cloud-init.yml

#cloud-config

# Update apt package index
package_update: true
package_upgrade: true

# Install required packages
packages:
  - apt-transport-https
  - ca-certificates
  - curl
  - gnupg
  - lsb-release
  - software-properties-common

# Run commands to install Docker
runcmd:
  # Add Docker's official GPG key
  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
  
  # Add 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" | tee /etc/apt/sources.list.d/docker.list > /dev/null
  
  # Update apt package index again
  - apt-get update
  
  # Install Docker Engine, containerd, and Docker CLI
  - apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
  
  # Start and enable Docker service
  - systemctl start docker
  - systemctl enable docker
  
  # Add ubuntu user to docker group (adjust username as needed)
  - usermod -aG docker ubuntu
  
  # Verify Docker installation
  - docker --version

# Optional: Set timezone
timezone: UTC

# Optional: Configure automatic security updates
package_reboot_if_required: true

# Write additional files if needed
write_files:
  - path: /etc/docker/daemon.json
    content: |
      {
        "log-driver": "json-file",
        "log-opts": {
          "max-size": "10m",
          "max-file": "3"
        }
      }
    permissions: '0644'

# Final message
final_message: "Docker installation completed! System is ready."