[libvirt-users] libvirt 1.2.5 + xen 4.4

[Daniel P. Berrange]

On Thu, Sep 25, 2014 at 10:40:24AM +0530, cool dharma06 wrote:
> hi,
> 
> 
> i am trying to create hvm in xen via libvirt but i am facing some error. i
> installed the packages like bltap-utils, blktap-dkms in my dom0.
> 
> 
> virsh create tiny_core.xml
> p11-kit: invalid config filename, will be ignored in the future:
> /etc/pkcs11/modules/gnome-keyring-module
> error: Failed to create domain from tiny_core.xml
> error: internal error: libxenlight failed to create new domain 'tiny'
> 
> 
>  config.xml file:
> <domain type='xen'>
>   <name>tiny</name>
>   <uuid>cc5b436b-a04b-4fc3-b145-e91df494fd26</uuid>
>   <memory unit='KiB'>262144</memory>
>   <currentMemory unit='KiB'>262144</currentMemory>
>   <vcpu placement='static'>1</vcpu>
>   <os>
>     <type arch='x86_64' machine='xenfv'>hvm</type>
>     <loader>/usr/local/lib/xen/boot/hvmloader</loader>
>     <boot dev='hd'/>
>   </os>
>  <pae/>
>  <acpi/>
>  <apic/>
>   <clock offset='variable' adjustment='0' basis='localtime'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>restart</on_crash>
>   <devices>
>     <emulator>/usr/local/lib/xen/bin/qemu-dm</emulator>
>     <disk type='file' device='disk'>
>       <driver name='file'/>
>       <source file='/opt/tinyos/tiny_core_plus.img'/>
>       <target dev='hda'/>
>     </disk>

[snip]

> libxl: debug: libxl_device.c:251:libxl__device_disk_set_backend: Disk
> vdev=hda spec.backend=tap
> libxl: debug: libxl_device.c:210:disk_try_backend: Disk vdev=hda, backend
> tap unsuitable because blktap not available

You seem to have built yourself a Xen build without the blktap disk
driver backend, which is making Xen unhappy.

Regards,
Daniel
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