Re: [libvirt] Support to transfer OVSDB:Interface stats during Live Migration
On 07/26/2012 09:40 PM, kiran Chunduri wrote:
Hi,
I was experimenting 'live migration' with libvirt (using virsh) and
observed that post migration the Interface stats in 'OVSDB:Interface'
table are not transferred.
I'm assuming that the "OVS" part of this is openvswitch?
Only the values in 'external_ids' column seem to be synced
up. The
libvirt version I'm using is 0.9.11.3. The virsh command used for
migration is: 'virsh migrate --live fc17-vm
qemu+ssh://10.23.167.219/system <http://10.23.167.219/system>'
Is this the right behavior (or) Have I missed out on some option?
I don't know if it's "right", but moving state that's outside of
the
guest itself is outside the scope of migration, at least for now.
Can some one please guide on the approach and the source files to look
at If i need to add this support?
I don't really have a good idea about that. Could the information
related to a given guest interface be easily represented in XML within
the <interface> section of the guest's domain XML (which is the only
thing aside from an image of the guest's memory, and state of the
guest's emulated devices, that is transferred during a migration)? If
that's the case, maybe the openvswitch support in libvirt could be
extended to, for example, recognize some extra stuff inside of the
<virtualport type='openvswitch'> element when resuming a paused (due to
migration or save) guest, and use that data to populate the db.