I faced this error while resetting my cluster to swap memory enabled node. Basically this error comes if you have swap memory enabled and kubelet service is not able to find eligible node for running services.

After resetting kubernetes cluster on Master node I initialized my kubernetes cluster with extra argument of “–fail-swap-on=false” .

root@ubmaster:/home/ubuntu# echo 'Environment="KUBELET_EXTRA_ARGS=--fail-swap-on=false"' >> /etc/systemd/system/kubelet.service.d/10-kubeadm.conf


ubuntu@ubmaster:~$ sudo kubeadm init --ignore-preflight-errors Swap --pod-network-cidr=xx.xx.xx.xx/24

Solution

So this error I was getting for kubelet services on worker node, after enabling swap and trying to join it with master node.

I verified that new kubeadm.conf file with extra argument was also transferred successfully on worker node, yet it was not taking expected parameters.

What I missed actually was resetting my worker node as well.

root@ubworker:/home/ubuntu# kubeadm reset

Once reset was done, worker node joined cluster and kubelet services came up.