debian11-k8s-standalone-cluster.bash

debian11-k8s-standalone-cluster.bash

#!/bin/bash
set -xe

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

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system

sudo apt update -y && sudo apt upgrade -y

# CRI-O
OS=Debian_11
CRIO_VERSION=1.24
curl -L https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable:cri-o:$CRIO_VERSION/$OS/Release.key | sudo apt-key add -
curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/Release.key | sudo apt-key add -
echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/ /"|sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
echo "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$CRIO_VERSION/$OS/ /"|sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable:cri-o:$CRIO_VERSION.list
sudo apt update -y && sudo apt upgrade -y
sudo apt install -y cri-o cri-o-runc
sudo systemctl daemon-reload
sudo systemctl enable --now crio

# Kubernetes
sudo apt update -y
sudo apt install -y apt-transport-https ca-certificates curl
sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

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

# Kubeadm
aptversion=$(apt-cache show kubelet | grep -Eo "^Version: .*" | awk '{print $2}' | sort -t '.' -k 2n | grep -Eo '[0-9]+.[0-9]+.[0-9]+' | tail -n 1)

cat <<EOF | sudo tee /etc/kubernetes/kubeadm-config.yaml
kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta3
kubernetesVersion: v${aptversion}
---
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: systemd
EOF

kubeadm init --config /etc/kubernetes/kubeadm-config.yaml

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

# Calico (192.168.0.0/16)
kubectl apply -f https://projectcalico.docs.tigera.io/manifests/calico.yaml