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# prometheus
This module enables prometheus metrics for CoreDNS.
The following metrics are exported:
* coredns_dns_request_count_total
* coredns_dns_request_duration_seconds
* coredns_dns_response_size_bytes
* coredns_dns_response_rcode_count_total
Each counter has a label `zone` which is the zonename used for the request/response.
The `request_count` metrics has an extra label `qtype` which holds the qtype. And
`rcode_count` has an extra label which has the rcode.
Restarting CoreDNS will stop the monitoring. This is a bug. Also [this upstream
Caddy bug](https://github.com/mholt/caddy/issues/675).
## Syntax
~~~
prometheus
~~~
For each zone that you want to see metrics for.
It optionally takes an address where the metrics are exported, the default
is `localhost:9154`. The metrics path is fixed to `/metrics`.
## Examples
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