How to restart kubernetes nodes?

Question

The status of nodes is reported as unknown

\"conditions\": [
          {
            \"type\": \"Ready\",
            \"status\": \"Unknown\",
          


        

Answer 1

In my case I am running 3 nodes in VM's by using Hyper-V. By using the following steps I was able to "restart" the cluster after restarting all VM's.

1. (Optional) Swap off

   $ swapoff -a

2. You have to restart all Docker containers

   $ docker restart $(docker ps -a -q)

3. Check the nodes status after you performed step 1 and 2 on all nodes (the status is NotReady)

   $ kubectl get nodes

4. Restart the node

   $ systemctl restart kubelet

5. Check again the status (now should be in Ready status)

Note: I do not know if it does metter the order of nodes restarting, but I choose to start with the k8s master node and after with the minions. Also it will take a little bit to change the node state from NotReady to Ready