaka-vg/root:
>     content: filesystem ext4 (8130584576 bytes)
> calculate surplus: outsize=53687091200 required=8586789888
> overhead=2326528 surplus=45097974784
> libguestfs: trace: canonical_device_name "/dev/sda5"
> libguestfs: trace: canonical_device_name = "/dev/sda5"
> surplus before --expand or --shrink: 45097974784
> virt-resize: error: /dev/sda5: partition not found in the source disk
> image (this error came from '--expand' option on the command line).
> Try running this command: virt-filesystems --partitions --long -a
> saiph.qcow2
> 
> If reporting bugs, run virt-resize with the '-d' option and include
the
> complete output.
> libguestfs: trace: close
> libguestfs: trace: internal_autosync
> libguestfs: trace: internal_autosync = 0
> 
> 
> -- 
> Regards,
> Peng
> 
> _______________________________________________
> Libguestfs mailing list
> Libguestfs@redhat.com
> https://www.redhat.com/mailman/listinfo/libguestfs
-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-builder quickly builds VMs from scratch
http://libguestfs.org/virt-builder.1.html

Libguestfs - May 2014 - How to expand a partition (along with the filesystem on it) on a device?

[Libguestfs] How to expand a partition (along with the filesystem on it) on a device?

Re: [Libguestfs] How to expand a partition (along with the filesystem on it) on a device?