[CentOS-virt] CentOS 6 Xen virt* issues

Sat Sep 26 20:29:29 UTC 2015
Pasi Kärkkäinen <pasik at iki.fi>

On Sat, Sep 26, 2015 at 09:04:23PM +0300, Pasi Kärkkäinen wrote:
> Hello,
> I just upgraded some of my el6xen boxes to latest CentOS 6.7, Xen 4.4.3 and dom0 3.18.17 rpms, and noticed these new problems:

And third issue aswell:

3) Creating an HVM guest using virt-manager with file-based storage uses loopback-mount, not blktap

When I manually create a new Xen HVM guest using virt-manager, and choose file-based image for storage of the VM, it seems to be set up to use file: backend/driver with loopback-mounted image file:

    <disk type='file' device='disk'>
      <driver name='file'/>
      <source file='/var/lib/libvirt/images/testvm2.img'/>
      <target dev='hda' bus='ide'/>

# losetup -a
/dev/loop0: [fd00]:1709109 (/var/lib/libvirt/images/testvm2.img)

With earlier versions of rpms similar setup used blktap2 backend.. (and yes, I do have blktap module loaded in dom0 kernel).


-- Pasi