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introduce metric naming test (#3789)

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* introduce metric naming test

Signed-off-by: zounengren <zounengren@cmss.chinamobile.com>

* Update metrics.go

Signed-off-by: zounengren <zounengren@cmss.chinamobile.com>
This commit is contained in:
Zou Nengren
2020-03-31 14:07:36 +08:00
committed by GitHub
parent 10d176b811
commit 87214a4c5c
18 changed files with 297 additions and 97 deletions
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52
plugin/cache/metrics.go vendored Normal file
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package cache
import (
"github.com/coredns/coredns/plugin"
"github.com/prometheus/client_golang/prometheus"
)
var (
// cacheSize is total elements in the cache by cache type.
cacheSize = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: plugin.Namespace,
Subsystem: "cache",
Name: "size",
Help: "The number of elements in the cache.",
}, []string{"server", "type"})
// cacheHits is counter of cache hits by cache type.
cacheHits = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "cache",
Name: "hits_total",
Help: "The count of cache hits.",
}, []string{"server", "type"})
// cacheMisses is the counter of cache misses.
cacheMisses = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "cache",
Name: "misses_total",
Help: "The count of cache misses.",
}, []string{"server"})
// cachePrefetches is the number of time the cache has prefetched a cached item.
cachePrefetches = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "cache",
Name: "prefetch_total",
Help: "The number of time the cache has prefetched a cached item.",
}, []string{"server"})
// cacheDrops is the number responses that are not cached, because the reply is malformed.
cacheDrops = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "cache",
Name: "drops_total",
Help: "The number responses that are not cached, because the reply is malformed.",
}, []string{"server"})
// servedStale is the number of requests served from stale cache entries.
servedStale = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "cache",
Name: "served_stale_total",
Help: "The number of requests served from stale cache entries.",
}, []string{"server"})
)