Kubernetes Installation

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cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

# sysctl params required by setup, params persist across reboots
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

# Apply sysctl params without reboot
sudo sysctl --system

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sudo apt-get update
apt install containerd -y
sudo mkdir -p /etc/containerd
containerd config default | sudo tee /etc/containerd/config.toml

Edit SystemdCgroup to `true`
nano /etc/containerd/config.toml

sudo systemctl restart containerd

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# prepare packages on all nodes
sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl

# add GPG
sudo mkdir -p /etc/apt/keyrings
sudo curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

# add Repo
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list

# install
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
sudo swapoff -a

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# init on the master-1 
kubeadm config images pull # if you want to pull image first
kubeadm init --apiserver-advertise-address <address> --control-plan-endpoint <endpoint>:<port> --pod-network-cidr 10.244.0.0/16 --upload-certs

# print join command
kubeadm token create --print-join-command

# join as control-plane
kubeadm join --control-plan-endpoint <endpoint>:<port> --token <token> \
  --discovery-token-ca-cert-hash <hash> \
  --control-plane 

# join as worker
kubeadm join --control-plane-endpoint <endpoint>:<port> --token <token> \
  --discovery-token-ca-cert-hash <hash>

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# get manifest
curl https://raw.githubusercontent.com/projectcalico/calico/v3.27.0/manifests/calico.yaml -O

# apply
kubectl apply -f calico.yaml

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# Kube config
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

# Bash auto complete
echo 'source <(kubectl completion bash)' >>~/.bashrc
echo 'alias k=kubectl' >>~/.bashrc
echo 'complete -o default -F __start_kubectl k' >>~/.bashrc