Problem joining node to Kubernetes cluster: dial tcp 127.0.0.1:10248: connect: connection refused.

 While trying to setup Kubernetes, you may face this issue while joining the worker nodes to Kubernetes Cluster. 

Error:

[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
[kubelet-check] Initial timeout of 40s passed.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp 127.0.0.1:10248: connect: connection refused.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp 127.0.0.1:10248: connect: connection refused.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp 127.0.0.1:10248: connect: connection refused.

kubernetes error node join

The most common issue is a cgroup driver missmatch. You can look at the kubelet logs. The log should look like this. 

kubelet: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"

To solve that Issue Please follow this document.

After you solve the Kubelet issue , you should be able to join the worker Node. If not try following steps:

1. Reset the kubeadm config:

#kubeadm reset

2. Restart the docker and Kubelet service

#systemctl restart docker

#systemctl restart kubelet

3. Then Join the node to cluster.