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
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