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How to reduce physical volume on remote Virtual Machine?

I'd like to reduce the disk size of a remote VM as I've removed 83G logical volume that was not required. All that I've seen on this indicates the use of LiveCD, I have no physical access and can access VM console via host.

Anyone suggest a low risk method?

pvs:
PV VG Fmt Attr PSize PFree
/dev/vda2 vg_rm01 lvm2 a-- 149.51g 83.77g

vgs:
VG #PV #LV #SN Attr VSize VFree
vg_rm01 1 2 0 wz--n- 149.51g 83.77g

lvs:
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
lv_root vg_rm01 -wi-ao--- 50.00g
lv_swap vg_rm01 -wi-a---- 15.74g

Uni Kitty

Is this VMware? One way you could do this is V2V using converter. I used to use this method for lots of reasons and one can be to resize the disk, and since you mention that you do not have "access" to the VM, you can run converter on the running guest.

Check out Andy's article and let us know if you have questions.
https://www.experts-exchange.com/Software/Virtualization/A_17461-HOW-TO-Convert-a-physical-server-or-virtual-server-P2V-V2V-to-Microsoft-Hyper-V-using-Microsoft-Virtual-Machine-Converter-3-1.html?related=28614578

Joseph Gan

Can you show the following outputs:

# lvscan
# vgscan
# pvscan

gheist

You cannot change PV size after LVM has its hands at it.

gelonida

Is it VMware, VirtualBox or another solution?

mickt

ASKER

It is kvm.

Can resize image with qemu-img resize and was hoping I could easily resize PV &VG in lvm.

Could I shutdown VM and attach disk to another VM and reduce then?

mickt

ASKER

In response to request form ganjos:

lvscan
ACTIVE '/dev/vg_rm01/lv_root' [50.00 GiB] inherit
ACTIVE '/dev/vg_rm01/lv_swap' [15.74 GiB] inherit

vgscan
Reading all physical volumes. This may take a while...
Found volume group "vg_rm01" using metadata type lvm2

pvscan
PV /dev/vda2 VG vg_rm01 lvm2 [149.51 GiB / 83.77 GiB free]
Total: 1 [149.51 GiB] / in use: 1 [149.51 GiB] / in no VG: 0 [0 ]

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mickt

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gheist

You cannot resize LVM2 MBR partition. You must add extra LVM2 MBR partition and then remove old one.

mickt

ASKER

Should be ok in my instance?

df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_rm01-lv_root
63G 7.9G 52G 14% /
tmpfs 16G 0 16G 0% /dev/shm
/dev/vda1 485M 37M 423M 9% /boot

mickt

ASKER

I should also have mentioned that cloud-utils-growpart RPM should be installed and linux-rootfs-resize installed. You can google the latter and may need to edit to include additional OSes as I did.

mickt

ASKER