Hi Abel, Yes, it is the instance load. The console.log seems to get truncated to 0 bytes whenever I do live-migration. All machines (including the nfs server) are using ntp. I just checked visually and all of their times match, at least to the second. Probably it is closer.
I can't find much in the logs. Does anyone live-migrate VM's successfully when volumes are attached? Thanks, Steve On Fri, Sep 12, 2014 at 1:17 PM, Abel Lopez <[email protected]> wrote: > That’s pretty interesting. I haven’t seen that before, tbh, I had been > using gridcentric for live migrations in grizzly, but that’s just because > we didn’t have shared storage. > So, the instance is what is generating the load, right? anything > interesting on the console log? I wonder if there is some time-sync issue > that’s going haywire when it lands on the new host. > But now I’m just speculating. > > On Sep 12, 2014, at 10:13 AM, Stephen Cousins <[email protected]> > wrote: > > Hi Abel, > > I just tried and it did the same thing. Load went up to 800 and the VM is > unreachable. > > Any ideas? > > Thanks, > > Steve > > On Fri, Sep 12, 2014 at 12:59 PM, Abel Lopez <[email protected]> wrote: > >> Does it work if you first detach the volume and then migrate? >> >> >> On Friday, September 12, 2014, Stephen Cousins <[email protected]> >> wrote: >> >>> I am fairly new to Openstack having just inherited a Grizzly system with >>> NFS storage. "nova live-migration" is working unless the VM has an attached >>> volume. When it doesn't work, the VM does move but it is not possible to >>> connect to it and the CPU load on that VM goes up to the number of cores >>> assigned to it. That is, for a VM with 8 cores in it, the load for that >>> qemu-system-x86_64 process goes up to about 800%. Is this a known problem >>> with Grizzly? >>> >>> Here is a description of our system: >>> >>> three machines set up with HA for Quantum (with Open vSwitch), >>> Cinder, RabbitMQ, and Nova. These nodes are all compute nodes too. We also >>> have another machine that is just compute. >>> >>> Cinder and Glance storage is all NFS connected to each machine with the >>> same mount points. >>> >>> The command I am using to do the migration is: >>> >>> nova live-migration $UUID compute3 >>> >>> In some cases the migration has worked when a volume has been attached. >>> Most of the time however, it does not work. >>> >>> Thanks, >>> >>> Steve >>> >>> -- >>> ________________________________________________________________ >>> Steve Cousins Supercomputer Engineer/Administrator >>> Advanced Computing Group University of Maine System >>> 244 Neville Hall (UMS Data Center) (207) 561-3574 >>> Orono ME 04469 steve.cousins at maine.edu >>> >>> > > > -- > ________________________________________________________________ > Steve Cousins Supercomputer Engineer/Administrator > Advanced Computing Group University of Maine System > 244 Neville Hall (UMS Data Center) (207) 561-3574 > Orono ME 04469 steve.cousins at maine.edu > > > -- ________________________________________________________________ Steve Cousins Supercomputer Engineer/Administrator Advanced Computing Group University of Maine System 244 Neville Hall (UMS Data Center) (207) 561-3574 Orono ME 04469 steve.cousins at maine.edu
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