On Mon, Sep 21, 2015 at 08:16:17 +0000, Jean-Pierre Ribeauville wrote:
> Hi,
> On a KVM host installed with following packages versions :
>
> [root@rhel6-roadster test_channels_OK]# rpm -qa | grep libvirt
> libvirt-devel-0.10.2-29.el6.x86_64
> libvirt-0.10.2-29.el6.x86_64
> libvirt-client-0.10.2-29.el6.x86_64
> libvirt-java-0.4.9-1.el6.noarch
> libvirt-java-devel-0.4.9-1.el6.noarch
> libvirt-python-0.10.2-29.el6.x86_64
> [root@rhel6-roadster test_channels_OK]# rpm -qa | grep qemu
> qemu-kvm-0.12.1.2-2.415.el6.x86_64
> gpxe-roms-qemu-0.9.7-6.10.el6.noarch
> qemu-img-0.12.1.2-2.415.el6.x86_64
> [root@rhel6-roadster test_channels_OK]# virsh --version
> 0.10.2
> [root@rhel6-roadster test_channels_OK]#
>
>
> When trying to add a channel device via virsh attach-device , I got following errors :
>
> <channel type='unix'>
> <source mode='bind' path='//var/lib/libvirt/qemu/omnivision_123456.agent'/>
> <target type='virtio' name='omnivision_123456.agent' state='disconnected'/>
> <alias name='channel_OmniVision'/>
> <address type='virtio-serial' controller='0' bus='0' port='30'/>
> </channel>
>
>
> Guest is off :
>
>
> [root@rhel6-roadster test_channels_OK]# virsh attach-device Linux_2 add_channel_device.xml
> error: Failed to attach device from add_channel_device.xml
> error: Requested operation is not valid: cannot do live update a device on inactive domain
This was a bug in older versions. In case when the VM is offline you'll
need to explicitly use the '--config' flag so that only the
configuration is updated.
> [root@rhel6-roadster test_channels_OK]#
>
>
> Guest is running :
>
> [root@rhel6-roadster test_channels_OK]# virsh attach-device Linux_2 add_channel_device.xml
> error: Failed to update device from add_channel_device.xml
> error: XML error: unknown device type
The libvirt version you are using does not support character device
hotplug, so you'll not be able to hotplug a channel at this point.
You'll need to use at least libvirt-1.1.1 or a version that backported
commit:
commit 24b0821926ead364a625210940773d7da43f1577
Author: Michal Privoznik <mprivozn@xxxxxxxxxx>
Date: Wed Mar 13 11:08:55 2013 +0100
qemu: Implement chardev hotplug on live level
Since previous patches has prepared everything for us, we
may now implement live hotplug of a character device.
and the preliminary fixes.
Peter
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