53 lines
1.9 KiB
Go
53 lines
1.9 KiB
Go
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package cache
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import (
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"github.com/coredns/coredns/plugin"
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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// cacheSize is total elements in the cache by cache type.
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cacheSize = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: plugin.Namespace,
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Subsystem: "cache",
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Name: "entries",
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Help: "The number of elements in the cache.",
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}, []string{"server", "type"})
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// cacheHits is counter of cache hits by cache type.
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cacheHits = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "cache",
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Name: "hits_total",
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Help: "The count of cache hits.",
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}, []string{"server", "type"})
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// cacheMisses is the counter of cache misses.
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cacheMisses = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "cache",
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Name: "misses_total",
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Help: "The count of cache misses.",
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}, []string{"server"})
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// cachePrefetches is the number of time the cache has prefetched a cached item.
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cachePrefetches = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "cache",
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Name: "prefetch_total",
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Help: "The number of time the cache has prefetched a cached item.",
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}, []string{"server"})
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// cacheDrops is the number responses that are not cached, because the reply is malformed.
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cacheDrops = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "cache",
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Name: "drops_total",
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Help: "The number responses that are not cached, because the reply is malformed.",
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}, []string{"server"})
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// servedStale is the number of requests served from stale cache entries.
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servedStale = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "cache",
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Name: "served_stale_total",
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Help: "The number of requests served from stale cache entries.",
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}, []string{"server"})
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)
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