[libvirt-users] libvirt shortcomings of virsh domxml-to-native and domxml-from-native

[Dave Allan]

On Thu, Jul 26, 2012 at 11:49:57AM +0200, Matthias Bolte wrote:
> 2012/7/25 张光鹏 <zhanggp at neusoft.com>
> 
> > **
> >  Hi,all.
> > we use libvirt to manage some host and vms on vmware
> > hypervisor.I have found the libvirt there are some shortcomings .
> > Such as virsh domxml-to-native and domxml-from-native
> > .I have reviewed the libvirt source --src/vmx/vmx.c, code as follows :
> >   libvirt0.9.13源码
> > xml 转化成vmx
> >  vmx转化成xml
> >   /* def:os.arch -> vmx:guestOS */
> >  if (def->os.arch == NULL || STRCASEEQ(def->os.arch, "i686")) {
> > virBufferAddLit(&buffer, "guestOS = \"other\"\n");
> > } else if (STRCASEEQ(def->os.arch, "x86_64")) {
> > virBufferAddLit(&buffer, "guestOS = \"other-64\"\n");
> > } else {
> > VMX_ERROR(VIR_ERR_INTERNAL_ERROR,
> > _("Expecting domain XML attribute 'arch' of entry 'os/type' "
> > "to be 'i686' or 'x86_64' but found '%s'"), def->os.arch);
> > goto cleanup;
> > }
> > /* vmx:guestOS -> def:os.arch */
> > if (virVMXGetConfigString(conf, "guestOS", &guestOS, true) < 0) {
> > goto cleanup;
> > }
> >  if (guestOS != NULL && virFileHasSuffix(guestOS, "-64")) {
> > def->os.arch = strdup("x86_64");
> > } else {
> > def->os.arch = strdup("i686");
> > }
> >  if (def->os.arch == NULL) {
> > virReportOOMError();
> > goto cleanup;
> > }
> >
> > Vmware support many guestOS types like "windows7srv-64
> > ",If I use 64-bit Windows virtual machine, other-64 this type is not correct.
> > NIC e1000 system can not be used .
> > So
> > I suggest to The libvirt improve the vmware support, especially the mutual transformation of the xml and vmx format guestOS only one parameter.
> >
> > Thanks all.
> >
> 
> Hi,
> 
> This is a known problem. This is not that easy to fix because currently
> libvirt does not expose the guest OS type of the virtual machine in its XML
> config. Therefore, vmx.c has no place to store this information in the XML
> config.
> 
> To fix this the XML config hasto be extended with a guest OS tag.

You should raise the need for this on the development list if you
haven't already.

Dave


> 
> -- 
> Matthias Bolte
> http://photron.blogspot.com

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