1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
package metrics
import (
"time"
"github.com/miekg/coredns/middleware"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
func (m Metrics) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
state := middleware.State{W: w, Req: r}
qname := state.QName()
zone := middleware.Zones(m.ZoneNames).Matches(qname)
if zone == "" {
zone = "."
}
// Record response to get status code and size of the reply.
rw := middleware.NewResponseRecorder(w)
status, err := m.Next.ServeDNS(ctx, rw, r)
Report(state, zone, rw.Rcode(), rw.Size(), rw.Start())
return status, err
}
// Report is a plain reporting function that the server can use for REFUSED and other
// queries that are turned down because they don't match any middleware.
func Report(state middleware.State, zone, rcode string, size int, start time.Time) {
if requestCount == nil {
// no metrics are enabled
return
}
// Proto and Family
net := state.Proto()
fam := "1"
if state.Family() == 2 {
fam = "2"
}
requestCount.WithLabelValues(zone, net, fam).Inc()
requestDuration.WithLabelValues(zone).Observe(float64(time.Since(start) / time.Second))
requestSize.WithLabelValues(zone, net).Observe(float64(state.Size()))
if state.Do() {
requestDo.WithLabelValues(zone).Inc()
}
typ := state.QType()
if _, known := monitorType[typ]; known {
requestType.WithLabelValues(zone, dns.Type(typ).String()).Inc()
} else {
requestType.WithLabelValues(zone, other).Inc()
}
responseSize.WithLabelValues(zone, net).Observe(float64(size))
responseRcode.WithLabelValues(zone, rcode).Inc()
}
var monitorType = map[uint16]bool{
dns.TypeAAAA: true,
dns.TypeA: true,
dns.TypeCNAME: true,
dns.TypeDNSKEY: true,
dns.TypeDS: true,
dns.TypeMX: true,
dns.TypeNSEC3: true,
dns.TypeNSEC: true,
dns.TypeNS: true,
dns.TypePTR: true,
dns.TypeRRSIG: true,
dns.TypeSOA: true,
dns.TypeSRV: true,
dns.TypeTXT: true,
}
const other = "other"
|
