Red Hat Enterprise Linux Server Cookbook

Adding disks on the fly

This recipe includes instructions on how to create different types of storage volumes. Storage volumes are dedicated storage sets aside for use by guests.

Getting ready

There is not a lot of preparation to be done in order to add disks to your guest, which is in contrast to adding CPUs and RAM.

You only need to ensure that the storage pool has enough free disk space to accommodate the new disk.

How to do it…

Similar to the recipe for creating guests, you'll need to create a disk first. This can be done as follows:

1. Let's create a raw disk in the localfs-vm pool that is 30 GB big through the following command:

   ~]# virsh vol-create-as --pool localfs-vm --name rhel7_guest-vdb.raw --format raw --capacity 30G
   

2. Look up the path of the ...