Extending VM disk size

Here is how to extend VM disk size with virsh which is using qcow2 format.

• Shutdown your VM.

• Get the disk path:

virsh domblklist $VM_NAME

In my case it’s DISK_PATH=/mnt/sdb/vm-disk-07.qcow2.

• Increase disk size:

qemu-img resize $DISK_PATH +150G

• Start the VM;
• Login to the VM;
• Grow the VM disk size (if it’s not already automatically):

# for my configuration
growpart /dev/vda 1
resize2fs /dev/vda1