hi:
I want attach a physical disk to a qemu instance in devstack environment,But
these methods have some problem.
Method 1:
step1
reference
http://ronaldevers.nl/2012/10/14/adding-a-physical-disk-kvm-libvirt.html
virsh edit instance-00000001
you add the disk to the domain??s xml config file by hand. So open up
/etc/libvirt/qemu/<your-vm>.xml in your favourite editor and add a <disk>
section to the <devices> section:
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source dev='/dev/md/storage'/>
<target dev='vdb' bus='virtio'/>
</disk>
This will make the host??s /dev/md/storage available in the guest as
/dev/vdb
step2
guest os can not find the new physical disk. Then reboot guest os, the xml
is reverted to before,and guest os can not find the new phyisical disk.
Method 2:
step 1
[root@opentest ~]# virsh attach-disk instance-00000001 /dev/md/storage vdb
--cache none --config --type disk
Disk attached successfully
step 2
guest os can not find the new physical disk. Then reboot guest os, the xml
is reverted to before,and guest os can not find the new phyisical disk.__________________________________________________________________________
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