Kubernetes Errors: Kubernetes nodes are in ‘”network not ready” & “No networks found”

Errors

[ec2-user@ip-172-31-16-114 ~]$ kubectl get nodes
NAME                                           STATUS     ROLES    AGE     VERSION
ip-172-31-16-114.ap-south-1.compute.internal   Ready      master   20h     v1.15.0
ip-172-31-28-73.ap-south-1.compute.internal    NotReady   <none>   5m42s   v1.15.0
[ec2-user@ip-172-31-16-114 ~]$

IN THE NODE
[root@ip-172-31-28-73 ec2-user]# journalctl -u kubelet

Jun 21 08:59:39 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: W0621 08:59:39.861692    2538 cni.go:213] Unable to update cni config: No networks found in /
Jun 21 08:59:40 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: E0621 08:59:40.179277    2538 kubelet.go:2169] Container runtime network not ready: NetworkRe
Jun 21 08:59:44 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: W0621 08:59:44.861915    2538 cni.go:213] Unable to update cni config: No networks found in /
Jun 21 08:59:45 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: E0621 08:59:45.180292    2538 kubelet.go:2169] Container runtime network not ready: NetworkRe
Jun 21 08:59:49 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: W0621 08:59:49.862101    2538 cni.go:213] Unable to update cni config: No networks found in /
Jun 21 08:59:50 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: E0621 08:59:50.181290    2538 kubelet.go:2169] Container runtime network not ready: NetworkRe
Jun 21 08:59:50 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: E0621 08:59:50.910273    2538 pod_workers.go:190] Error syncing pod 8b86e647-7177-4823-a376-7
Jun 21 08:59:54 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: W0621 08:59:54.862323    2538 cni.go:213] Unable to update cni config: No networks found in /
Jun 21 08:59:55 ip-172-31-28-73.ap-south-1.compute.internal kubelet[2538]: E0621 08:59:55.182266    2538 kubelet.go:2169] Container runtime network not ready: NetworkRe
lines 486-528/528 (END)

Solutions

• https://stackoverflow.com/questions/47107117/how-to-debug-when-kubernetes-nodes-are-in-not-ready-state
• https://stackoverflow.com/questions/50085323/kubernetes-worker-node-staying-in-notready-state

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