Kubernetes upgrade from 1.9 to 1.12 fails using kubeadm-upgrade
(Doc ID 2533781.1)
Last updated on MAY 14, 2020
Applies to:Linux OS - Version Oracle Linux 7.4 with Unbreakable Enterprise Kernel [4.1.12] and later
When trying to upgrade Kubernetes from 1.9 to 1.12, the upgrade shows success, but actually did not complete properly.
After the upgrade older versions are still seen.
$ kubectl get nodes$ kubectl get nodes NAME STATUS ROLES AGE VERSION WORKER_HOSTNAME; Ready ;none; 29m v1.9.11+2.2.1.el7 MASTER_HOSTNAME; NotReady master 35m v1.10.5+2.2.4.el7 WORKER_HOSTNAME; Ready ;none; 26m v1.9.11+2.2.1.el7
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