# virsh -c qemu:///system edit VMname
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/var/lib/libvirt/images/vmname_var.qcow2'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
You will have to adjust the values of course.
Why not try doing this with virt-manager? When I started using KVM (after moving from ESXi) I had trouble with all the commands and finding everything I needed, but virt-manager works great.
- Trey
On Tue, Jul 26, 2011 at 4:26 AM, thomas veymont <thomas.veymont@xxxxxxxxx> wrote:
anyone may help on that topic ?
thanks
2011/7/20 thomas veymont <thomas.veymont@xxxxxxxxx>:
> hi there,
>
> I'm following these documentations to add a file-based disk volume to
> a KVM guest under Centos 6.0 :
> http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/chap-Virtualization-Storage_Volumes.html
>
> as instructed, I created a "pool" then a "volume", file-based, e.g :
>
> mkdir /mnt/raid/kvm_pool1
> virsh # pool-define-as pool1 dir - - - - "/mnt/raid/kvm_pool1"
> virsh # pool-autostart pool1
> virsh # vol-create-as pool1 volume1 20G --allocation 15G --format qcow2
>
> now I want to associate "volume1" to my guest OS. Following this doc:
>
> http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/sect-Virtualization-Virtualized_block_devices-Adding_storage_devices_to_guests.html
>
> - why does this ask me to create a file with "dd" ? it's already been
> created before with the virsh pool commands, isn't it? Seems to
> me I'm bypassing the libvirt/virsh layer if I do that.
>
> - after that, the doc tells me to do some stuff with guest XML files.
> Is'nt there some specific commands provided by
> virsh to associate a managed Pool to a managed Guest ?
>
> - in this case, should I use the virsh "attach-disk" command ?
>
> thanks.
> --
> Tom
>
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