What is better than a [Pi-hole](https://github.com/pi-hole/pi-hole) blocking ads via DNS on your network? That's right, two Pi-hole blocking ads on your network! But if you have more than one Pi-hole in your network you'll want a simple way to keep the list configurations and local DNS settings identical between the two. That's Gravity Sync. With proper preparation it should only take a few minutes to install. Ideally you set up Gravity Sync and forget about it -- and in the long term, it would be awesome if the Pi-hole team made this entire script unnecessary. ## Features Gravity Sync the `gravity.db` database which includes: - Blocklist settings with status and comments. - Domain whitelist and blacklist along with status with comments. - Custom RegEx whitelist and blacklists. - Clients and groups along with any list assignments. - The Local DNS Settings feature in Pi-hole (These are stored in a separate `custom.list` file and this can optionally be disabled.) ### Limitations Gravity Sync will **not**: - Overwrite or sync device specific Pi-hole settings such as the local network configuration. - Overwrite or sync the Pi-hole admin/API passwords, nor does not leverage these at all. - Overwrite or sync the upstream DNS resolvers, etc. - Overwrite or sync DHCP settings or device leases synchronized. - Overwrite or sync long term data, query logs, or statistics. ### Disclaimer Gravity Sync is not developed by or affiliated with the Pi-hole project. This is an effort that seeks to implement replication, which is currently not a part of the core Pi-hole product. The code has been tested across multiple user environments but there always is an element of risk involved with running any arbitrary software you find on the Internet. ## Setup Steps 1. [Review System Requirements](https://github.com/vmstan/gravity-sync/wiki/System-Requirements) 2. [Prepare Your Pi-hole](https://github.com/vmstan/gravity-sync/wiki/Installing#primary-pi-hole) 3. [Install Gravity Sync](https://github.com/vmstan/gravity-sync/wiki/Installing#secondary-pi-hole) 4. [Configure Gravity Sync](https://github.com/vmstan/gravity-sync/wiki/Installing#configuration) 5. [Execute Gravity Sync](https://github.com/vmstan/gravity-sync/wiki/Installing#execution) 6. [Automate Gravity Sync](https://github.com/vmstan/gravity-sync/wiki/Installing#automation) 7. [Profit](https://memory-alpha.fandom.com/wiki/Rules_of_Acquisition) # Additional Documentation Please refer to the [Wiki](https://github.com/vmstan/gravity-sync/wiki) for more information: - [Frequently Asked Questions](https://github.com/vmstan/gravity-sync/wiki/Frequent-Questions) - [Advanced Installation Options](https://github.com/vmstan/gravity-sync/wiki/Under-The-Covers) - [Changelog](https://github.com/vmstan/gravity-sync/blob/master/CHANGELOG.md)