install-container-runtime.sh

#!/usr/bin/env bash
set -xe

# Configure required sysctl to persist across system 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

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

sudo modprobe overlay
sudo modprobe br_netfilter

#Apply sysctl parameters without rebooting to current running environment
sudo sysctl --system

# Install containerd packages
sudo mkdir -m 0755 -p /etc/apt/keyrings

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update 
sudo apt-get install -y containerd.io


# Create a containerd configuration file
sudo mkdir -p /etc/containerd
sudo containerd config default | sudo tee /etc/containerd/config.toml
# Set the cgroup driver for runc to systemd
sudo sed -i 's/            SystemdCgroup = false/            SystemdCgroup = true/' /etc/containerd/config.toml

echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward
sudo sh -c "echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf"