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plugin/metrics: add 'server' label (#1682)

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* plugin/metrics: add 'server' label

This uses the new WithServer(ctx) to get the current server from the
context.

First in a larger refactor to make all plugins do this.

* compile

* compile

* lala test

* compile and test

* typos

* Dont duplicate the code
This commit is contained in:
Miek Gieben
2018-04-18 09:42:20 +01:00
committed by GitHub
parent 573ad62b77
commit 08443a9f00
10 changed files with 68 additions and 56 deletions
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17
plugin/metrics/README.md
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@@ -11,18 +11,21 @@ The default location for the metrics is `localhost:9153`. The metrics path is fi
The following metrics are exported:
* `coredns_build_info{version, revision, goversion}` - info about CoreDNS itself.
* `coredns_dns_request_count_total{zone, proto, family}` - total query count.
* `coredns_dns_request_duration_seconds{zone}` - duration to process each query.
* `coredns_dns_request_size_bytes{zone, proto}` - size of the request in bytes.
* `coredns_dns_request_do_count_total{zone}` - queries that have the DO bit set
* `coredns_dns_request_type_count_total{zone, type}` - counter of queries per zone and type.
* `coredns_dns_response_size_bytes{zone, proto}` - response size in bytes.
* `coredns_dns_response_rcode_count_total{zone, rcode}` - response per zone and rcode.
* `coredns_dns_request_count_total{server, zone, proto, family}` - total query count.
* `coredns_dns_request_duration_seconds{server, zone}` - duration to process each query.
* `coredns_dns_request_size_bytes{server, zone, proto}` - size of the request in bytes.
* `coredns_dns_request_do_count_total{server, zone}` - queries that have the DO bit set
* `coredns_dns_request_type_count_total{server, zone, type}` - counter of queries per zone and type.
* `coredns_dns_response_size_bytes{server, zone, proto}` - response size in bytes.
* `coredns_dns_response_rcode_count_total{server, zone, rcode}` - response per zone and rcode.
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,