Guide how to install k8s cluster and connect it with docker registry using https

Firstly you need to install k8s and docker on your machines. Then start up local docker registry with ssl certificate. Follow steps below to install k8s and docker on your node.

Set hostname

sudo hostnamectl set-hostname master-node

or

sudo hostnamectl set-hostname worker-node

ATTENTION! hostname must be unique, i.e. master1-node or master-node1 (2, 3, 4 ...) and same for worker!

Add hostname into /etc/hosts

On worker node(s)

echo "1.2.3.4 master-node" | sudo tee -a /etc/hosts

On master node(s)

echo "1.2.3.5 worker-node" | sudo tee -a /etc/hosts

i.e. your master's node /etc/hosts should contain access for worker node and and vice versa.

Update hostnamed service

sudo systemctl restart systemd-hostnamed

and

exec bash

Turn-off swap file

sudo swapoff -a

It is necessary to commit the changes, that when rebooting the swap file was not included

sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

Download kernel modules

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

sudo modprobe overlay

sudo modprobe br_netfilter

Install kernel parameters

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

Apply changes

sudo sysctl --system

Add Docker official key

sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/docker.gpg

Add Docker repository

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

sudo apt update

Install packeges

sudo apt install -y curl gnupg2 software-properties-common apt-transport-https ca-certificates containerd.io

containerd config default | sudo tee /etc/containerd/config.toml >/dev/null 2>&1

sudo sed -i 's/SystemdCgroup \= false/SystemdCgroup \= true/g' /etc/containerd/config.toml

sudo systemctl restart containerd

sudo systemctl enable containerd

Connection k8s repository

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

sudo apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"

sudo apt update

Install k8s tools

sudo apt install -y kubelet kubeadm kubectl

sudo apt-mark hold kubelet kubeadm kubectl

END OF WORKER INSTALLATION

Run below commands on your master-node to make it master

sudo kubeadm init --control-plane-endpoint=master-node

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

Run this to see a command that you need to run on your worker node to add it.

kubeadm token create --print-join-command

Add Calico

curl https://raw.githubusercontent.com/projectcalico/calico/v3.26.1/manifests/calico.yaml -O

Install Calico

kubectl apply -f calico.yaml

Addition

Docker installation

sudo apt update

sudo apt install ca-certificates gnupg

sudo install -m 0755 -d /etc/apt/keyrings

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

sudo chmod a+r /etc/apt/keyrings/docker.gpg

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt update

sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

To avoid some issues with docker permissions do this

sudo groupadd docker

sudo usermod -aG docker $USER

newgrp docker

I used this guide and docker documentation

Now go to ./certs and read .md file