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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 at 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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