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minio/cmd/logger.go

157 lines
3.5 KiB

/*
* 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"
"path"
"runtime"
"strings"
"sync"
"github.com/Sirupsen/logrus"
)
type fields map[string]interface{}
var log = struct {
loggers []*logrus.Logger // All registered loggers.
mu sync.Mutex
}{}
// logger carries logging configuration for various supported loggers.
// Currently supported loggers are
//
// - console [default]
// - file
type logger struct {
sync.RWMutex
Console consoleLogger `json:"console"`
File fileLogger `json:"file"`
// Add new loggers here.
}
/// Logger related.
// Validate logger contents
func (l *logger) Validate() error {
if l == nil {
return nil
}
if err := l.Console.Validate(); err != nil {
return fmt.Errorf("`Console` field: %s", err.Error())
}
if err := l.File.Validate(); err != nil {
return fmt.Errorf("`File` field: %s", err.Error())
}
return nil
}
// SetFile set new file logger.
func (l *logger) SetFile(flogger fileLogger) {
l.Lock()
defer l.Unlock()
l.File = flogger
}
// GetFileLogger get current file logger.
func (l *logger) GetFile() fileLogger {
l.RLock()
defer l.RUnlock()
return l.File
}
// SetConsole set new console logger.
func (l *logger) SetConsole(clogger consoleLogger) {
l.Lock()
defer l.Unlock()
l.Console = clogger
}
func (l *logger) GetConsole() consoleLogger {
l.RLock()
defer l.RUnlock()
return l.Console
}
// Get file, line, function name of the caller.
func callerSource() string {
pc, file, line, success := runtime.Caller(2)
if !success {
file = "<unknown>"
line = 0
}
file = path.Base(file)
name := runtime.FuncForPC(pc).Name()
name = strings.TrimPrefix(name, "github.com/minio/minio/cmd.")
return fmt.Sprintf("[%s:%d:%s()]", file, line, name)
}
// errorIf synonymous with fatalIf but doesn't exit on error != nil
func errorIf(err error, msg string, data ...interface{}) {
if err == nil || !isErrLogged(err) {
return
}
source := callerSource()
fields := logrus.Fields{
"source": source,
"cause": err.Error(),
}
if e, ok := err.(*Error); ok {
fields["stack"] = strings.Join(e.Trace(), " ")
}
for _, log := range log.loggers {
log.WithFields(fields).Errorf(msg, data...)
}
}
// fatalIf wrapper function which takes error and prints jsonic error messages.
func fatalIf(err error, msg string, data ...interface{}) {
if err == nil || !isErrLogged(err) {
return
}
source := callerSource()
fields := logrus.Fields{
"source": source,
"cause": err.Error(),
}
if e, ok := err.(*Error); ok {
fields["stack"] = strings.Join(e.Trace(), " ")
}
for _, log := range log.loggers {
log.WithFields(fields).Fatalf(msg, data...)
}
}
// returns false if error is not supposed to be logged.
func isErrLogged(err error) (ok bool) {
ok = true
err = errorCause(err)
switch err.(type) {
case BucketNotFound, BucketNotEmpty, BucketExists:
ok = false
case ObjectNotFound, ObjectExistsAsDirectory:
ok = false
case BucketPolicyNotFound, InvalidUploadID:
ok = false
case BadDigest:
ok = false
}
return ok
}