NAME

DESCRIPTION

• coredns_build_info{version, revision, goversion} - info about CoreDNS itself.
• coredns_panics_total{} - total number of panics.
• coredns_dns_requests_total{server, zone, proto, family, type} - total query count.
• coredns_dns_request_duration_seconds{server, zone, type} - duration to process each query.
• coredns_dns_request_size_bytes{server, zone, proto} - size of the request in bytes.
• coredns_dns_do_requests_total{server, zone} - queries that have the DO bit set
• coredns_dns_response_size_bytes{server, zone, proto} - response size in bytes.
• coredns_dns_responses_total{server, zone, rcode} - response per zone and rcode.
• coredns_plugin_enabled{server, zone, name} - indicates whether a plugin is enabled on per server and zone basis.

Each counter has a label zone which is the zonename used for the request/response.

Extra labels used are:

• server is identifying the server responsible for the request. This is a string formatted as the server's listening address: <scheme>://[<bind>]:<port>. I.e. for a "normal" DNS server this is dns://:53. If you are using the bind plugin an IP address is included, e.g.: dns://127.0.0.53:53.
• proto which holds the transport of the response ("udp" or "tcp")
• The address family (family) of the transport (1 = IP (IP version 4), 2 = IP6 (IP version 6)).
• type which holds the query type. It holds most common types (A, AAAA, MX, SOA, CNAME, PTR, TXT, NS, SRV, DS, DNSKEY, RRSIG, NSEC, NSEC3, IXFR, AXFR and ANY) and "other" which lumps together all other types.

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).

This plugin can only be used once per Server Block.

SYNTAX

prometheus [ADDRESS]

For each zone that you want to see metrics for.

It optionally takes a bind address to which the metrics are exported; the default listens on localhost:9153. The metrics path is fixed to /metrics.

EXAMPLES

. {
    prometheus localhost:9253
}

Or via an environment variable (this is supported throughout the Corefile): export PORT=9253, and then:

. {
    prometheus localhost:{$PORT}
}

BUGS