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0d6e113f90
Add a NativeHistogramBucketFactor parameter to the use of `NewHistogramVec` in order to enable use of Prometheus Native Histograms. This will store automatically computed sparse buckets in CoreDNS. If a compatible Prometeus requests native histograms this data will returned instead of the static buckets. The default factor of 1.05 should provide high quality resolution data. Signed-off-by: SuperQ <superq@gmail.com>
93 lines
3.7 KiB
Go
93 lines
3.7 KiB
Go
package vars
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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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"github.com/prometheus/client_golang/prometheus/promauto"
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)
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// Request* and Response* are the prometheus counters and gauges we are using for exporting metrics.
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var (
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RequestCount = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "requests_total",
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Help: "Counter of DNS requests made per zone, protocol and family.",
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}, []string{"server", "zone", "view", "proto", "family", "type"})
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RequestDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "request_duration_seconds",
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Buckets: plugin.TimeBuckets,
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NativeHistogramBucketFactor: plugin.NativeHistogramBucketFactor,
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Help: "Histogram of the time (in seconds) each request took per zone.",
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}, []string{"server", "zone", "view"})
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RequestSize = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "request_size_bytes",
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Help: "Size of the EDNS0 UDP buffer in bytes (64K for TCP) per zone and protocol.",
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Buckets: []float64{0, 100, 200, 300, 400, 511, 1023, 2047, 4095, 8291, 16e3, 32e3, 48e3, 64e3},
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NativeHistogramBucketFactor: plugin.NativeHistogramBucketFactor,
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}, []string{"server", "zone", "view", "proto"})
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RequestDo = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "do_requests_total",
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Help: "Counter of DNS requests with DO bit set per zone.",
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}, []string{"server", "zone", "view"})
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ResponseSize = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "response_size_bytes",
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Help: "Size of the returned response in bytes.",
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Buckets: []float64{0, 100, 200, 300, 400, 511, 1023, 2047, 4095, 8291, 16e3, 32e3, 48e3, 64e3},
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NativeHistogramBucketFactor: plugin.NativeHistogramBucketFactor,
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}, []string{"server", "zone", "view", "proto"})
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ResponseRcode = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "responses_total",
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Help: "Counter of response status codes.",
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}, []string{"server", "zone", "view", "rcode", "plugin"})
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Panic = promauto.NewCounter(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Name: "panics_total",
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Help: "A metrics that counts the number of panics.",
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})
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PluginEnabled = promauto.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: plugin.Namespace,
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Name: "plugin_enabled",
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Help: "A metric that indicates whether a plugin is enabled on per server and zone basis.",
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}, []string{"server", "zone", "view", "name"})
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HTTPSResponsesCount = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "https_responses_total",
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Help: "Counter of DoH responses per server and http status code.",
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}, []string{"server", "status"})
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QUICResponsesCount = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: subsystem,
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Name: "quic_responses_total",
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Help: "Counter of DoQ responses per server and QUIC application code.",
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}, []string{"server", "status"})
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)
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const (
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subsystem = "dns"
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// Dropped indicates we dropped the query before any handling. It has no closing dot, so it can not be a valid zone.
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Dropped = "dropped"
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)
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