[SOLVED] Unable to resize disk size inside the VM (using LVM)

M

meepmeep

Renowned Member
Apr 14, 2013
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8
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Hi

I try to extend one of my VM (debian 8.5) disk size, but it fails every time.

Steps :
  • In proxmox hypervisor, select "resize disk", add 10Gb
  • Start and stop VM, parted shows the free space on the physical drive with "print free" (free space at the end)
Code: 
(parted) print free
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 19.3GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start    End      Size     Type      File system  Flags
        0.03MB   1.05MB   1.02MB             Free Space
1      1.05MB   256MB    255MB    primary   ext2         boot
        256MB    257MB    1.05MB             Free Space
2      257MB    10736MB  10479MB  extended
5      257MB    10736MB  10479MB  logical                lvm
        10736MB  19327MB  8591MB             Free Space
  • Resizepart of the extended and logical partition to the end size :
Code: 
resizepart 2 19327
resizepart 5 19327
  • Partitions after :
Code: 
Number  Start    End      Size     Type      File system  Flags
        0.03MB   1.05MB   1.02MB             Free Space
1      1.05MB   256MB    255MB    primary   ext2         boot
        256MB    257MB    1.05MB             Free Space
2      257MB    19327MB  19070MB  extended
5      257MB    19327MB  19070MB  logical                lvm
        19327MB  19327MB  0.35MB             Free Space
  • pvresize the physical volume
Before :
Code: 
  PV Size               9.76 GiB / not usable 2.00 MiB

Code: 
 $pvresize  --setphysicalvolumesize 19327M /dev/vda5
  WARNING: /dev/vda5: Overriding real size. You could lose data.
  Physical volume "/dev/vda5" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized

After
Code: 
  PV Size               18.62 GiB / not usable 0
and
Code: 
  VG Size               18.62 GiB
  • lvextend the logical volume
Code: 
lvextend -l+100%FREE /dev/yolo-vg/root

... and it fails :

Code: 
  Size of logical volume yolo-vg/root changed from 9.31 GiB (2383 extents) to 18.17 GiB (4652 extents).
  device-mapper: resume ioctl on  failed: Invalid argument
  Unable to resume yolo--vg-root (253:0)
  Problem reactivating root

VM is broken, unable to get a shell, I use a snapshot to revert to previous state :/

So, were am I wrong ?
 
Hi,

you forgot to resize the partition before you resize the pv.
 
Hi,

How could I resize the partition before the "physical" volume ?? (my logic : Physical -> Volume -> Logical -> Partition)
 
Don't use --setphysicalvolumesize when growing, it did tell you you could lose data. If you don't pass a size to it it'll figure out the correct size on its own, which is good especially if eg. your partitioning tool doesn't cause a reload of the table or uses different factors (1000 vs 1024). If it doesn't pick up the size on its own properly try running partprobe (or reboot...).
 
Ok, thank you !

Solution :

Code: 
pvresize /dev/vda5
lvextend -l+100%FREE /dev/yolo-vg/root
resize2fs /dev/yolo-vg/root
 
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