K3S Notes

March 27, 2023

1. Errors running Helm or Kubectl commands on K3S

You will get this error:

Error: Kubernetes cluster unreachable: Get "http://localhost:8080/version?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused

Edit the .bashrc file:

sudo su -
nano ~/.bashrc

put this in the top of this file:

export KUBECONFIG=/etc/rancher/k3s/k3s.yaml

2. Installing K3S Clusters and K3S-HA Clusters

We have created two Shell Scripts:

The Ubuntu Shell Script:
https://github.com/nic0michael/K3S-HA-tutorial/blob/master/CreateHA-ClusterDeploymentCommands4Ubuntu.sh
The Centos/RedHat Shell Script:
https://github.com/nic0michael/K3S-HA-tutorial/blob/master/CreateHA-ClusterDeploymentCommandsRedHatREL.sh

Instructions can be found here:
https://github.com/nic0michael/K3S-HA-tutorial

And a YouTube tutorial here:
https://www.youtube.com/watch?v=pU9_GQn6WX0