I just upgraded kubernetes cluster, but kubectl is very inconsistent in showing me the version. How can I verify this. Any source of truth?
[iahmad@web-prod-ijaz001 k8s-test]$ kubectl version
Client Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.3", GitCommit:"5e53fd6bc17c0dec8434817e69b04a25d8ae0ff0", GitTreeState:"clean", BuildDate:"2019-06-06T01:44:30Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.3", GitCommit:"5e53fd6bc17c0dec8434817e69b04a25d8ae0ff0", GitTreeState:"clean", BuildDate:"2019-06-06T01:36:19Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
[iahmad@web-prod-ijaz001 k8s-test]$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
wp-np3-0b Ready worker 55d v1.14.1
wp-np3-0f Ready worker 55d v1.14.1
wp-np3-45 Ready master 104d v1.13.5
wp-np3-46 Ready worker 104d v1.13.5
wp-np3-47 Ready worker 104d v1.13.5
wp-np3-48 Ready worker 43d v1.14.1
wp-np3-49 Ready worker 95d v1.13.5
wp-np3-76 Ready worker 55d v1.14.1
[iahmad@web-prod-ijaz001 k8s-test]$
IIRC: kubectl version is telling you what version the APIServer is at (1.14.3). kubectl get nodes is telling you what version the kubelet is on those nodes.