kubeadm_cluster_setup_ubuntu_2204

On Both Master and Workers

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

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

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

sysctl --system

apt update
apt install -y curl gnupg2 software-properties-common apt-transport-https ca-certificates

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/docker.gpg
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

apt update
apt install -y containerd.io

containerd config default | sudo tee /etc/containerd/config.toml >/dev/null 2>&1
sed -i 's/SystemdCgroup \= false/SystemdCgroup \= true/g' /etc/containerd/config.toml

systemctl restart containerd
systemctl enable containerd

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg


echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list

apt update
apt install -y kubelet kubeadm kubectl
apt-mark hold kubelet kubeadm kubectl


On Master

kubeadm init

mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
kubectl cluster-info
kubectl get nodes


kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.26.0/manifests/calico.yaml

On Worker

Run the join command copied from master cli


https://www.linuxtechi.com/install-kubernetes-on-ubuntu-22-04/