Bug 2016654 - Console pods are scheduled on same master node
Summary: Console pods are scheduled on same master node
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Management Console
Version: 4.7
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 4.7.z
Assignee: Jakub Hadvig
QA Contact: Yanping Zhang
Depends On: 2003639
TreeView+ depends on / blocked
Reported: 2021-10-22 15:10 UTC by Mani
Modified: 2021-11-17 21:28 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2021-11-17 21:27:56 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Github openshift console-operator pull 605 0 None open Bug 2016654: Use hard requirements for antiaffinity rules 2021-10-25 06:36:04 UTC
Red Hat Product Errata RHBA-2021:4572 0 None None None 2021-11-17 21:28:18 UTC

Description Mani 2021-10-22 15:10:26 UTC
Bug is the clone of https://bugzilla.redhat.com/show_bug.cgi?id=1975379 to backport the fix to 4.7 

Console pods are scheduled on same master node.

 oc get pods -owide
NAME                        READY   STATUS    RESTARTS   AGE    IP            NODE                                                   NOMINATED NODE   READINESS GATES
console-6558bcb9f9-7cnjk    1/1     Running   1          3d1h   master-1.abc.com   <none>           <none>
console-6558bcb9f9-fwpzf    1/1     Running   0          3d1h   master-1.abc.com   <none>           <none>
downloads-84f554976-9nwr2   1/1     Running   0          3d1h   worker-2.abc.com   <none>           <none>
downloads-84f554976-wl655   1/1     Running   0          3d1h    worker-0.abc.com   <none>           <none>

oc get nodes
NAME               STATUS   ROLES    AGE    VERSION
master-0.abc.com   Ready    master   3d1h   v1.20.0+df9c838
master-1.abc.com   Ready    master   3d1h   v1.20.0+df9c838
master-2.abc.com   Ready    master   3d1h   v1.20.0+df9c838
worker-0.abc.com   Ready    worker   3d1h   v1.20.0+df9c838
worker-1.abc.com   Ready    worker   3d1h   v1.20.0+df9c838
worker-2.abc.com   Ready    worker   3d1h   v1.20.0+df9c838

Console Pod is getting scheduled on same master node due to `preferredDuringSchedulingIgnoredDuringExecution` which is the soft requirement rather than `requiredDuringSchedulingIgnoredDuringExecution` which is the hard requirement.

Actual results:
Console pods are scheduled on the same master node

Expected results:
Console pods should be scheduled on the different master node

Comment 1 Jakub Hadvig 2021-10-25 06:32:18 UTC
Just for note: this should be tested on a regular cluster, not a single node cluster, since that feature was introduced in 4.8

Comment 6 errata-xmlrpc 2021-11-17 21:27:56 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 4.7.37 bug fix update), and where to find the updated
files, follow the link below.

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


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