Re: [libvirt] libvirt can't get capablities
On Mon, Jul 02, 2012 at 05:47:08PM +0800, Li Zhang wrote:
Hi,
I have suffered several times on both x86 machine and power machine.
When we want to use libvirt to create on VMs, it reports "unknown OS
type hvm".
We can't get <guest> capabilities.
The log is as the following(log_level=1):
2003-01-02 01:21:39.895+0000: 12214: error :
virDomainDefParseXML:8491 : unknown OS type hvm
2003-01-02 01:21:39.896+0000: 12214: error :
virDomainDefParseXML:8491 : unknown OS type hvm
2003-01-02 01:22:00.135+0000: 12207: error :
qemuCapsComputeCmdFlags:1218 : unsupported configuration: this qemu
binary requires libvirt to be compiled with yajl
2003-01-02 01:22:13.342+0000: 12207: error :
qemuCapsComputeCmdFlags:1218 : unsupported configuration: this qemu
binary requires libvirt to be compiled with yajl
Hmm, this shows a flaw in the way we deal with QEMU. When detecting
QEMU for the purpose of the capabilities XML, IMHO, we should *not*
be raising this error. Errors in detecting capabilities are more
or less invisible to users of libvirt, since they do not occur in
response to a specific API call.
Thus, we should have reported the capabilities XML as normal here,
and only reported the YAJL compatibility error at the time the user
tries to actually start a guest.
Daniel
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