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minio/cmd/logger-syslog-hook_nix.go

83 lines
2.2 KiB

// +build !windows
/*
* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
*
* 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.
*/
package cmd
import (
"fmt"
"log/syslog"
"github.com/Sirupsen/logrus"
)
type syslogLogger struct {
Enable bool `json:"enable"`
Addr string `json:"address"`
Level string `json:"level"`
}
// syslogHook to send logs via syslog.
type syslogHook struct {
writer *syslog.Writer
syslogNetwork string
syslogRaddr string
}
// enableSyslogLogger - enable logger at raddr.
func enableSyslogLogger(raddr string) {
syslogHook, err := newSyslog("udp", raddr, syslog.LOG_ERR, "MINIO")
fatalIf(err, "Unable to initialize syslog logger.")
log.Hooks.Add(syslogHook) // Add syslog hook.
log.Formatter = &logrus.JSONFormatter{} // JSON formatted log.
log.Level = logrus.ErrorLevel // Minimum log level.
}
// newSyslog - Creates a hook to be added to an instance of logger.
func newSyslog(network, raddr string, priority syslog.Priority, tag string) (*syslogHook, error) {
w, err := syslog.Dial(network, raddr, priority, tag)
return &syslogHook{w, network, raddr}, err
}
// Fire - fire the log event
func (hook *syslogHook) Fire(entry *logrus.Entry) error {
line, err := entry.String()
if err != nil {
return fmt.Errorf("Unable to read entry, %v", err)
}
switch entry.Level {
case logrus.PanicLevel:
return hook.writer.Crit(line)
case logrus.FatalLevel:
return hook.writer.Crit(line)
case logrus.ErrorLevel:
return hook.writer.Err(line)
default:
return nil
}
}
// Levels -
func (hook *syslogHook) Levels() []logrus.Level {
return []logrus.Level{
logrus.PanicLevel,
logrus.FatalLevel,
logrus.ErrorLevel,
}
}