VMWare/Resize LVM disk after extending Virtual Machine disk (vmdk)

 

Follow these simple steps to resize a Virtual machine disk (vmdk) and then extend the volume using LVM. Make sure that you have/make a backup before carrying out these steps. First go ahead and extend the vmdk from ESXi/vCenter. I increased the disk size from 20GB-->>30GB.

Before

File:Vmdk resize 8.png

After

File:Vmdk resize 9.png

Then Go ahead and run these commands to extend the LVM volume on Linux host.

First check the existing partitions

lsblk

File:Vmdk resize 1.png

Note: If new size is not visible, Run a re-scan of iscsi bus

ls /sys/class/scsi_disk/

File:Vmdk resize 2.png

echo "1" > /sys/class/scsi_disk/2:0:2:0/device/rescan

File:Vmdk resize 3.png

Note: as it’s the 2nd disk = sdb, scan the 2nd entry

Now resize the physical volume

pvresize /dev/sdb

File:Vmdk resize 4.png

Check the FREE PE (Physical Extents)

pvdisplay

File:Vmdk resize 5.png

Take a note of the PE and use it to extend the partition. I want to extend the var_lv as displayed below.

df -h | grep var

File:Vmdk resize 6.png

Now extend

lvextend -l +2560 /dev/mapper/VolGroup01-var_lv

(OR)

lvextend -L+1GB /dev/mapper/VolGroup01-var_lv (For specific size extension)

And then resize the partition (using FRE PE).

resize2fs /dev/mapper/VolGroup01-var_lv

And that’s it you should up and running with the extra space with no downtime required or data loss as its LVM.

File:Vmdk resize 7.png