Add scsi controller option and wwn to virtual disks

We've added the facility to define a disk bus type of scsi to the
specification of a disk in the domain definition.  If the disk is
a scsi disk, a random wwn is generated unless a wwn is provided for
that disk.

The disk stanza now looks as follows:

   disk {
     volume_id = "${libvirt_volume.mydisk.id}"
     scsi = "yes"
     wwn = "05abcd123456789a"
   }

Having "scsi" present with any value will specify a scsi bus for
the disk.  If "wwn" is present for a scsci disk then the value of
"wwn" is used for the disk wwn, otherwise a random value is generated.

1 files changed, 5 insertions, 0 deletions

diff --git a/docs/providers/libvirt/r/domain.html.markdown b/docs/providers/libvirt/r/domain.html.markdown
index 99948e39..af3d7247 100644
--- a/docs/providers/libvirt/r/domain.html.markdown
+++ b/docs/providers/libvirt/r/domain.html.markdown
@@ -109,6 +109,10 @@ nvram = [
 The `disk` block supports:
 
 * `volume_id` - (Required) The volume id to use for this disk.
+* `scsi` - (Optional) Use a scsi controller for this disk.  The controller
+model is set to `virtio-scsi`
+* `wwn` - (Optional) Specify a WWN to use for the disk if the disk is using
+a scsi controller, if not specified then a random wwn is generated for the disk
 
 If you have a volume with a template image, create a second volume using the image as the backing volume, and then use the new volume as the volume for the disk. This way the image will not be modified.
 
@@ -127,6 +131,7 @@ resource "libvirt_domain" "domain1" {
   name = "domain1"
   disk {
     volume_id = "${libvirt_volume.mydisk.id}"
+    scsi = "yes"
   }
 
   network_interface {