This is a simple script intended to be used on a Pi-hole that listens on Tailscale. I found it annoying to constantly update the /etc/hosts file on my Pi-hole every time I added or removed a device from my Tailnet. This script uses the tailscale status command and updates the hosts file of the Pi-hole with the IPv4 and IPv6 IPs of each device and their MagicDNS names.
| Variable | Usage | Default |
|---|---|---|
| HOSTS_FILE | The path to the hosts file | '/etc/hosts' |
| START_MARKER | A comment in the hosts file to tell the script where to insert the tailscale hosts | '# Tailscale Start' |
| END_MARKER | The end of the tailscale IPs block | '# Tailscale End' |
You must add two lines to the hosts file for the script to work:
...
<START_MARKER>
<END_MARKER>
By default, this should be:
...
# Tailscale Start
# Tailscale End
All of the dynamically added hosts will be between these two comments.
The script must be run with root privilege as the hosts file is owned by root. Create a cron job to run this script so that it will update consistantly. I have mine set to run every hour.