54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package metrics
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import (
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"time"
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/dns"
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"golang.org/x/net/context"
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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.QName()
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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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Report(state, zone, rw.Rcode(), rw.Size(), rw.Start())
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return status, err
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}
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// Report is a plain reporting function that the server can use for REFUSED and other
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// queries that are turned down because they don't match any middleware.
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func Report(state middleware.State, zone, rcode string, size int, start time.Time) {
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if requestCount == nil {
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// no metrics are enabled
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return
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}
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// Proto and Family
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net := state.Proto()
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fam := "1"
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if state.Family() == 2 {
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fam = "2"
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}
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requestCount.WithLabelValues(zone, net, fam).Inc()
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requestDuration.WithLabelValues(zone).Observe(float64(time.Since(start) / time.Second))
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requestSize.WithLabelValues(zone, net).Observe(float64(state.Size()))
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if state.Do() {
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requestDo.WithLabelValues(zone).Inc()
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}
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responseSize.WithLabelValues(zone, net).Observe(float64(size))
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responseRcode.WithLabelValues(zone, rcode).Inc()
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}
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