[Kimchi-devel] [RFC] create a vm on a lun directly

[Sheldon]

Now we have support iSCSI or SCSI pool.
But we do not make use of the iSCSI or SCSI pool at present.

Here we want to create volumes for VM in those pools.
The best way to do it is on template level - and not on vm level

For if we create a template just assign a iSCSI or SCSI pool, the user 
still need to choose
a volume for his VM.

in the edit template page, we list the storage pool and the volume
like:
dir-pool-1
nfs-pool-2
iscsi-pool-1/lun-1
iscsi-pool-1/lun-2
iscsi-pool-1/lun-3
scsi-pool-1/lun-1
scsi-pool-1/lun-2

when selecting the storage pool with type iSCSI or SCSI the user also 
select the volume.

The user can create a VM with this volume.

But we should let user know it is dangerous to avoid user mistake when 
he choose the volume.

1. Now we only use the volume to create the vm not support shareable volume.
use the same volume in multiples vms, a new install will overwrite the 
current content.
We can check the volume ref_cnt to avoid this.

2. even this lun is not used buy vm, maybe the Adam has added a lun to a 
VG or use it on other purpose
Should we check the lun is is used external kimchi?
If a lun is added to a VG, need to check it?
If adam format a lun and create a files system on, need to check it?
Or we just prompt the data on this volume will destroyed.


-- 
Thanks and best regards!

Sheldon Feng(冯少合)<shaohef at linux.vnet.ibm.com>
IBM Linux Technology Center