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81 lines
1.9 KiB
Markdown
81 lines
1.9 KiB
Markdown
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# example
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## Name
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*example* - prints "example" after a query is handled.
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## Description
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The example plugin prints "example" on every query that got handled by the server. It serves as
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documentation for writing CoreDNS plugins.
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## Compilation
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This package will always be compiled as part of CoreDNS and not in a standalone way. It will require you to use `go get` or as a dependency on [plugin.cfg](https://github.com/coredns/coredns/blob/master/plugin.cfg).
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The [manual](https://coredns.io/manual/toc/#what-is-coredns) will have more information about how to configure and extend the server with external plugins.
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A simple way to consume this plugin, is by adding the following on [plugin.cfg](https://github.com/coredns/coredns/blob/master/plugin.cfg), and recompile it as [detailed on coredns.io](https://coredns.io/2017/07/25/compile-time-enabling-or-disabling-plugins/#build-with-compile-time-configuration-file).
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~~~
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example:github.com/coredns/example
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~~~
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Put this early in the plugin list, so that *example* is executed before any of the other plugins.
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After this you can compile coredns by:
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``` sh
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go generate
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go build
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```
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Or you can instead use make:
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``` sh
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make
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```
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## Syntax
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~~~ txt
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example
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~~~
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## Metrics
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If monitoring is enabled (via the *prometheus* directive) the following metric is exported:
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* `coredns_example_request_count_total{server}` - query count to the *example* plugin.
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The `server` label indicated which server handled the request, see the *metrics* plugin for details.
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## Ready
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This plugin reports readiness to the ready plugin. It will be immediately ready.
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## Examples
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In this configuration, we forward all queries to 9.9.9.9 and print "example" whenever we receive
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a query.
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~~~ corefile
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. {
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forward . 9.9.9.9
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example
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}
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~~~
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Or without any external connectivity:
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~~~ corefile
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. {
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whoami
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example
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}
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~~~
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## Also See
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See the [manual](https://coredns.io/manual).
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