Linux Virtualization Adding Storage to Guests

External

• https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/sect-Storage_Volumes-Adding_storage_devices_to_guests.html

Internal

• Linux Virtualization Operations
• Guest Operations

Add a Storage Volume as Block Device to Guest

Provision the Storage Volume

Create the storage volume with:

   virsh vol-create-as --pool <pool-name> --name <volume-name> --capacity <capacity> --format <fomat>

Shut Down the Guest

   virsh shutdown <guest-name>

Note that is also possible to add the device while the guest is running, see virsh man page for more details.

Configure the Guest to Mount the Storage Volume at Boot

Use virsh attach-disk as shown in the example, by specifying the file-based storage volume path, as shown by the virsh vol-list command, and the device name under which the disk is exposed to guest, typically "vdX", where X is "a", "b", etc:

Attaching a File-Based Storage Volume with virsh attach-disk

Start the Guest

   virsh start <guest-name>

Upon startup, the new disk should be available as /dev/vdX.

lsblk

Partition the New Disk

Partition the new disk with

   fdisk /dev/vdX

More details about fdisk are available here:

fdisk

Build a File System

Create Filesystems

Mount at Boot

/etc/fstab