[libvirt] Mounting a raw DVD
Adam Mooz
adam.mooz at gmail.com
Tue Nov 10 05:09:40 UTC 2009
On 2009-11-09, at 11:46 PM, Gerry Reno wrote:
> Adam Mooz wrote:
>> Hello List,
>>
>> I'm attempting to pass a DVD drive of a headless server into a
>> virtual machine. So far I've managed to mount *something* into the
>> VM, but it's being registered as a blank DVD within the VM. When I
>> mount /dev/dvd into the bare-metal machine it registers normally as
>> the DVD. How do I pass physical drives into a VM and back out
>> using libvirt?
>> Command used:
>> #virsh attach-disk Montreal /dev/dvd hdc --mode readonly --driver
>> phy --type cdrom
>> Connecting to uri: qemu:///system
>> Disk attached successfully
>>
>> VM XML file:
>>
>> <domain type='kvm'>
>> <name>Montreal</name>
>> <uuid>0f79ba7f-27bf-16a0-5887-6cfa2b5569f1</uuid>
>> <memory>2097152</memory>
>> <currentMemory>2097152</currentMemory>
>> <vcpu>1</vcpu>
>> <os>
>> <type arch='x86_64' machine='pc-0.11'>hvm</type>
>> <boot dev='hd'/>
>> </os>
>> <features>
>> <acpi/>
>> <apic/>
>> <pae/>
>> </features>
>> <clock offset='utc'/>
>> <on_poweroff>destroy</on_poweroff>
>> <on_reboot>restart</on_reboot>
>> <on_crash>restart</on_crash>
>> <devices>
>> <emulator>/usr/bin/kvm</emulator>
>> <disk type='file' device='cdrom'>
>> <target dev='hdc' bus='ide'/>
>> <readonly/>
>> </disk>
>> <disk type='file' device='disk'>
>> <source file='(Mangled Purposely)'/>
>> <target dev='vda' bus='virtio'/>
>> </disk>
>> <interface type='bridge'>
>> <mac address='(mangled purposly)/> <source bridge='br0'/>
>> <model type='virtio'/>
>> </interface>
>> <serial type='pty'>
>> <target port='0'/>
>> </serial>
>> <console type='pty'>
>> <target port='0'/>
>> </console>
>> <input type='mouse' bus='ps2'/>
>> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/>
>> <video>
>> <model type='cirrus' vram='9216' heads='1'/>
>> </video>
>> </devices>
>> </domain>
>>
>
> I haven't done this for a while but I believe you have to issue a
> 'detach' command afterwards.
>
> -Gerry
>
> --
> Libvir-list mailing list
> Libvir-list at redhat.com
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# virsh detach-disk Montreal hdc
Connecting to uri: qemu:///system
error: this function is not supported by the hypervisor: only SCSI or
virtio disk device can be detached dynamically
? Also, I'm not sure if you understood my question. When I pass in
the DVD device into the VM it registers as a blank DVD. if I pass in
a non-existant folder it blows up, so I know it's reading something
from the real DVD drive. Mounting the real DVD drive in the bare-
metal machine shows the files on the drive, but I cannot get them to
appear in the VM. How do I get the same files to show up in the VM
(i.e. mount the DVD drive into the VM)?
-----------------------------------------------------------------
Adam Mooz
Adam.Mooz at gmail.com
AdamMooz at me.com
http://www.AdamMooz.com
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