Comment 15 for bug 1545897

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Richard Theis (rtheis) wrote :

The VM didn't crash for several live migrations and here is what I observed...

I did as suggested and watched (watch -d -n 5 "sudo ovs-ofctl -O OpenFlow13 dump-flows br-int | cut -f3- -d','") the packet counters in the flows on both compute nodes during the live migration and after when I attempted to ping my VM over the provider network (ping -c1 10.10.0.115). When I saw the ping lose the packet, the counters increased on the wrong compute node (i.e. the compute node where the VM use to be). Trying the ping about a minute later was successful and the counters increased on the correct compute node. I observed this behavior a couple times.

I'm going to try redeploying my environment with larger compute nodes to see if that help prevent the VMs from crashing. I tried using a ubuntu image instead of cirros but didn't have much luck with that...maybe larger compute nodes will help. When the VMs crash, top shows libvirt+ consuming 90+% of the cpu. I would really like to eliminate the VM crash from the picture.