How to start kubelet service? - kubernetes

Question

I ran command
systemctl stop kubelet
then try to start it
systemctl start kubelet
but can't able to start it
here is the output of systemctl status kubelet
kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/lib/systemd/system/kubelet.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/kubelet.service.d
└─10-kubeadm.conf
Active: activating (auto-restart) (Result: exit-code) since Wed 2019-06-05 15:35:34 UTC; 7s ago
Docs: https://kubernetes.io/docs/home/
Process: 31697 ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS (code=exited, status=255)
Main PID: 31697 (code=exited, status=255)
Because of this i am not able to run any kubectl command
example kubectl get pods gives
The connection to the server 172.31.6.149:6443 was refused - did you specify the right host or port?

Answer 1

Worked
Need to disable swap using swapoff -a
then,
try to start it systemctl start kubelet

Answer 2

So i need to reset kubelete service
Here are the step :-
check status of your docker service.
If stoped,start it by cmd sudo systemctl start docker.
If not installed installed it
#yum install -y kubelet kubeadm kubectl docker
Make swap off by #swapoff -a
Now reset kubeadm by #kubeadm reset
Now try #kudeadm init
after that check #systemctl status kubelet
it will be working
Check nodes
kubectl get nodes
if Master Node is not ready ,refer following
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
if you not able to create pod ..check dns
kubectl get pods --namespace=kube-system
if dns pods are in pending state
i.e you need to use network service
i used calico
kubectl apply -f https://docs.projectcalico.org/v3.7/manifests/calico.yaml
Now your master node is ready .. now you can deploy pod