I have a Grizzly system and I'm trying to figure out why VM's aren't able to be migrated (using "nova live-migration $UUID $NODE") from one node to another. The error message on the node that it is being migrated from is:
ERROR nova.virt.libvirt.driver [-] [instance: 0522b23c-5c2d-4c45-a66b-24c4c3f4ba9c] Live Migration failure: internal error process exited while connecting to monitor: W: kvm binary is deprecated, please use qemu-system-x86_64 instead There is no message on the node that it is supposed to be migrating to. It was working fine for a while and then it fails. While investigating, I see AUDIT messages in nova-compute.log: 2014-09-23 18:00:45.274 4608 AUDIT nova.compute.resource_tracker [-] Free ram (MB): 80797 2014-09-23 18:00:45.274 4608 AUDIT nova.compute.resource_tracker [-] Free disk (GB): 31369 2014-09-23 18:00:45.274 4608 AUDIT nova.compute.resource_tracker [-] Free VCPUS: -30 The system has 16 cores and has "cpu_allocation_ratio=8.0" in nova.conf so it should have a capacity of 128 VCPU's (right?). Checking with nova-manage: root@compute3:~# nova-manage service describe_resources test3 HOST PROJECT cpu mem(mb) hdd test3 (total) 16 128925 32330 test3 (used_now) 46 48128 960 test3 (used_max) 46 47104 960 . . . It looks like it is calculating Free VCPUS by subtracting "used_now" from "total": 16 - 46 = -30. Is it somehow using this to decide that the node should not take more VM's? If so, I don't know why it allowed it to get as low as -30. Can anyone explain what is going on? Is there other information I can look at to diagnose why the live-migration is failing? Thanks a lot, 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
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