zonepop

ZonePop

Dynamic DNS for the lazy sysadmin.

What It Does

Inspired by ExternalDNS, ZonePop is a DNS syncing service that takes DHCP leases and IPv6 neighbors from any number of sources and syncs those to a DNS provider. No RFC 2136, client configuration, or complex split-horizon DNS resolver setup required (unless you feel like it, of course).

ZonePop is still in the early stages of development (and might be for a long time since it's just a single person maintaining it), so the number of sources and providers is limited for now.

Sources

• custom - Arbitrary Lua function
• vyos_ssh - VyOS DHCP leases fetched via SSH

Providers

• aws_route53 - Updates records in a AWS Route53 hosted zone
• custom - Arbitrary Lua function
• file - Generates a file (or multiple) using a Lua function or Golang template, optionally uploading to remote server via SSH
• hosts_file - Generates an /etc/hosts style file, optionally uploading to remote server via SSH
• http - Exposes a JSON list representation accessible via the /endpoints HTTP endpoint.
• prometheus_metrics - Exports info metrics for each endpoint in Prometheus format, accessible via the /metrics HTTP endpoint.

Configuration

The configuration file for ZonePop is a Lua script. Why Lua instead of YAML or similar? Lua allows for much more flexibility over how DNS records are created and managed.

A simple config file looks something like this:

return {
  sources = {
    vyos = {
      "vyos_ssh",
      config = {
        host = os.getenv("VYOS_HOST"),
        username = os.getenv("VYOS_USERNAME"),
        password = os.getenv("VYOS_PASSWORD"),
      },
    },
  },
  providers = {
    route53 = {
      "aws_route53",
      config = {
        record_suffix = ".example.com",
        forward_zone_id = "Z2FDTNDATAQYW2",
      },
    },
  },
}

The main config file should return a Table with the sources and providers keys. The keys for those sub-tables are simply logical names. The first value in each of those tables is the kind. For example, the Route53 provider uses the aws_route53 kind. The next key, config is the configuration for that source or provider. This will vary based on the source and provider (docs TBD).