Expanding VM Disk Size

[eseanq]

Apologies if this is in the wrong section..


I made a Ubuntu Server VM that originally had a disk size of 10GB. I need to increase this so shut down the VM, then went to to Storage/Pools, and then edited the Zvol to increase the size from 10GB to 50GB.

Was following along the instructions from here:
Ubuntu: Extend your default LVM space

Upon restarting the VM I still wasn't seeing the increased size

cfsidk originally did show free space, so I resized /dev/sda3 to take up that space

pvresize fails with:

Code:

/etc/lvm/archive: mkdir failed: No space left on device
0 physical volume(s) resized or updated / 1 physical volume(s) not resized

And pvdisplay still shows /sda3 being ~7.7GB

What am I missing?

 

[vidx]

This is a couple of months late but I was in the same situation with a Ubuntu VM getting a low disk space notice and this is what I did to expand, without shutting it down.

First go to the TrueNAS GUI->Storage and find the Zvol. Use the 3 dots to Edit Zvol and key in a larger size for it. Save

Next SSH to Ubuntu VM/VNC to open the terminal

These are the commands needed to for the system to expand the disk size.

Code:

sudo fdisk /dev/sda

use

Code:

p

to list the partitions. Make note of the start cylinder of /dev/sda3 (using sda3 in this example. Change to whichever suits your usecase)

use

Code:

d 

to delete the partition (default is 3 for me, might be different for you)

use

Code:

n

to create a new partition (default is 3 for me, might be different for you) and agree with default end cylinder size which is the expanded size

use

Code:

w

to write the new partition table to disk. Fingers crossed

Code:

sudo reboot

and you will have a filesystem inside a larger partition

Code:

sudo resize2fs /dev/sda3

(/dev/sda3 was my default, change according to your needs) to make use of all available space on the partition.
Use

Code:

df -h

to check that the space has increased.

Extend the size of the VM

Code:

sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv

Finally

Code:

sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv

to make use of the newly added space

Hope this is useful