Bug 1856344

Summary: [sig-cluster-lifecycle][Feature:Machines][Serial] Managed cluster should grow and decrease when scaling different machineSets simultaneously
Product: OpenShift Container Platform Reporter: Vadim Rutkovsky <vrutkovs>
Component: Cloud ComputeAssignee: Danil Grigorev <dgrigore>
Cloud Compute sub component: Other Providers QA Contact: sunzhaohua <zhsun>
Status: CLOSED ERRATA Docs Contact:
Severity: medium    
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Version: 4.6   
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Target Release: 4.6.0   
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[sig-cluster-lifecycle][Feature:Machines][Serial] Managed cluster should grow and decrease when scaling different machineSets simultaneously
Last Closed: 2020-10-27 16:13:56 UTC Type: Bug
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Description Vadim Rutkovsky 2020-07-13 12:45:58 UTC 
test:
[sig-cluster-lifecycle][Feature:Machines][Serial] Managed cluster should grow and decrease when scaling different machineSets simultaneously 

is failing frequently in CI, see search results:
https://search.svc.ci.openshift.org/?maxAge=168h&context=1&type=bug%2Bjunit&name=&maxMatches=5&maxBytes=20971520&groupBy=job&search=%5C%5Bsig-cluster-lifecycle%5C%5D%5C%5BFeature%3AMachines%5C%5D%5C%5BSerial%5C%5D+Managed+cluster+should+grow+and+decrease+when+scaling+different+machineSets+simultaneously


Affects openstack (16% of all failures in serial tests), gcp, aws and azure, e.g.
https://deck-ci.apps.ci.l2s4.p1.openshiftapps.com/view/gcs/origin-ci-test/pr-logs/pull/25272/pull-ci-openshift-origin-release-4.5-e2e-aws-serial/1281702902192148480:

Jul 10 22:59:45.201: INFO: Error getting nodes from machineSet: not all machines have a node reference: map[ci-op-lc0wsswr-fb238-fz5m4-worker-us-west-2b-d5wzf:ip-10-0-200-187.us-west-2.compute.internal]

Probably related to throttling issues on all platforms
Comment 4 sunzhaohua 2020-07-28 10:54:32 UTC 
Checked the latest CI test with the serialized patch and didn't see the same flakiness anymore on gcp, aws, azure: 
https://testgrid.k8s.io/redhat-openshift-ocp-release-4.6-informing#release-openshift-ocp-installer-e2e-gcp-serial-4.6
https://testgrid.k8s.io/redhat-openshift-ocp-release-4.6-informing#release-openshift-ocp-installer-e2e-aws-serial-4.6
https://testgrid.k8s.io/redhat-openshift-ocp-release-4.6-informing#release-openshift-ocp-installer-e2e-azure-serial-4.6
Comment 6 errata-xmlrpc 2020-10-27 16:13:56 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.6 GA Images), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4196