install-kubernetes-dependencies.sh

#!/bin/bash -ex


install_required_packages ()
{
sudo apt-get update
sudo apt-get -y install curl apt-transport-https gnupg
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-get update
sudo apt-get -y install vim git curl wget kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
}

configure_hosts_file ()
{
sudo tee /etc/hosts<<EOF
172.16.8.10 master
172.16.8.11 node-01
EOF
}

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

configure_sysctl ()
{
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
}

install_docker_runtime () 
{
sudo apt-get update
sudo apt-get install -y curl gnupg2 software-properties-common apt-transport-https ca-certificates
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"
sudo apt-get update
sudo apt-get install -y containerd.io docker-ce docker-ce-cli docker-buildx-plugin docker-compose-plugin
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

#sed -i 's/plugins.cri.systemd_cgroup = false/plugins.cri.systemd_cgroup = true/' /etc/containerd/config.toml
containerd config dump > /etc/containerd/config.toml
sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /etc/containerd/config.toml
sudo systemctl enable containerd
sudo systemctl restart containerd
}

install_nerdctl_runtime () 
{
curl -fsSLO https://github.com/containerd/nerdctl/releases/download/v1.2.1/nerdctl-1.2.1-linux-amd64.tar.gz
tar zxf nerdctl-1.2.1-linux-amd64.tar.gz
sudo cp nerdctl /usr/local/bin
}

install_required_packages
configure_hosts_file
disable_swap
configure_sysctl
install_docker_runtime
install_nerdctl_runtime