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Hi. On Fri, Nov 13, 2015 at 20:44:15 +0000, Sundar Nadathur wrote: > I am using RHEL 7.1 and libvirt 1.2.8. My intention is to intercept > the prepare and start hooks of libvirt during VM placement to > inject a virtio PCI device into the VM's domain xml. You are not supposed to talk to libvirtd from any hooks. > I placed a python...

On Mon, Nov 16, 2015 at 12:43:21 +0000, Sundar Nadathur wrote: > Hello Jirka, > The script is not even invoked for prepare/start calls, not that it > is invoking libvirt APIs or is hanging. When it is invoked for > 'started', it runs to completion. Strange. Do you see corresponding "Calling hook" messages in libvi...

On Thu, Nov 19, 2015 at 21:32:05 +0000, Sundar Nadathur wrote: > Hello, > Is there a reason why the prepare and start hooks cannot modify the > domain xml? Because they were not designed that way. It's already too late to change the domain definition in any of the hooks. > One would think it is a common use case to inject a de...

On 11/30/2015 07:30 PM, Sundar Nadathur wrote: > Hello all, > > I find this curious behavior that libvirt will automatically insert a USB > controller and a memballoon virtio driver into the domain?s XML, when > defineXML is called. IOW, the original XML did not have these 2 devices but > they are present right af...

Hello all, I find this curious behavior that libvirt will automatically insert a USB controller and a memballoon virtio driver into the domain's XML, when defineXML is called. IOW, the original XML did not have these 2 devices but they are present right after defineXML is called. Why should libvirt add a USB controller? DETAILS: Here is a little Python snippet to show that behavior: