85f549b529
* plugin/dnssec: add per server metrics final plugin. Fixes #1696 #1492 #1189 * Move cache cap into handler so we can access the server label * Remove cache-capacity from it entirely
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package dnssec
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/coredns/coredns/plugin"
|
|
"github.com/coredns/coredns/plugin/metrics"
|
|
"github.com/coredns/coredns/request"
|
|
|
|
"github.com/miekg/dns"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
// ServeDNS implements the plugin.Handler interface.
|
|
func (d Dnssec) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
|
|
state := request.Request{W: w, Req: r}
|
|
|
|
do := state.Do()
|
|
qname := state.Name()
|
|
qtype := state.QType()
|
|
zone := plugin.Zones(d.zones).Matches(qname)
|
|
if zone == "" {
|
|
return plugin.NextOrFailure(d.Name(), d.Next, ctx, w, r)
|
|
}
|
|
|
|
state.Zone = zone
|
|
server := metrics.WithServer(ctx)
|
|
|
|
// Intercept queries for DNSKEY, but only if one of the zones matches the qname, otherwise we let
|
|
// the query through.
|
|
if qtype == dns.TypeDNSKEY {
|
|
for _, z := range d.zones {
|
|
if qname == z {
|
|
resp := d.getDNSKEY(state, z, do, server)
|
|
resp.Authoritative = true
|
|
state.SizeAndDo(resp)
|
|
w.WriteMsg(resp)
|
|
return dns.RcodeSuccess, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
drr := &ResponseWriter{w, d, server}
|
|
return plugin.NextOrFailure(d.Name(), d.Next, ctx, drr, r)
|
|
}
|
|
|
|
var (
|
|
cacheSize = prometheus.NewGaugeVec(prometheus.GaugeOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "dnssec",
|
|
Name: "cache_size",
|
|
Help: "The number of elements in the dnssec cache.",
|
|
}, []string{"server", "type"})
|
|
|
|
cacheCapacity = prometheus.NewGaugeVec(prometheus.GaugeOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "dnssec",
|
|
Name: "cache_capacity",
|
|
Help: "The dnssec cache's capacity.",
|
|
}, []string{"server", "type"})
|
|
|
|
cacheHits = prometheus.NewCounterVec(prometheus.CounterOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "dnssec",
|
|
Name: "cache_hits_total",
|
|
Help: "The count of cache hits.",
|
|
}, []string{"server"})
|
|
|
|
cacheMisses = prometheus.NewCounterVec(prometheus.CounterOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "dnssec",
|
|
Name: "cache_misses_total",
|
|
Help: "The count of cache misses.",
|
|
}, []string{"server"})
|
|
)
|
|
|
|
// Name implements the Handler interface.
|
|
func (d Dnssec) Name() string { return "dnssec" }
|
|
|
|
var once sync.Once
|