This is a small tool to enable the systemd-networkd service as well as resolvectl to enable per-interface DNS settings. We take this directly from zerotier-one (on your machine) metadata. This service does not reach out to the internet on its own.

The result is per-interface DNS settings, which is especially nice when you are using zeronsd with multiple networks.

Usage

Make sure your distro supports systemd-networkd and that it is enabled and started

Check out our releases for debian and redhat packages that automate this on a variety of platforms.

Installing From Source

Compile it with golang 1.16 or later:

# be outside of gopath when you do this
go get github.com/zerotier/zerotier-systemd-manager

Ensure systemd-networkd is properly configured and resolvectl works as intended. Additionally, make sure to have a /etc/hosts file that allows to locally resolve localhost e.g containing at least:

127.0.0.1        localhost
::1              localhost

Finally, run the tool as root: zerotier-systemd-manager. If you have interfaces with DNS assignments in ZeroTier, it will populate files in /etc/systemd/network. No DNS assignment, no file. Unless you have passed -auto-restart=false, it will restart systemd-networkd for you if things have changed.

If you have a DNS-over-TLS configuration provided by zeronsd (v0.4.0 or later), you can enable using it by providing -dns-over-tls=true in the supervisor (a systemd timer in the default case). You will have to hand-edit this in for now.

If you want to enable multicast DNS / bonjour / mDNS you can enable it by providing -multicast-dns.

Finally, if you have left a DNS-controlled network it will try to remove the old files if -reconcile=true is set (the default). This way you can stuff it in cron and not think about it too much.

Enjoy!

Author

Erik Hollensbe github@hollensbe.org

License

BSD 3-Clause

Releasing

This repo uses goreleaser.