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552aab723c
* Configurable zone reload interval in file plugin * passing reload config from auto plugin to file plugin. removed noReload property from Zone struct. fixed tests based on short file reload hack
82 lines
2.9 KiB
Markdown
82 lines
2.9 KiB
Markdown
# auto
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## Name
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*auto* - enables serving zone data from an RFC 1035-style master file, which is automatically picked up from disk.
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## Description
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The *auto* plugin is used for an "old-style" DNS server. It serves from a preloaded file that exists
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on disk. If the zone file contains signatures (i.e. is signed, i.e. using DNSSEC) correct DNSSEC answers
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are returned. Only NSEC is supported! If you use this setup *you* are responsible for re-signing the
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zonefile. New or changed zones are automatically picked up from disk.
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## Syntax
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~~~
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auto [ZONES...] {
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directory DIR [REGEXP ORIGIN_TEMPLATE [TIMEOUT]]
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reload DURATION
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no_reload
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upstream [ADDRESS...]
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}
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~~~
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**ZONES** zones it should be authoritative for. If empty, the zones from the configuration block
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are used.
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* `directory` loads zones from the specified **DIR**. If a file name matches **REGEXP** it will be
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used to extract the origin. **ORIGIN_TEMPLATE** will be used as a template for the origin. Strings
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like `{<number>}` are replaced with the respective matches in the file name, e.g. `{1}` is the
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first match, `{2}` is the second. The default is: `db\.(.*) {1}` i.e. from a file with the
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name `db.example.com`, the extracted origin will be `example.com`. **TIMEOUT** specifies how often
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CoreDNS should scan the directory; the default is every 60 seconds. This value is in seconds.
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The minimum value is 1 second.
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* `reload` interval to perform reload of zone if SOA version changes. Default is one minute.
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Value of `0` means to not scan for changes and reload. eg. `30s` checks zonefile every 30 seconds
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and reloads zone when serial changes.
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* `no_reload` deprecated. Sets reload to 0.
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* `upstream` defines upstream resolvers to be used resolve external names found (think CNAMEs)
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pointing to external names. **ADDRESS** can be an IP address, an IP:port or a string pointing to
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a file that is structured as /etc/resolv.conf. If no **ADDRESS** is given, CoreDNS will resolve CNAMEs
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against itself.
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All directives from the *file* plugin are supported. Note that *auto* will load all zones found,
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even though the directive might only receive queries for a specific zone. I.e:
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~~~ corefile
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. {
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auto example.org {
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directory /etc/coredns/zones
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}
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}
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~~~
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Will happily pick up a zone for `example.COM`, except it will never be queried, because the *auto*
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directive only is authoritative for `example.ORG`.
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## Examples
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Load `org` domains from `/etc/coredns/zones/org` and allow transfers to the internet, but send
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notifies to 10.240.1.1
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~~~ corefile
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. {
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auto org {
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directory /etc/coredns/zones/org
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transfer to *
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transfer to 10.240.1.1
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}
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}
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~~~
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Load `org` domains from `/etc/coredns/zones/org` and looks for file names as `www.db.example.org`,
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where `example.org` is the origin. Scan every 45 seconds.
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~~~ corefile
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org {
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auto {
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directory /etc/coredns/zones/org www\.db\.(.*) {1} 45
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}
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}
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~~~
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