35 lines
964 B
Go
35 lines
964 B
Go
package metrics
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import (
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"time"
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"golang.org/x/net/context"
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/dns"
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)
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func (m Metrics) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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state := middleware.State{W: w, Req: r}
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qname := state.Name()
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qtype := state.Type()
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zone := middleware.Zones(m.ZoneNames).Matches(qname)
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if zone == "" {
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zone = "."
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}
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// Record response to get status code and size of the reply.
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rw := middleware.NewResponseRecorder(w)
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status, err := m.Next.ServeDNS(ctx, rw, r)
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m.Report(zone, qtype, rw)
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return status, err
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}
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func (m Metrics) Report(zone, qtype string, rw *middleware.ResponseRecorder) {
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requestCount.WithLabelValues(zone, qtype).Inc()
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requestDuration.WithLabelValues(zone, qtype).Observe(float64(time.Since(rw.Start()) / time.Second))
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responseSize.WithLabelValues(zone, qtype).Observe(float64(rw.Size()))
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responseRcode.WithLabelValues(zone, rw.Rcode(), qtype).Inc()
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}
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