[libvirt-users] ISO refuses to let vm starts (and is not mentioned in config)

[Mauricio Tavares]

On Thu, Mar 6, 2014 at 7:59 AM, Mauricio Tavares <raubvogel at gmail.com> wrote:
> On Thu, Mar 6, 2014 at 12:16 AM, Mauricio Tavares <raubvogel at gmail.com> wrote:
>>       Trying to start one of my vms, a centos one at that, but am
>> getting the following message:
>>
>> [root at vmhost ~]# virsh start voip --paused
>> error: Failed to start domain voip
>> error: cannot open file
>> '/var/tmp/FreePBX-5.211.65-3-x86_64-Full-1388073872.iso': No such file
>> or directory
>>
>> [root at vmhost ~]#
>>
>> But, virsh dumpxml voip shows no info onto the .iso
>>
>>     <disk type='file' device='disk'>
>>       <driver name='qemu' type='raw' cache='none' io='native'/>
>>       <source file='/dev/vmhost_vg0/voip'/>
>>       <target dev='vda' bus='virtio'/>
>>       <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
>> function='0x0'/>
>>     </disk>
>>     <disk type='file' device='cdrom'>
>>       <driver name='qemu' type='raw'/>
>>       <target dev='hda' bus='ide'/>
>>       <readonly/>
>>       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>>     </disk>
>>     <disk type='file' device='cdrom'>
>>       <driver name='qemu' type='raw'/>
>>       <target dev='hdb' bus='ide'/>
>>       <readonly/>
>>       <address type='drive' controller='0' bus='0' target='0' unit='1'/>
>>     </disk>
>>
>> Log file is not particularly helpful:
>>
>> 2014-03-04 22:57:46.121+0000: shutting down
>> 2014-03-05 23:42:18.528+0000: shutting down
>> 2014-03-05 23:47:07.375+0000: shutting down
>> 2014-03-06 00:56:32.908+0000: shutting down
>> 2014-03-06 01:11:32.582+0000: shutting down
>>
>> So, the question is how did this iso got involved in this specific vm?
>> I can start my other vms without them even knowing about this .iso.
>
>       This might not be relevant but many moons ago when I would
> create a vm in this host, I would put the OS install iso in /var/tmp.
> I did create a freebsd vm there before, but since I built a second vm
> host (esxi), I moved my testing vms there and kept the production ones
> in the qemu-based one. The point of this long and irrelevant sappy
> story is that it seems libvirt remembers that I used that iso before,
> kinda like what virtualbox does. I know how to make virtuabox forget
> about an iso/disk or find which vm is using that, but not on libvirt.

      I *fixed* (not solved because I do not know what caused that)
the problem by

virsh undefine  --managed-save voip

and then recreating the vm. Which was not as bad as it sounds because
it just meant defining it, telling it to use the old MAC address for
the network interface, and making it see the disk.

Still I would like to have known what happened...