1. Description
2. Features
3. Requirements
4. Installation
5. Configuration
6. Usage
7. Examples
8. Dependencies
9. Troubleshooting
10. Contributing
11. License

Cloudflare DNS Updater is a bash script designed to automate the management of DNS records in Cloudflare. It allows updating A (IPv4) and AAAA (IPv6) records for multiple domains, offering flexible configuration options and various notification methods.

• DNS Record Management:

  • Update A (IPv4) and AAAA (IPv6) records
  • Support for multiple domains
  • Create new DNS records if they don't exist (optional)
  • Delete DNS records when IPv4 or IPv6 is set to false

• Configuration:

  • YAML configuration file for easy setup
  • Command-line options for quick adjustments
  • Support for environment variables for sensitive data

• Performance:

  • Parallel processing of domains
  • Configurable retry mechanism for API requests

• Testing and Debugging:

  • Test mode (dry run) for verification without making changes
  • Extensive logging capabilities
  • Debug mode for detailed output

• Notification Systems:

  • Multiple notification methods (Email, Telegram, Slack, Discord)

• User Interface:

  • Colorized terminal output with progress indication
  • Man page for easy reference

• Bash 4.0+
• curl
• jq (JSON parser)

• yq (YAML parser)

• openssl (for email notifications)
• netcat (for email notifications)

1. Clone the repository:

   git clone https://github.com/yourusername/cloudflare-dns-updater.git

2. Make the script executable:

   chmod +x cloudflare-dns.sh

3. (Optional) Copy the script to a directory in your PATH for system-wide access:

   sudo cp cloudflare-dns.sh /usr/local/bin/cloudflare-dns

4. (Optional) Install the man page:

   sudo mkdir -p /usr/local/man/man1
   sudo cp cloudflare-dns.1 /usr/local/man/man1/
   sudo mandb

Create a YAML configuration file named cloudflare-dns.yaml in the same directory as the script or specify a custom path using the -c option. Here's an example configuration:

# Cloudflare account settings
cloudflare:
  zone_id: "your_zone_id_here"
  zone_api_token: "your_api_token_here"

# Global settings (applied to all domains unless overridden)
globals:
  ipv4: true
  ipv6: true
  proxied: true
  ttl: auto
  enable_create_record: false

# Domain-specific settings
domains:
  - name: example.com
    ipv4: true
    ipv6: true
    proxied: true
    ttl: 1
  - name: subdomain.example.com
    ipv4: true
    ipv6: false
    proxied: false
    ttl: 3600

# Advanced settings
advanced:
  retry_attempts: 3
  retry_interval: 5
  max_parallel_jobs: 5

# Notification settings
notifications:
  telegram:
    enabled: false
    bot_token: "your_telegram_bot_token"
    chat_id: "your_telegram_chat_id"
  email:
    enabled: true
    smtp_server: "smtp.example.com"
    smtp_port: 587
    use_ssl: true
    username: "[email protected]"
    password: "your_email_password"
    from_address: "[email protected]"
    to_address: "[email protected]"
    subject: "Cloudflare DNS Update Notification"
  slack:
    enabled: false
    webhook_url: "https://hooks.slack.com/services/YOUR/SLACK/WEBHOOK"
  discord:
    enabled: false
    webhook_url: "https://discord.com/api/webhooks/YOUR/DISCORD/WEBHOOK"

# Logging settings
logging:
  file: "/var/log/cloudflare-dns.log"
  terminal_output: true
  debug_mode: false

1. API Token:

   • Log in to your Cloudflare account.
   • Go to "My Profile" > "API Tokens".
   • Click "Create Token".
   • Use the "Edit zone DNS" template or create a custom token with the necessary permissions Copy the generated token.

2. Zone ID:

   • Log in to your Cloudflare account.
   • Select the domain you want to manage.
   • The Zone ID is displayed on the right side of the overview page.
   • Copy the Zone ID.

Basic usage:

cloudflare-dns [COMMAND] [OPTIONS]

1. Update DNS records using the default configuration file:

   cloudflare-dns update

2. Update DNS records using a custom configuration file:

   cloudflare-dns update -c my_config.yaml

3. Run in test mode (dry run) without making changes:

   cloudflare-dns test

4. Update specific domains:

   cloudflare-dns update --domains example.com,subdomain.example.com

5. Use environment variables for sensitive data:

   export CF_API_TOKEN="your_api_token_here"
   export CF_ZONE_ID="your_zone_id_here"
   cloudflare-dns update

   Or:

   CF_API_TOKEN=your_token CF_ZONE_ID=your_zone_id cloudflare-dns update

6. Update DNS records with custom options:

   cloudflare-dns update --ipv4 false --ipv6 true --proxied false --ttl 3600

1. Create a configuration file cloudflare-dns.yaml:

   cloudflare:
     zone_id: "44d43a33307a232a60a5af4fc1504613"
     zone_api_token: "rY7s0ciXH9ARs3FkxChCdBIti_X15oT_bSUN7xQP"
   
   globals:
     ipv4: true
     ipv6: true
     proxied: true
     ttl: auto
   
   domains:
     - name: example.com
     - name: blog.example.com
       ipv6: false
     - name: api.example.com
       proxied: false
       ttl: 3600
   
   advanced:
     retry_attempts: 3
     retry_interval: 5
     max_parallel_jobs: 2
   
   notifications:
     email:
       enabled: true
       smtp_server: "smtp.gmail.com"
       smtp_port: 587
       use_ssl: true
       username: "[email protected]"
       password: "your_gmail_app_password"
       from_address: "[email protected]"
       to_address: "[email protected]"
   
   logging:
     file: "cloudflare-dns.log"
     terminal_output: true
     verbosity: "info"

2. Run the script in test mode:

   cloudflare-dns test -c cloudflare-dns.yaml

   This will show what changes would be made without actually applying them.

3. If satisfied with the proposed changes, run the script to update the records:

   cloudflare-dns update -c cloudflare-dns.yaml

4. Review the terminal output and log file to confirm the changes were applied correctly.

Generally pre-installed on Linux systems. On macOS, you can update it using Homebrew:

brew install bash

More information about Bash.

Tool for transferring data with URL syntax. Installation:

• On Ubuntu/Debian: sudo apt-get install curl
• On CentOS/Fedora: sudo yum install curl
• On macOS with Homebrew: brew install curl

More information about curl.

Command-line JSON processor. Installation:

• On Ubuntu/Debian: sudo apt-get install jq
• On CentOS/Fedora: sudo yum install jq
• On macOS with Homebrew: brew install jq

More information about jq.

Command-line YAML processor. Installation:

• On Ubuntu/Debian: sudo apt-get install yq
• On CentOS/Fedora: sudo yum install yq
• On macOS with Homebrew: brew install yq

More information about yq.

Cryptography toolkit. Generally pre-installed. If not:

• On Ubuntu/Debian: sudo apt-get install openssl
• On CentOS/Fedora: sudo yum install openssl
• On macOS with Homebrew: brew install openssl

More information about openssl.

Networking utility for reading from and writing to network connections. Installation:

• On Ubuntu/Debian: sudo apt-get install netcat
• On CentOS/Fedora: sudo yum install netcat
• On macOS with Homebrew: brew install netcat

More information about netcat.

1. Script cannot connect to Cloudflare API
   • Check your internet connection.
   • Ensure your Cloudflare API token is valid and has the correct permissions.
   • Review debug logs for more information.
   • Verify that the Cloudflare API endpoint is not blocked by your firewall.
2. DNS records are not updating
   • Confirm that domains are correctly configured in the YAML file.
   • Verify that you have permissions to modify DNS records in Cloudflare.
   • Run the script in debug mode for more details.
   • Check if the Cloudflare zone (domain) is active and not pending.
3. Notifications are not being sent
   • Review notification settings in the YAML file.
   • Ensure your notification service credentials are correct.
   • Verify that your mail server or webhook service is functioning properly.
   • Check your firewall settings to ensure outgoing connections are allowed.
4. Script is running slowly
   • Reduce the number of domains being processed simultaneously.
   • Check your internet connection speed.
   • Ensure that your system's DNS resolution is working correctly.
5. Error: "jq: command not found" or similar
   • Make sure all dependencies are installed correctly.
   • Verify that the installed tools are in your system's PATH.
   • Try reinstalling the missing dependency.
6. YAML parsing errors
   • Validate your YAML configuration file syntax. Use an online YAML validator or a linter. Examples: YAML Lint, Online YAML Parser.
   • Ensure there are no tabs used for indentation (use spaces instead).
   • Check for any special characters that might need to be escaped.
7. Permission denied errors
   • Ensure the script has execute permissions (chmod +x cloudflare-dns.sh).
   • Check if you have write permissions for the log file directory.
8. API rate limiting issues
   • Increase the retry_interval in the advanced settings.
   • Reduce the max_parallel_jobs to lower the number of simultaneous API calls.

For additional help, review the debug logs or open an issue on the GitHub repository.

Contributions are welcome! Please feel free to submit a Pull Request (AKA Merge Request) with your changes or improvements. If you encounter any issues or have suggestions for new features, please open an issue on the GitHub repository.

This project is licensed under the GNU General Public License v3.0. For more information, see the LICENSE file.