In this month's unlocked Expert Extra, Red Hat Senior Instructor, Grega Bremec, demos how to upgrade OpenShift.
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i think you have to pause the cluster health check before the upgrade because during the upgrade the nodes may be become unhealthy and the cluster health check will reboot them and you have to take an etcd backup also
nice thanks for sharing, i hope thats all their is to the minor/ major upgrades of OCP
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