[libvirt] Libvirt synchronous hooks

[edison]

I have the same problem, that needs to do some extra things, not supported
by libvirt API, such as setting up vlan, getting host/guest statistics etc.
Right now, I have agent running on the host, which communicating with my
management server. My agent is connecting to libvirt daemon on the same
machine. In this way, I have to setup agent on each physical machine.
Will libvirt provide the API, like XAPI's call_plugin (
http://www.xen.org/files/XenCloud/ocamldoc/apidoc.html?c=host)? In
call_plugin, I can do whatever I want and at any time, which is much
flexible than libvirt's hooks, IMHO.


On Tue, Jun 29, 2010 at 7:03 AM, Radek Hladik <radek at eadresa.cz> wrote:

> I am trying Libvirt synchronous hooks and I would like to ask a question. I
> would like to use the machine start (qemu+kvm) hook to set up the storage
> for the machine. I already mentioned my setup in this mailing list but for
> now it is only important that VM storage is a md raid constructed from iSCSI
> disks. The VM's config is using simple file device:
> <disk type='file' device='disk'>
>  <driver name='qemu' type=''/>
>  <source
> file='/dev/disk/by-id/md-uuid-e464a51e:f61e98b4:bfe78010:bc810f04'/>
>   <target dev='vda' bus='virtio'/>
>    <address type='pci' domain='0x0000' bus='0x00' slot='0x05'
> function='0x0'/>
>  </disk>
>
> Stopping the array from stop hook works perfectly however it seems that on
> the startup  the storage is checked before the hook is executed. At least I
> do get errors that the storage file (/dev/disk/by-id/md-uuid-....) does not
> exist and my hook is not called.
>
> I would say that I am hooking on wrong places that I should hook on storage
> startup/shutdown but as far as I know there are no hooks for storage
> drivers. Are there any plans in this area? Or is there any other way how to
> do it that I do not see?
>
> Radek
>
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