Openshift: OCP upgrade post check error for node not ready or scheduling disabled

Summary: OCP upgrade post check error for node not ready or scheduling disabled due to VM configured with ReadWriteOnce(RWO) storage volume that cannot be live migrated.

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Symptoms

During OCP upgrade post check process, there could be an error message says "Failed to run post check for OCP cluster. Node is not ready or scheduling disabled."

Cause

One or more VMs configured with ReadWriteOnce(RWO) storage volume that cannot be live migrated on the error reporting node.

Check below Openshift document for more information about storage volumes for virtual machine disks.

https://access.redhat.com/documentation/en-us/openshift_container_platform/4.13/html/virtualization/about-virt

Resolution

1. Change the VM PV settings.
  • 1.1stop the VM instance before changing its PV settings.
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  • 1.2 Click the VM and switch to YAML tab
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  • 1.3 Change accessModes from "ReadWriteOnce" to "ReadWriteMany"
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  • 1.4 If PV cannot be set to ReadWriteMany (the VM cannot start use ReadWriteMany), then set evictionStrategy from LiveMigrate to None
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Note: Please perform either step 1.3 or 1.4 that applies to your environment, don't need to perform both steps.
 
  • 1.5 Click save and restart the VM.
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2. Find the nodes whose status is "Ready,SchedulingDisabled". 
$ oc get node
For example:
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3. Drain the node to remove running pods from it. 
$ oc adm <node name> --ignore-daemonsets --delete-emptydir-data --force
For example: oc adm drain c3-esx01.racka01.local --ignore-daemonsets --delete-emptydir-data --force

4. Set debug mode and reboot the node. 
$ oc debug node/<node name>

$ sh-4.4# chroot /host

$ sh-4.4# systemctl reboot

5. Once node is ready post reboot, mark it as schedulable. 
$ oc adm uncordon <node name>

6. Verify the node is successfully marked as schedulable. 
$ oc get node

Affected Products

APEX Cloud Platform for Red Hat OpenShift
Article Properties
Article Number: 000216593
Article Type: Solution
Last Modified: 18 فبراير 2026
Version:  3
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