[libvirt] Mounting a raw DVD

[Gerry Reno]

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