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plugin/metrics: Acknowledge other stats exported in README (#5172)

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* mention default go stats and other plugin stats in README

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
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Chris O'Haver 2022-02-09 13:52:18 -05:00 • committed by GitHub
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7
plugin/metrics/README.md
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@ -8,7 +8,9 @@
With *prometheus* you export metrics from CoreDNS and any plugin that has them.
The default location for the metrics is `localhost:9153`. The metrics path is fixed to `/metrics`.
The following metrics are exported:
In addition to the default Go metrics exported by the [Prometheus Go client](https://prometheus.io/docs/guides/go-application/),
the following metrics are exported:
* `coredns_build_info{version, revision, goversion}` - info about CoreDNS itself.
* `coredns_panics_total{}` - total number of panics.
@ -38,6 +40,9 @@ Extra labels used are:
If monitoring is enabled, queries that do not enter the plugin chain are exported under the fake
name "dropped" (without a closing dot - this is never a valid domain name).
Other plugins may export additional stats when the _prometheus_ plugin is enabled. Those stats are documented in each
plugin's README.
This plugin can only be used once per Server Block.
## Syntax