On Wed, 2016-08-24 at 11:18 -0400, Daniel P. Berrange wrote: > On Wed, Aug 24, 2016 at 05:07:50PM +0200, Alberto Planas Dominguez > wrote:
Daniel, thanks for the fast reply!! > > Unfortunately was closed as invalid, and the solution provided is > > completely unrelated. The solution suggested is based on > > `live_migration_inbound_addr`, that is related with the libvirtd > > URI, > > not the qmeu one. I tested several times and yes, this solution is > > not > > related with the problem. > > The "live_migration_inbound_addr" configuration parameters was > intended > to affect both libvirt & QEMU traffic. If that is not working > correctly, > then we should be fixing that, nto adding yet another parameter. The code in libvirt is very clear: if uri_in is NULL will ask to the hostname to the other side. I checked the code in 1.2.18: https://github.com/libvirt/libvirt/blob/v1.2.18-maint/src/qemu/qemu_mig ration.c#L3601 https://github.com/libvirt/libvirt/blob/v1.2.18-maint/src/qemu/qemu_mig ration.c#L3615 The same logic is in master: https://github.com/libvirt/libvirt/blob/master/src/qemu/qemu_migration. c#L4013 But we can go back to 0.9.12: https://github.com/libvirt/libvirt/blob/v0.9.12-maint/src/qemu/qemu_mig ration.c#L1472 Nova set migration_uri parameter to None, that this means that uri_in is NULL. How can I affect the the QEMU part? The code path AAIU is: if we do not set miguri (migrateToURI2) or migrate_uri (migrateToURI3), is a uri_in=NULL. I am not familiar with libvirt code, please, help me to find how I can affect this uri_in parameter to have a value different from the hostname of the other node, without setting the correct value in migrateToURI[23] in the Nova side. > > this patch will create a second uri: > > > > migrate_uri=tcp://fast.%s/ > > While you can do that hack, the fact that is works is simply luck - > it > certainly was not designed with this kind of usage in mind. We would > in fact like to remove the live_migration_uri config parameter > entirely > and having the libvirt driver automatically use the correct URI. This is a very interesting suggestion! I can see that in /etc/libvirt.qemu.conf there is a parameter for 'migration_address', that is the -incoming side of the migration. What I am not able to see is how I can change the hostname (to select the correct interface) from the source of the migration. I see the default value in `migration_host`, but my tests didn't work to set the uri_in properly -- SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) Maxfeldstraße 5, 90409 Nürnberg, Germany __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
