Public bug reported: Description ===========
During stress testing of cold migration, it has been observed that sometimes the PCI devices are not freed by the resource tracker on the source node. If on the source node the periodic resource audit kicks-in in the middle of the migration, the instance uuid is moved from tracked_migrations to tracked_instances. In which case the PCI devices won't get freed because the current logic in the code only cares about tracked_migration (see https://github.com/openstack/nova/blob/master/nova/compute/resource_tracker.py#L355). Steps to reproduce ================== 1) Boot a guest with a SR-IOV device. 2) Migrate and confirm the migration 3) Repeat 2 over and over Expected result =============== In this case the PCI devices will only get freed on the next periodic audit. For PCI resources such as PCI passthrough, those are limited in number and should be freed right away. Actual result ============= The PCI devices are not freed during the confirm_resize stage. Environment =========== $ git log -1 commit 633c817de5a67e798d8610d0df1135e5a568fd8a Author: Matt Riedemann <[email protected]> Date: Sat Nov 12 11:59:13 2016 -0500 api-ref: fix server_id in metadata docs The api-ref was saying that the server_id was in the body of the server metadata requests but it's actually in the path for all of the requests. Change-Id: Icdecd980767f89ee5fcc5bdd4802b2c263268a26 Closes-Bug: #1641331 ** Affects: nova Importance: Undecided Assignee: Ludovic Beliveau (ludovic-beliveau) Status: In Progress -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1641750 Title: PCI devices are sometime not freed after a migration Status in OpenStack Compute (nova): In Progress Bug description: Description =========== During stress testing of cold migration, it has been observed that sometimes the PCI devices are not freed by the resource tracker on the source node. If on the source node the periodic resource audit kicks-in in the middle of the migration, the instance uuid is moved from tracked_migrations to tracked_instances. In which case the PCI devices won't get freed because the current logic in the code only cares about tracked_migration (see https://github.com/openstack/nova/blob/master/nova/compute/resource_tracker.py#L355). Steps to reproduce ================== 1) Boot a guest with a SR-IOV device. 2) Migrate and confirm the migration 3) Repeat 2 over and over Expected result =============== In this case the PCI devices will only get freed on the next periodic audit. For PCI resources such as PCI passthrough, those are limited in number and should be freed right away. Actual result ============= The PCI devices are not freed during the confirm_resize stage. Environment =========== $ git log -1 commit 633c817de5a67e798d8610d0df1135e5a568fd8a Author: Matt Riedemann <[email protected]> Date: Sat Nov 12 11:59:13 2016 -0500 api-ref: fix server_id in metadata docs The api-ref was saying that the server_id was in the body of the server metadata requests but it's actually in the path for all of the requests. Change-Id: Icdecd980767f89ee5fcc5bdd4802b2c263268a26 Closes-Bug: #1641331 To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1641750/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
