setting to invalid for nova as the error is in the ovs python bindings.
marked as triaged for os-vif to track the enhancements proposed in comment 3
above.
** Also affects: ovsdbapp
Importance: Undecided
Status: New
** Changed in: os-vif
Status: New => Triaged
** Changed in: os-vif
Importance: Undecided => Medium
** Changed in: nova
Status: Triaged => Invalid
** Changed in: os-vif
Assignee: (unassigned) => sean mooney (sean-k-mooney)
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https://bugs.launchpad.net/bugs/1929446
Title:
OVS polling loop created by ovsdbapp and os-vif starving n-cpu threads
Status in OpenStack Compute (nova):
Invalid
Status in os-vif:
Triaged
Status in ovsdbapp:
New
Bug description:
I've been seeing lots of failures caused by timeouts in
test_volume_backed_live_migration during the live-migration and
multinode grenade jobs, for example:
https://zuul.opendev.org/t/openstack/build/bb6fd21b5d8c471a89f4f6598aa84e5d/logs
During check_can_live_migrate_source I'm seeing the following gap in
the logs that I can't explain:
12225 May 24 10:23:02.637600 ubuntu-focal-inap-mtl01-0024794054
nova-compute[107012]: DEBUG nova.virt.libvirt.driver [None
req-b5288b85-d642-426f-a525-c64724fe4091 tempest-LiveMigrationTest-312230369
tempest-LiveMigrationTest-312230369-project-admin] [instance:
91a0e0ca-e6a8-43ab-8e68-a10a77ad615b] Check if temp file
/opt/stack/data/nova/instances/tmp5lcmhuri exists to indicate shared storage is
being used for migration. Exists? False {{(pid=107012)
_check_shared_storage_test_file
/opt/stack/nova/nova/virt/libvirt/driver.py:9367}}
[..]
12282 May 24 10:24:22.385187 ubuntu-focal-inap-mtl01-0024794054
nova-compute[107012]: DEBUG nova.virt.libvirt.driver [None
req-b5288b85-d642-426f-a525-c64724fe4091 tempest-LiveMigrationTest-312230369
tempest-LiveMigrationTest-312230369-project-admin] skipping disk /dev/sdb (vda)
as it is a volume {{(pid=107012) _get_instance_disk_info_from_config
/opt/stack/nova/nova/virt/libvirt/driver.py:10458}}
^ this leads to both the HTTP request to live migrate (that's still a
synchronous call at this point [1]) *and* the RPC call from the dest
to the source both timing out.
[1] https://docs.openstack.org/nova/latest/reference/live-
migration.html
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