Extend Linux hard disk

[Arcanes06]

Hi all,

I'm working on PVE 5.1 and i get some issues when i want to extend a linux virtual machine hard disk.
I'm working with LVM on the proxmox node.
For example I extend by 10G a scsi drive on a VM.

I see the change on the sda disk when i run
# dmesg
But i can't extend the root partition of the VM by using parted, pvextend, pvresize, fdisk or something else.

Is there a simple way to extend root partition after adding some disk space on a VM?

Thank you in advance

 

[Mihai]

If the VM installation also has an lvm, you have to do this within the VM as well:

• Extend LVM
• Extend Partition

 

[Arcanes06]

Yes the vm has. But it doesn't work for me.
Can you please tell me the procedure after adding some disk space?

 

[Mihai]

Boot the VM with a Live CD like Ubuntu-Live CD.

Extend LVM with a GUI:

1. sudo add-apt-repository universe
2. sudo apt-get install system-config-lvm
3. system-config-lvm

Extend the LVM with that GUI. If you cannot change the lvm you may have to do this: sudo vgchange -ay.

Once the LVM is extended, use Gparted (also GUI) to extend the partition.

 

[mbaldini]

Using fdisk (or cfdisk or gdisk if it's gpt) /dev/sdX from inside the VM, can you see the free space at the end of the disk?
In that case you can:
- partition that space
- pvcreate /dev/sdXn on the new partition
- then vgextend vg /dev/sdXn (vg is the name of the volume group you want to extend)
- in the end lvresize -r -l +100%FREE vg

It should work

 

[elmacus]

Or follow wiki:
https://pve.proxmox.com/wiki/Resize_disks