libvirt users - Jul 2011 - insert ISO into a KVM guest

There's got to be a simple way to attach an ISO to a KVM guest. I just
haven't yet discovered it.

I've tried adding the following stanza to my guest XML file, under the
<devices> stanza and starting the guest:

<disk type='file' device='cdrom'>
   <driver name='qemu' type='raw' />
   <source file='/etc/libvirt/qemu/isos/kvm1.iso' />
   <target dev='hda' bus='ide' />
   <readonly />
</disk>


But I get the following:

error: Failed to start domain rhel6guest
error: internal error process exited while connecting to monitor: char device
redirected to /dev/pts/3
qemu: could not open disk image /etc/libvirt/qemu/isos/kvm1.iso: Permission
denied


A perms issue should be easy to address one would think, but I've tried
every possible combination of perms changes including 777. Changed ownership
from root to qemu:qemu (though I'm running as root). I'm not running
SELinux.

Anyone have any insights on how to mount a simple ISO into a KVM guest?  Both at
build time AND while the guest is running?

Thanks

Jeff

On 07/26/2011 08:07 AM, Jeff wrote:
> There's got to be a simple way to attach an ISO to a KVM guest. I just
haven't yet discovered it.
>
> I've tried adding the following stanza to my guest XML file, under the
<devices> stanza and starting the guest:
>
> <disk type='file' device='cdrom'>
>    <driver name='qemu' type='raw' />
>    <source file='/etc/libvirt/qemu/isos/kvm1.iso' />
>    <target dev='hda' bus='ide' />
>    <readonly />
> </disk>
>
>
> But I get the following:
>
> error: Failed to start domain rhel6guest
> error: internal error process exited while connecting to monitor: char
device redirected to /dev/pts/3
> qemu: could not open disk image /etc/libvirt/qemu/isos/kvm1.iso: Permission
denied
>
What about the parent directory perms?
> A perms issue should be easy to address one would think, but I've tried
every possible combination of perms changes including 777. Changed ownership
from root to qemu:qemu (though I'm running as root). I'm not running
SELinux.
>
> Anyone have any insights on how to mount a simple ISO into a KVM guest? 
Both at build time AND while the guest is running?
>
Use the loop device on the guest itself?  IE: mount -o loop filename.iso /mnt


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