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FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/nova refs/changes/46/853546/1"}}},"commit":{"parents":[{"commit":"fa540fabce020cade91adb52800197f688c843d9","subject":"[CI] Fix gate by using zuulv3 live migration and grenade jobs","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/fa540fabce020cade91adb52800197f688c843d9"}]}],"author":{"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","date":"2021-07-02 19:10:52.000000000","tz":-420},"committer":{"name":"Jay Faulkner","email":"jay@jvf.cc","date":"2022-08-17 22:04:04.000000000","tz":-420},"subject":"[ironic] Minimize window for a resource provider to be lost","message":"[ironic] Minimize window for a resource provider to be lost\n\nThis patch is based upon a downstream patch which came up in discussion\namongst the ironic community when some operators began discussing a case\nwhere resource providers had disappeared from a running deployment with\nseveral thousand baremetal nodes.\n\nDiscussion amongst operators and developers ensued and we were able\nto determine that this was still an issue in the current upstream code\nand that time difference between collecting data and then reconciling\nthe records was a source of the issue. Per Arun, they have been running\nthis change downstream and had not seen any reoccurances of the issue\nsince the patch was applied.\n\nThis patch was originally authored by Arun S A G, and below is his\noriginal commit mesage.\n\nAn instance could be launched and scheduled to a compute node between\nget_uuids_by_host() call and _get_node_list() call. If that happens\nthe ironic node.instance_uuid may not be None but the instance_uuid\nwill be missing from the instance list returned by get_uuids_by_host()\nmethod. This is possible because _get_node_list() takes several minutes to return\nin large baremetal clusters and a lot can happen in that time.\n\nThis causes the compute node to be orphaned and associated resource\nprovider to be deleted from placement. Once the resource provider is\ndeleted it is never created again until the service restarts. Since\nresource provider is deleted subsequent boots/rebuilds to the same\nhost will fail.\n\nThis behaviour is visibile in VMbooter nodes because it constantly\nlaunches and deletes instances there by increasing the likelihood\nof this race condition happening in large ironic clusters.\n\nTo reduce the chance of this race condition we call _get_node_list()\nfirst followed by get_uuids_by_host() method.\n\nChange-Id: I55bde8dd33154e17bbdb3c4b0e7a83a20e8487e8\nCo-Authored-By: Arun S A G \u003csaga@yahoo-inc.com\u003e\nRelated-Bug: #1841481\n(cherry picked from commit f84d5917c6fb045f03645d9f80eafbc6e5f94bdd)\n(cherry picked from commit 0c36bd28ebd05ec0b1dbae950a24a2ecf339be00)\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/a6b5733baf8a65b338d4ba05c644bf39e92fddc6"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/a6b5733baf8a65b338d4ba05c644bf39e92fddc6"}]},"branch":"refs/heads/stable/train"},"912fabac79ae48a856de9786678846efa01395b1":{"kind":"TRIVIAL_REBASE_WITH_MESSAGE_UPDATE","_number":2,"created":"2022-08-23 17:15:01.000000000","uploader":{"_account_id":17685,"name":"Elod Illes","email":"elod.illes@est.tech","username":"elod.illes"},"ref":"refs/changes/46/853546/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/nova","ref":"refs/changes/46/853546/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/nova refs/changes/46/853546/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/nova refs/changes/46/853546/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/nova refs/changes/46/853546/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/nova refs/changes/46/853546/2"}}},"commit":{"parents":[{"commit":"783c855ede2021923d23c1d43763d38776d682f3","subject":"Merge \"Don\u0027t unset Instance.old_flavor, new_flavor until necessary\" into stable/train","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/783c855ede2021923d23c1d43763d38776d682f3"}]}],"author":{"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","date":"2021-07-02 19:10:52.000000000","tz":-420},"committer":{"name":"Elod Illes","email":"elod.illes@est.tech","date":"2022-08-23 17:13:34.000000000","tz":120},"subject":"[ironic] Minimize window for a resource provider to be lost","message":"[ironic] Minimize window for a resource provider to be lost\n\nThis patch is based upon a downstream patch which came up in discussion\namongst the ironic community when some operators began discussing a case\nwhere resource providers had disappeared from a running deployment with\nseveral thousand baremetal nodes.\n\nDiscussion amongst operators and developers ensued and we were able\nto determine that this was still an issue in the current upstream code\nand that time difference between collecting data and then reconciling\nthe records was a source of the issue. Per Arun, they have been running\nthis change downstream and had not seen any reoccurances of the issue\nsince the patch was applied.\n\nThis patch was originally authored by Arun S A G, and below is his\noriginal commit mesage.\n\nAn instance could be launched and scheduled to a compute node between\nget_uuids_by_host() call and _get_node_list() call. If that happens\nthe ironic node.instance_uuid may not be None but the instance_uuid\nwill be missing from the instance list returned by get_uuids_by_host()\nmethod. This is possible because _get_node_list() takes several minutes to return\nin large baremetal clusters and a lot can happen in that time.\n\nThis causes the compute node to be orphaned and associated resource\nprovider to be deleted from placement. Once the resource provider is\ndeleted it is never created again until the service restarts. Since\nresource provider is deleted subsequent boots/rebuilds to the same\nhost will fail.\n\nThis behaviour is visibile in VMbooter nodes because it constantly\nlaunches and deletes instances there by increasing the likelihood\nof this race condition happening in large ironic clusters.\n\nTo reduce the chance of this race condition we call _get_node_list()\nfirst followed by get_uuids_by_host() method.\n\nChange-Id: I55bde8dd33154e17bbdb3c4b0e7a83a20e8487e8\nCo-Authored-By: Arun S A G \u003csaga@yahoo-inc.com\u003e\nRelated-Bug: #1841481\n(cherry picked from commit f84d5917c6fb045f03645d9f80eafbc6e5f94bdd)\n(cherry picked from commit 0c36bd28ebd05ec0b1dbae950a24a2ecf339be00)\n(cherry picked from commit 67be896e0f70ac3f4efc4c87fc03395b7029e345)\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/912fabac79ae48a856de9786678846efa01395b1"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/912fabac79ae48a856de9786678846efa01395b1"}]},"branch":"refs/heads/stable/train"}},"requirements":[],"submit_records":[{"rule_name":"gerrit~DefaultSubmitRule","status":"CLOSED","labels":[{"label":"Verified","status":"OK","applied_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]}},{"label":"Code-Review","status":"OK","applied_by":{"_account_id":4690,"name":"melanie witt","display_name":"melwitt","email":"melwittt@gmail.com","username":"melwitt"}},{"label":"Workflow","status":"OK","applied_by":{"_account_id":4690,"name":"melanie witt","display_name":"melwitt","email":"melwittt@gmail.com","username":"melwitt"}},{"label":"Review-Priority","status":"MAY"}]}],"submit_requirements":[]}