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plugin/hosts provide more configuration flexibility (#2535)

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* plugin/hosts provide more configuration flexibility

This patch adds few features to the host plugin
 * no-reverse (both as first argument on the plugin line and inline)
   disable the automatic generation of reserve entries for hosts
 * ttl <duration> (inline only atm)
   allows to change the default ttl (default 5 minutes)
 * reload <duration> (inline only atm)
   allows to change the reloading interval (default 5s)

* plugin/hosts remove superfluous parameters to parse
This commit is contained in:
Thomas Mangin
2019-02-12 16:09:33 +00:00
committed by Pat Moroney
parent e47d881461
commit 4b402e000d
6 changed files with 163 additions and 70 deletions
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6
plugin/hosts/README.md
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@@ -41,6 +41,9 @@ PTR records for reverse lookups are generated automatically by CoreDNS (based on
~~~
hosts [FILE [ZONES...]] {
[INLINE]
ttl SECONDS
no_reverse
reload DURATION
fallthrough [ZONES...]
}
~~~
@@ -53,6 +56,9 @@ hosts [FILE [ZONES...]] {
* **INLINE** the hosts file contents inlined in Corefile. If there are any lines before fallthrough
then all of them will be treated as the additional content for hosts file. The specified hosts
file path will still be read but entries will be overrided.
* `ttl` change the DNS TTL of the records generated (forward and reverse). The default is 3600 seonds (1 hour).
* `reload` change the period between each hostsfile reload. A time of zero seconds disable the feature. Examples of valid durations: "300ms", "1.5h" or "2h45m" are valid duration with units "ns" (nanosecond), "us" (or "µs" for microsecond), "ms" (millisecond), "s" (second), "m" (minute), "h" (hour).
* `no_reverse` disable the automatic generation of the the `in-addr.arpa` or `ip6.arpa` entries for the hosts
* `fallthrough` If zone matches and no record can be generated, pass request to the next plugin.
If **[ZONES...]** is omitted, then fallthrough happens for all zones for which the plugin
is authoritative. If specific zones are listed (for example `in-addr.arpa` and `ip6.arpa`), then only