mirror of
https://github.com/coredns/coredns.git
synced 2025-11-03 18:53:13 -05:00
21e9c6047b
* log: use ioutil.Discard as write buffer in benchmark Using a buffer gives unrealistic stats and consumes a large amount of memory. * log: lazily check if a msg should be logged * log: improve variable name Change 'ok' to the more descriptive 'shouldLog'. * log: code comments: don't reuse variable
76 lines
2.0 KiB
Go
76 lines
2.0 KiB
Go
// Package log implements basic but useful request (access) logging plugin.
|
|
package log
|
|
|
|
import (
|
|
"context"
|
|
"time"
|
|
|
|
"github.com/coredns/coredns/plugin"
|
|
"github.com/coredns/coredns/plugin/pkg/dnstest"
|
|
clog "github.com/coredns/coredns/plugin/pkg/log"
|
|
"github.com/coredns/coredns/plugin/pkg/replacer"
|
|
"github.com/coredns/coredns/plugin/pkg/response"
|
|
"github.com/coredns/coredns/request"
|
|
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// Logger is a basic request logging plugin.
|
|
type Logger struct {
|
|
Next plugin.Handler
|
|
Rules []Rule
|
|
|
|
repl replacer.Replacer
|
|
}
|
|
|
|
// ServeDNS implements the plugin.Handler interface.
|
|
func (l Logger) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
|
|
state := request.Request{W: w, Req: r}
|
|
name := state.Name()
|
|
for _, rule := range l.Rules {
|
|
if !plugin.Name(rule.NameScope).Matches(name) {
|
|
continue
|
|
}
|
|
|
|
rrw := dnstest.NewRecorder(w)
|
|
rc, err := plugin.NextOrFailure(l.Name(), l.Next, ctx, rrw, r)
|
|
|
|
// If we don't set up a class in config, the default "all" will be added
|
|
// and we shouldn't have an empty rule.Class.
|
|
_, ok := rule.Class[response.All]
|
|
var ok1 bool
|
|
if !ok {
|
|
tpe, _ := response.Typify(rrw.Msg, time.Now().UTC())
|
|
class := response.Classify(tpe)
|
|
_, ok1 = rule.Class[class]
|
|
}
|
|
if ok || ok1 {
|
|
logstr := l.repl.Replace(ctx, state, rrw, rule.Format)
|
|
clog.Infof(logstr)
|
|
}
|
|
|
|
return rc, err
|
|
|
|
}
|
|
return plugin.NextOrFailure(l.Name(), l.Next, ctx, w, r)
|
|
}
|
|
|
|
// Name implements the Handler interface.
|
|
func (l Logger) Name() string { return "log" }
|
|
|
|
// Rule configures the logging plugin.
|
|
type Rule struct {
|
|
NameScope string
|
|
Class map[response.Class]struct{}
|
|
Format string
|
|
}
|
|
|
|
const (
|
|
// CommonLogFormat is the common log format.
|
|
CommonLogFormat = `{remote}:{port} ` + replacer.EmptyValue + ` {>id} "{type} {class} {name} {proto} {size} {>do} {>bufsize}" {rcode} {>rflags} {rsize} {duration}`
|
|
// CombinedLogFormat is the combined log format.
|
|
CombinedLogFormat = CommonLogFormat + ` "{>opcode}"`
|
|
// DefaultLogFormat is the default log format.
|
|
DefaultLogFormat = CommonLogFormat
|
|
)
|