120 lines
2.8 KiB
Go
120 lines
2.8 KiB
Go
// Copyright 2015 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// +build !windows,!nacl,!plan9
|
|
|
|
package log
|
|
|
|
import (
|
|
"fmt"
|
|
"log/syslog"
|
|
"os"
|
|
|
|
"github.com/Sirupsen/logrus"
|
|
)
|
|
|
|
func init() {
|
|
setSyslogFormatter = func(appname, local string) error {
|
|
if appname == "" {
|
|
return fmt.Errorf("missing appname parameter")
|
|
}
|
|
if local == "" {
|
|
return fmt.Errorf("missing local parameter")
|
|
}
|
|
|
|
fmter, err := newSyslogger(appname, local, origLogger.Formatter)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "error creating syslog formatter: %v\n", err)
|
|
origLogger.Errorf("can't connect logger to syslog: %v", err)
|
|
return err
|
|
}
|
|
origLogger.Formatter = fmter
|
|
return nil
|
|
}
|
|
}
|
|
|
|
var ceeTag = []byte("@cee:")
|
|
|
|
type syslogger struct {
|
|
wrap logrus.Formatter
|
|
out *syslog.Writer
|
|
}
|
|
|
|
func newSyslogger(appname string, facility string, fmter logrus.Formatter) (*syslogger, error) {
|
|
priority, err := getFacility(facility)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
out, err := syslog.New(priority, appname)
|
|
return &syslogger{
|
|
out: out,
|
|
wrap: fmter,
|
|
}, err
|
|
}
|
|
|
|
func getFacility(facility string) (syslog.Priority, error) {
|
|
switch facility {
|
|
case "0":
|
|
return syslog.LOG_LOCAL0, nil
|
|
case "1":
|
|
return syslog.LOG_LOCAL1, nil
|
|
case "2":
|
|
return syslog.LOG_LOCAL2, nil
|
|
case "3":
|
|
return syslog.LOG_LOCAL3, nil
|
|
case "4":
|
|
return syslog.LOG_LOCAL4, nil
|
|
case "5":
|
|
return syslog.LOG_LOCAL5, nil
|
|
case "6":
|
|
return syslog.LOG_LOCAL6, nil
|
|
case "7":
|
|
return syslog.LOG_LOCAL7, nil
|
|
}
|
|
return syslog.LOG_LOCAL0, fmt.Errorf("invalid local(%s) for syslog", facility)
|
|
}
|
|
|
|
func (s *syslogger) Format(e *logrus.Entry) ([]byte, error) {
|
|
data, err := s.wrap.Format(e)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "syslogger: can't format entry: %v\n", err)
|
|
return data, err
|
|
}
|
|
// only append tag to data sent to syslog (line), not to what
|
|
// is returned
|
|
line := string(append(ceeTag, data...))
|
|
|
|
switch e.Level {
|
|
case logrus.PanicLevel:
|
|
err = s.out.Crit(line)
|
|
case logrus.FatalLevel:
|
|
err = s.out.Crit(line)
|
|
case logrus.ErrorLevel:
|
|
err = s.out.Err(line)
|
|
case logrus.WarnLevel:
|
|
err = s.out.Warning(line)
|
|
case logrus.InfoLevel:
|
|
err = s.out.Info(line)
|
|
case logrus.DebugLevel:
|
|
err = s.out.Debug(line)
|
|
default:
|
|
err = s.out.Notice(line)
|
|
}
|
|
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "syslogger: can't send log to syslog: %v\n", err)
|
|
}
|
|
|
|
return data, err
|
|
}
|