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219bfd0493
* middleware/metrics: add more metrics middleware/cache: Add metrics for number of elements in the cache. Also export the total size. Update README to detail the new metrics. middleware/metrics Move metrics into subpackage called "vars". This breaks the import cycle and is cleaner. This allows vars.Report to be used in the the dnsserver to log refused queries. middleware/metrics: tests Add tests to the metrics framework. The metrics/test subpackage allows scraping of the local server. Do a few test scrape of the metrics that are defined in the metrics middleware. This also allows metrics integration tests to check if the caching and dnssec middleware export their metrics correctly. * update README * typos * fix tests
69 lines
2.4 KiB
Go
69 lines
2.4 KiB
Go
package vars
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import (
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"github.com/miekg/coredns/middleware"
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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RequestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: middleware.Namespace,
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Subsystem: subsystem,
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Name: "request_count_total",
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Help: "Counter of DNS requests made per zone, protocol and family.",
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}, []string{"zone", "proto", "family"})
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RequestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: middleware.Namespace,
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Subsystem: subsystem,
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Name: "request_duration_milliseconds",
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Buckets: append(prometheus.DefBuckets, []float64{50, 100, 200, 500, 1000, 2000, 3000, 4000, 5000, 10000}...),
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Help: "Histogram of the time (in milliseconds) each request took.",
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}, []string{"zone"})
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RequestSize = prometheus.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: middleware.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).",
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Buckets: []float64{0, 100, 200, 300, 400, 511, 1023, 2047, 4095, 8291, 16e3, 32e3, 48e3, 64e3},
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}, []string{"zone", "proto"})
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RequestDo = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: middleware.Namespace,
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Subsystem: subsystem,
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Name: "request_do_count_total",
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Help: "Counter of DNS requests with DO bit set per zone.",
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}, []string{"zone"})
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RequestType = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: middleware.Namespace,
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Subsystem: subsystem,
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Name: "request_type_count_total",
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Help: "Counter of DNS requests per type, per zone.",
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}, []string{"zone", "type"})
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ResponseSize = prometheus.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: middleware.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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}, []string{"zone", "proto"})
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ResponseRcode = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: middleware.Namespace,
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Subsystem: subsystem,
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Name: "response_rcode_count_total",
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Help: "Counter of response status codes.",
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}, []string{"zone", "rcode"})
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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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