Docker - DockerCompose - Let's Encrypt

docker-setup.sh

#!/bin/bash

# Function to display a message with a timestamp
function echo_with_timestamp() {
  echo "[$(date +'%Y-%m-%d %H:%M:%S')] $1"
}

echo_with_timestamp "Starting pre-installation script for Docker and (optionally) Certbot..."

# Update and upgrade the package lists
echo_with_timestamp "Updating package lists..."
sudo apt update

echo_with_timestamp "Upgrading installed packages..."
sudo apt upgrade -y

# Install prerequisites
echo_with_timestamp "Installing prerequisites..."
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

# Add Docker's official GPG key
echo_with_timestamp "Adding Docker's GPG key..."
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

# Set up the Docker stable repository
echo_with_timestamp "Setting up Docker repository..."
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Update the package database with Docker packages from the newly added repo
echo_with_timestamp "Updating package lists again..."
sudo apt update

# Ensure that Docker will be installed from the Docker repository
echo_with_timestamp "Checking Docker package..."
apt-cache policy docker-ce

# Install Docker
echo_with_timestamp "Installing Docker..."
yes | sudo apt install -y docker-ce


# Add current user to the Docker group
sudo groupadd docker
echo_with_timestamp "Adding user to Docker group..."
sudo usermod -aG docker $USER

# Verify Docker installation
echo_with_timestamp "Verifying Docker installation..."
sudo systemctl status docker


# Install Docker Compose
echo_with_timestamp "Installing Docker Compose..."
mkdir -p ~/.docker/cli-plugins/
curl -SL https://github.com/docker/compose/releases/download/v2.3.3/docker-compose-linux-x86_64 -o ~/.docker/cli-plugins/docker-compose
chmod +x ~/.docker/cli-plugins/docker-compose

# Ask if Certbot needs to be installed
read -p "Do you need to install Certbot and obtain an SSL certificate? (yes/no): " install_certbot

if [ "$install_certbot" == "yes" ]; then
  # Install Certbot
  echo_with_timestamp "Installing Certbot..."
  sudo snap install --classic certbot

  # Create symlink for Certbot
  echo_with_timestamp "Creating symlink for Certbot..."
  sudo ln -s /snap/bin/certbot /usr/bin/certbot

  # Prompt for user email and domain
  read -p "Please enter your email address for Certbot: " email
  read -p "Please enter your domain for SSL certificate: " domain

  # Obtain SSL certificate using Certbot
  echo_with_timestamp "Obtaining SSL certificate..."
  sudo certbot certonly --standalone --non-interactive --agree-tos -m "$email" -d "$domain"
else
  echo_with_timestamp "Skipping Certbot installation."
fi

echo_with_timestamp "Pre-installation script completed successfully!"
echo_with_timestamp "Please log out and log back in for the Docker group changes to take effect."

# Ask if the user wants to restart the system
read -p "Do you want to restart the system now? (yes/no): " restart_now

if [ "$restart_now" == "yes" ]; then
  echo_with_timestamp "Restarting the system..."
  sudo reboot
else
  echo_with_timestamp "System restart skipped. Please restart the system manually if needed."
fi