• You can setup self managed k8s cluster by following steps below
• or just use digital ocean or aws EKS, they will setup cluster for you
• good luck!

System Prerequisites

• Disable swap

sudo swapoff -a

• Disable from fstab line with swap partition, add # at start

sudo sed -i '/ swap / s/^/#/' /etc/fstab

• Configure kernel modules and networking

cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF

sudo sysctl --system

Install containerd (Ubuntu)

• https://docs.docker.com/engine/install/ubuntu
• follow steps in docs and install it

sudo apt-get install containerd.io

• generate default containerd config, open it and follow these steps

sudo mkdir -p /etc/containerd
sudo containerd config default | sudo tee /etc/containerd/config.toml

vim /etc/containerd/config.toml

Install kubeadm, kubelet and kubectl

• follow these steps

Note

all those steps before, you need to do also for worker nodes

init cluster

it will print some instructions to run

sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --skip-phases=addon/kube-proxy

Install cilium with helm

• follow these steps
• after that, install cilium cli and wait for status validation

cilium status --wait

Check if k8s master node correctly configured

nc 127.0.0.1 6443 -zv -w 2

kubectl get pods -A

• first command should print something like
• Connection to 127.0.0.1 6443 port [tcp/*] succeeded!
• for second one everything should be in Running status