I get the error that some nodes are not ‘Ready’. How do I fix the problem?

1. Use ‘kubectl get nodes’ command to find out first which node is not ready.

2. To identify the problem, get access to the shell of the non-ready node . Use ‘systemctl status kubelet’ to get status information about state of kubelet.

3. The most common cause of this error is that the kubelet has the problem of not automatically identify the node. In this case, the kubelet must be restarted manually on the non-ready machine. This is done with ‘systemctl enable kubelet’ and ‘systemctl start kubelet’.

4. If the issue persists, reason behind the error can be evaluated by your cluster administrators.