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(a)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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