Docker Installer Script

Overview

This script automates the process of installing Docker on an Ubuntu-based system, updating system packages, and configuring DNS settings if necessary. It also provides an option to switch to a registry mirror for users in restricted countries.

Features

• Checks system requirements before installation
• Updates system packages
• Installs Docker and necessary dependencies
• Configures a custom DNS if required
• Supports ArvanCloud registry mirror for restricted countries
• Restores original DNS settings after installation (if changed)

Usage

Running the Script

To execute the script, open a terminal and run:

bash installer.sh

You may need to grant execution permission first:

chmod +x installer.sh

Features Explained

System Requirements Check

The script verifies that the system supports the installation process before proceeding.

DNS Configuration

If the script is being run in a restricted country, it allows the user to set custom DNS servers for accessibility.

Docker Installation

The script installs Docker and its dependencies from the official Docker repository.

Registry Mirror Option

Users can choose to configure ArvanCloud as a Docker registry mirror for better access in restricted countries.

Notes

• The script requires sudo privileges to execute certain commands.
• It automatically restores the original DNS configuration after execution if it was modified.
• Ensure your system is connected to the internet before running the script.

Disclaimer

Caution

This script modifies system configurations, including DNS settings. Use with caution and at your own risk. Take backup of /etc/resolv.conf file before executing installer.sh