coredns/middleware/file/README.md

file

file enables serving zone data from a RFC-1035 styled file.

The file middleware is used for "old-style" DNS server. It serves from a preloaded file that exists on disk.

Syntax

file dbfile [zones...]

• dbfile the database file to read and parse.
• zones zones it should be authoritative for. If empty the zones from the configuration block are used.

If you want to round robin A and AAAA responses look at the loadbalance middleware.

TSIG key configuration is TODO; directive format for transfer will probably be extended with TSIG key information, something like transfer out [address...] key [name] [base64]

file dbfile [zones... ] {
    transfer from [address...]
    transfer to [address...]
    no_reload
}

• transfer enables zone transfers. It may be specified multiples times. To or from signals the direction. Addresses must be denoted in CIDR notation (127.0.0.1/32 etc.) or just as plain address. The special wildcard "*" means: the entire internet (only valid for 'transfer to').
• no_reload by default CoreDNS will reload a zone from disk whenever it detects a change to the file. This option disables that behavior.

Examples

Load the miek.nl zone from miek.nl.signed and allow transfers to the internet.

file miek.nl.signed miek.nl {
    transfer to *
}