k8s-multi-node-setup

sudo hostnamectl set-hostname k8s-master01.hatigen.com  ##--> On master node
sudo hostnamectl set-hostname k8s-worker01.hatigen.com  ##--> On worker node
exit

On Both Nodes
##############
sudo apt update
sudo apt -y upgrade && sudo systemctl reboot
sudo apt update
sudo apt -y install curl apt-transport-https
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
sudo apt update
sudo apt -y install vim git curl wget kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
kubectl version --client && kubeadm version
sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
sudo swapoff -a
sudo modprobe overlay
sudo modprobe br_netfilter
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

sudo sysctl --system
sudo apt update
sudo apt install -y curl gnupg2 software-properties-common apt-transport-https ca-certificates
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt update
sudo apt install -y containerd.io docker-ce docker-ce-cli
sudo mkdir -p /etc/systemd/system/docker.service.d
sudo tee /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF

sudo systemctl daemon-reload
sudo systemctl restart docker
sudo systemctl enable docker

sudo vi /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
Environment="cgroup-driver=systemd/cgroup-driver=cgroupfs"   ##--> Add this line to the file

sudo systemctl enable kubelet
sudo systemctl daemon-reload
lsmod | grep br_netfilter


On Master Node:
###############
sudo kubeadm config images pull
hostname
sudo kubeadm init   --pod-network-cidr=192.168.0.0/16   --control-plane-endpoint=k8s-master01.hatigen.com
sudo systemctl status kubelet
kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
kubectl get pods
kubectl get nodes