4083852b70
Prevent future; "remove trailing whitespace" PR, but adding a simple presubmit that checks for this. This presubmit flagged quite some offenders, remove all trailing whitespace from. Apart from that there aren't any other changes. Signed-off-by: Miek Gieben <miek@miek.nl>
58 lines
1.5 KiB
Markdown
58 lines
1.5 KiB
Markdown
# whoami
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## Name
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*whoami* - returns your resolver's local IP address, port and transport.
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## Description
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The *whoami* plugin is not really that useful, but can be used for having a simple (fast) endpoint
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to test clients against. When *whoami* returns a response it will have your client's IP address in
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the additional section as either an A or AAAA record.
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The reply always has an empty answer section. The port and transport are included in the additional
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section as a SRV record, transport can be "tcp" or "udp".
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~~~ txt
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._<transport>.qname. 0 IN SRV 0 0 <port> .
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~~~
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The *whoami* plugin will respond to every A or AAAA query, regardless of the query name.
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If CoreDNS can't find a Corefile on startup this is the _default_ plugin that gets loaded. As such
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it can be used to check that CoreDNS is responding to queries. Other than that this plugin is of
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limited use in production.
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## Syntax
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~~~ txt
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whoami
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~~~
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## Examples
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Start a server on the default port and load the *whoami* plugin.
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~~~ corefile
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. {
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whoami
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}
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~~~
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When queried for "example.org A", CoreDNS will respond with:
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~~~ txt
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;; QUESTION SECTION:
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;example.org. IN A
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;; ADDITIONAL SECTION:
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example.org. 0 IN A 10.240.0.1
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_udp.example.org. 0 IN SRV 0 0 40212
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~~~
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## See Also
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[Read the blog post][blog] on how this plugin is built, or [explore the source code][code].
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[blog]: https://coredns.io/2017/03/01/how-to-add-plugins-to-coredns/
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[code]: https://github.com/coredns/coredns/blob/master/plugin/whoami/
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