Dreamhost DNS Update

A simple Node script I put together to automatically update the DNS A record for my home server with the current dynamic IP address. Based on Dreamhost DNS Updater and the Dreamhost DNS API.

Installation

Install dependencies

npm install

Specify the record to update and Dreamhost API key in config.js

module.exports = {
	hostname: "example.domain.com",
	key: "DREAMHOST API KEY"
};

Command-line usage

To run immediately

$ node update.js

LaunchAgent usage (OSX)

To run automatically, create a launch agent, e.g. ~/Library/LaunchAgents/com.example.dh-dns-update.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>com.example.dh-dns-update</string>
    <key>ProgramArguments</key>
    <array>
      <string>/usr/local/bin/node</string>
      <string>/path/to/dh-dns-update/update.js</string>
    </array>
    <key>StandardOutPath</key>
    <string>/path/to/dh-dns-update/status.log</string>
    <key>StandardErrorPath</key>
    <string>/path/to/dh-dns-update/status.log</string>
    <key>StartInterval</key>
    <integer>43200</integer>
  </dict>
</plist>

Then load the plist file

launchctl load ~/Library/LaunchAgents/com.example.dh-dns-update.plist

Verify it works by running

launchctl start com.example.dh-dns-update

Finally, check out status.log to make sure everything is working properly.