On 07/03/2013 09:46 AM, Daniel P. Berrange wrote:
> On Wed, Jul 03, 2013 at 09:44:46AM -0400, Chris Evich wrote:
>> Hi,
>>
>> On Fedora 18 (libvirt 0.10.2.6-1) I'm trying to add a new serial device
>> to a KVM VM with:
>>
>> virsh attach-device foobar /tmp/serial.xml
>>
>> and I keep getting:
>>
>> error: Failed to attach device from /tmp/serial.xml
>> error: XML error: unknown device type
>>
>> with serial.xml:
>>
>> <serial type='file'>
>> <source path='/tmp/serialfile'/>
>> <target port='1'/>
>> </serial>
>>
>> Though I tried it w/o the <target> tag, with and without the --config
>> flag, and with and without the guest running. Assuming it's similar, I
>> tried and was successful in adding this device via virt-manager, though
>> it complains if the VM is running (which is fine).
>>
>> What am I doing wrong with the virsh attach-device command or XML?
>
> There is no support for hotplug of any character device (that
> covers serial, parallel, console, channnel elements in the XML)
>
>
> Daniel
>
Oops, sorry, should have been more clear than "and with and without the
guest running".
* I see the 'unknown device type' error when guest is running and I run
"virsh attach-device foobar /tmp/serial.xml --config".
* I also get 'unknown device type' error when guest is NOT running, and
I run "virsh attach...." both with or without '--config' flag.
* I see the 'unknown device type' error inside the "details" window
when the guest is running and I use virt-manager.
* I do NOT get any error, and the device is attached, when I use
virt-manager, and the guest is NOT running (or by clicking yes
after getting error in above bullet).
The main difference in using virt-manager, is that I'm selecting the
file type and entering in the values manually instead of in an XML file.
A loosely-related problem is with serial-hot plug (which is expected to
not work). The error message reported under details is the same/similar
'device type error'. Whereas I was expecting something more specific
like a "Can't hotplug this" error (see screenshot).
Either way, the main thing I'm concerned about is the "cold-plug" +
device-type error. Here's what I'm doing:
[root@cevich ~]# virsh list --all
Id Name State
----------------------------------------------------
6 foobar running
[root@cevich ~]# virsh attach-device foobar /tmp/serial.xml
error: Failed to attach device from /tmp/serial.xml
error: XML error: unknown device type
[root@cevich ~]# virsh shutdown foobar
Domain foobar is being shutdown
[root@cevich ~]# virsh list --all
Id Name State
----------------------------------------------------
- foobar shut off
[root@cevich ~]# virsh attach-device foobar /tmp/serial.xml --config
error: Failed to attach device from /tmp/serial.xml
error: XML error: unknown device type
[root@cevich ~]# virsh start foobar
<see screenshot>
Then...
[root@cevich ~]# virsh shutdown foobar
Domain foobar is being shutdown
[root@cevich ~]# virsh list --all
Id Name State
----------------------------------------------------
- foobar shut off
[root@cevich ~]# virsh dumpxml foobar | grep -A2 "serial type='file'"
<serial type='file'>
<source path='/tmp/serialfile'/>
<target port='1'/>
--
Chris Evich, RHCA, RHCE, RHCDS, RHCSS
Quality Assurance Engineer
e-mail: cevich + `@' + redhat.com o: 1-888-RED-HAT1 x44214
Attachment:
Screenshot from 2013-07-03 14:20:38.png
Description: PNG image
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