d1f17fa7e0
Move all (almost all) Go files in middleware into their own packages. This makes for better naming and discoverability. Lot of changes elsewhere to make this change. The middleware.State was renamed to request.Request which is better, but still does not cover all use-cases. It was also moved out middleware because it is used by `dnsserver` as well. A pkg/dnsutil packages was added for shared, handy, dns util functions. All normalize functions are now put in normalize.go
95 lines
2.3 KiB
Go
95 lines
2.3 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/coredns/middleware/pkg/dnsrecorder"
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"github.com/miekg/coredns/middleware/pkg/rcode"
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"github.com/miekg/coredns/request"
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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 := request.Request{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 := dnsrecorder.New(w)
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status, err := m.Next.ServeDNS(ctx, rw, r)
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Report(state, zone, rcode.ToString(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(req request.Request, 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 := req.Proto()
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fam := "1"
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if req.Family() == 2 {
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fam = "2"
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}
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typ := req.QType()
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requestCount.WithLabelValues(zone, net, fam).Inc()
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requestDuration.WithLabelValues(zone).Observe(float64(time.Since(start) / time.Millisecond))
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if req.Do() {
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requestDo.WithLabelValues(zone).Inc()
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}
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if _, known := monitorType[typ]; known {
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requestType.WithLabelValues(zone, dns.Type(typ).String()).Inc()
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} else {
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requestType.WithLabelValues(zone, other).Inc()
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}
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if typ == dns.TypeIXFR || typ == dns.TypeAXFR {
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responseTransferSize.WithLabelValues(zone, net).Observe(float64(size))
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requestTransferSize.WithLabelValues(zone, net).Observe(float64(req.Size()))
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} else {
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responseSize.WithLabelValues(zone, net).Observe(float64(size))
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requestSize.WithLabelValues(zone, net).Observe(float64(req.Size()))
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}
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responseRcode.WithLabelValues(zone, rcode).Inc()
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}
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var monitorType = map[uint16]bool{
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dns.TypeAAAA: true,
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dns.TypeA: true,
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dns.TypeCNAME: true,
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dns.TypeDNSKEY: true,
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dns.TypeDS: true,
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dns.TypeMX: true,
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dns.TypeNSEC3: true,
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dns.TypeNSEC: true,
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dns.TypeNS: true,
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dns.TypePTR: true,
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dns.TypeRRSIG: true,
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dns.TypeSOA: true,
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dns.TypeSRV: true,
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dns.TypeTXT: true,
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// Meta Qtypes
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dns.TypeIXFR: true,
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dns.TypeAXFR: true,
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dns.TypeANY: true,
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}
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const other = "other"
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