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Kubernetes

k3s In Ubuntu Server

  • ufw disable - Not Recommended
  • curl -sfL https://get.k3s.io | sh -
  • sudo k3s kubectl get node
  • sudo chmod 644 /etc/rancher/k3s/k3s.yaml - makes the file readable by all users
  • sudo chown $(whoami):$(whoami) /etc/rancher/k3s/k3s.yaml - allows a specific group to access the file

k3s With Docker

  • By default k3s doesn't come with docker support.
  • curl -sfL https://get.k3s.io | sh -s - --docker - Install k3s with docker as container runtime.
    • sudo /usr/local/bin/k3s-uninstall.sh To uninstalled any previously installed k3s

Copy the k3s.yaml to home Directory

cp /etc/rancher/k3s/k3s.yaml ~
sudo chown hyperoot:hyperoot ~/k3s.yaml

And don't forget to change the ownership to current user instead of root. We will further copy this Kubernetes config to our workstation using scp.

cd
scp hyperoot@192.168.1.3:/home/hyperoot/k3s.yaml .

This will allow us to control the cluster from our workstation instead of SSHing into the server again and again.

References: