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Add metrics for cache hits/misses (#375)

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* Add metrics for cache hits/misses

Add counters for cache middleware hits and misses.

* Add test for cache middleware hit/miss counters.

* Fix cache hit metric incrementing.

* Add cache hit/miss metrics to dnssec middleware.

* Update README metric documentation.
This commit is contained in:
Ben Kochie
2016-10-31 19:50:50 +01:00
committed by Miek Gieben
parent 27d893cf33
commit 775d26c5e2
6 changed files with 63 additions and 6 deletions
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8
middleware/cache/README.md vendored
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@@ -39,8 +39,12 @@ The minimum TTL allowed on resource records is 5 seconds.
If monitoring is enabled (via the *prometheus* directive) then the following metrics are exported:
* coredns_cache_size{type} - total elements in the case, type is either "denial" or "success".
* coredns_cache_capacity{type} - total capacity of the cache, type is either "denial" or "success".
* coredns_cache_size{type} - Total elements in the cache by cache type.
* coredns_cache_capacity{type} - Total capacity of the cache by cache type.
* coredns_cache_hits_total{type} - Counter of cache hits by cache type.
* coredns_cache_misses_total - Counter of cache misses.
Cache types are either "denial" or "success".
## Examples