#!/bin/bash

# Install kubeadm with containerd https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/ & https://kubernetes.io/docs/setup/production-environment/container-runtimes/

#Prepare system for containerd
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

# Setup required sysctl params, these persist across reboots.
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF

# Apply sysctl params without reboot
sudo sysctl --system

#Install containerd
sudo apt-get update && sudo apt-get install -y containerd
# Configure containerd
sudo mkdir -p /etc/containerd
sudo containerd config default > /etc/containerd/config.toml
# Restart containerd
sudo systemctl restart containerd

#install kubeadm
sudo apt-get update && sudo apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl

#Deploy the cluster
sudo kubeadm init --cri-socket /run/containerd/containerd.sock --pod-network-cidr=10.244.0.0/16

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

#install CNI
kubectl taint nodes --all node-role.kubernetes.io/master-
kubectl apply -f  https://docs.projectcalico.org/manifests/canal.yaml

#list containers with runc
sudo runc --root /run/containerd/runc/k8s.io list