howto resize a lvm volume group

[KisteBecks]

hi,


ive setup a partition over my 80gb drive which includes a lvm volume group called vgpool but i forgot to create a boot partition outside of the lvm.
theres still space on the drive, but how do i get the volume group smaller?

inside the lvm are various logical volumes called: usr/var/home/tmp and so on.

i know that the space allocated for the volume group is bigger than all logical volumes combined.


so what i need is to shrink the volume group and after that the surrounding partition to get a small boot partition at the end of the lvm (outside of it)

a few hours ago i thought


pvresize vgpool --setphysicalvolumesize 65
was the right command, but now im not so sure.
basically im missing vgresize - that would make the most sense.

and idea how to proceed?


the guy here used a hex editor on the partition table:
http://www.linuxquestions.org/questions/fedora-35/how-do-i-resize-lvm-volume-group-375877/
theres also this software from 2006:
http://evms.sourceforge.net

some infos:


sudo vgdisplay
--- Volume group ---
VG Name vgpool
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 14
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 7
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 70.00 GiB
PE Size 4.00 MiB
Total PE 17919
Alloc PE / Size 16665 / 65.10 GiB
Free PE / Size 1254 / 4.90 GiB
VG UUID dLmEog-WIVq-e7oI-mTNq-QccA-Ds0L-z34jqq





sudo vgdisplay
--- Volume group ---
VG Name vgpool
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 14
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 7
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 70.00 GiB
PE Size 4.00 MiB
Total PE 17919
Alloc PE / Size 16665 / 65.10 GiB
Free PE / Size 1254 / 4.90 GiB
VG UUID dLmEog-WIVq-e7oI-mTNq-QccA-Ds0L-z34jqq

julius_new@ws-wf:~$ sudo lvdisplay
--- Logical volume ---
LV Name /dev/vgpool/home
VG Name vgpool
LV UUID MmAyXO-U450-dPaM-E38k-jbRQ-8LPC-imdgIp
LV Write Access read/write
LV Status available
# open 0
LV Size 40.00 GiB
Current LE 10240
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 252:0

--- Logical volume ---
LV Name /dev/vgpool/boot
VG Name vgpool
LV UUID Y0YGA2-gydb-wQg1-q1IK-0xMm-QcAp-dCaE41
LV Write Access read/write
LV Status available
# open 0
LV Size 100.00 MiB
Current LE 25
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 252:1

--- Logical volume ---
LV Name /dev/vgpool/swap
VG Name vgpool
LV UUID 3mcmYK-3EEM-i2Y5-5Ulh-Ht14-pRyC-nKZDqH
LV Write Access read/write
LV Status available
# open 0
LV Size 4.00 GiB
Current LE 1024
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 252:2

--- Logical volume ---
LV Name /dev/vgpool/usr
VG Name vgpool
LV UUID lZWNol-JJfP-RMTX-9eMT-4fVm-JKzY-bVY0eB
LV Write Access read/write
LV Status available
# open 0
LV Size 6.00 GiB
Current LE 1536
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 252:3

--- Logical volume ---
LV Name /dev/vgpool/var
VG Name vgpool
LV UUID oMz8iq-9rPS-HOAt-DTHG-6K3O-8Nxw-w8NEtj
LV Write Access read/write
LV Status available
# open 0
LV Size 5.00 GiB
Current LE 1280
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 252:4

--- Logical volume ---
LV Name /dev/vgpool/root
VG Name vgpool
LV UUID peqn1h-826s-wEKz-ggXg-VoMu-GT03-bDzXPJ
LV Write Access read/write
LV Status available
# open 0
LV Size 5.00 GiB
Current LE 1280
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 252:5

--- Logical volume ---
LV Name /dev/vgpool/tmp
VG Name vgpool
LV UUID NATAGo-9sfG-0WMR-jgUi-1I5C-b7ow-0yDpf3
LV Write Access read/write
LV Status available
# open 0
LV Size 5.00 GiB
Current LE 1280
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:6

[darkod]

Did you try running it like this first? The recent versions of ubuntu don't require the /boot partition outside the LVM like earlier.

Some LVM basics:
http://www.howtogeek.com/howto/40702/how-to-manage-and-use-lvm-logical-volume-management-in-ubuntu/

It has some reduce info among them. Just make sure you reduce the filesystem first, if you decide to do that.

[KisteBecks]

yeah, i did but not before posting....sry.