On 05/02/2012 04:11 PM, Coding Geek wrote:
On Wed, May 2, 2012 at 7:42 PM, Cole Robinson <crobinso@redhat.com <mailto:crobinso@redhat.com>> wrote:
On 05/02/2012 04:52 AM, Coding Geek wrote: > > > On Mon, Apr 30, 2012 at 9:07 PM, Cole Robinson <crobinso@redhat.com <mailto:crobinso@redhat.com> > <mailto:crobinso@redhat.com <mailto:crobinso@redhat.com>>> wrote: > > On 04/25/2012 07:06 AM, Coding Geek wrote: > > > > Hello > > I am working with 3 host machines each running xen with shared NFS > storage. I > > am working on automatic load balancing if one host is over utilized and > > another is under utilized by measuring the utilization from xentop. I am > > facing a problem after migration of VM. I am setting the flags ( 1| 8| > 16) in > > order to do live migration, persist VM on destination, undefine host from > > source. After migration if I shut off the migrated VM on destination host it > > does not persist. I am using the migrateToURI() API for migration. > > > > Please help how to make VM persist on destination. > > > > There's a flag you can pass to the migration API, VIR_MIGRATE_PERSIST_DEST. > > - Cole > > > Actually I am already using this flag VIR_MIGRATE_PERSIST_DEST but still VM is > not persisting on Destination. Do I need to change something while creating > the VM? >
That flag might not be implemented to xen. But in that case it should explicitly reject the flag. Please file a bug.
But if you need a working solution, you can just do a lookupByName on the remote host after migration, then define that guest to make it persistent.
- Cole
Ok. Before trying your solution one thing i want to ask. After migration I can do lookupByName which returns a domain pointer and then I can get the XML description of domain using getXMLDesc and then "can I still define the domain using defineXML because it returns a newly created domain's pointer?" and domain is already running in transient mode. I do not want to shut off the domain after migration.
Yes, you should be able to define on top of a running transient domain, and it will become persistent. - Cole