K3s Ubuntu Setup

if you need to uninstall k3s

1/usr/local/bin/k3s-uninstall.sh

add key to server

1scp ~/.ssh/ed_id25519.pub mantis@10.10.1.50:~/.ssh/authorized_keys

add key to agent

1scp ~/.ssh/ed_id25519.pub mantis@10.10.1.50:~/.ssh/authorized_keys

SSH into k3s node

Update

1sudo apt-get update
2sudo apt upgrade -y 

Install qemu agent

1sudo apt-get install qemu-guest-agent      

Zsh (optional)

sudo apt-get update
sudo apt-get install zsh
sudo apt-get install powerline fonts-powerline

sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

Fix LVM

sudo lvm

lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv

exit

sudo resize2fs /dev/ubuntu-vg/ubuntu-lv

K3s Install Server

curl -sfL https://get.k3s.io | sh -s - server  --disable servicelb --disable traefik --write-kubeconfig-mode 644 --kube-apiserver-arg default-not-ready-toleration-seconds=30 --kube-apiserver-arg default-unreachable-toleration-seconds=30 --kube-controller-arg node-monitor-period=20s --kube-controller-arg node-monitor-grace-period=20s --kubelet-arg node-status-update-frequency=5s 

Get node Token

Copy this down, you will need it for the agent node

sudo cat /var/lib/rancher/k3s/server/node-token 

Copy config to home

cp /etc/rancher/k3s/k3s.yaml ~/

Exit

K3s Agent Server

Run All the setup commands for ubuntu

Put in your Server Node IP and Token

curl -sfL https://get.k3s.io | K3S_TOKEN=<token> K3S_URL=https://10.10.1.50:6443 sh -s - --kubelet-arg node-status-update-frequency=5s 

Exit

Get Kube Config

Now back on your computer we will get the cube config

Make sure you are in the root of the infrastructure project Replace user@IP

scp mantis@10.10.1.50:~/k3s.yaml k8s/cluster.yaml 

cp k8s/cluster.yaml ~/.kube/config

test with

kubectl get nodes