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Copy pathlogger.go
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121 lines (109 loc) · 3.08 KB
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/*
* 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 main
import (
"bufio"
"bytes"
"os"
"reflect"
"runtime"
"runtime/debug"
"strconv"
"strings"
"github.com/Sirupsen/logrus"
"github.com/dustin/go-humanize"
)
type fields map[string]interface{}
var log = logrus.New() // Default console logger.
// logger carries logging configuration for various supported loggers.
// Currently supported loggers are
//
// - console [default]
// - file
// - syslog
//
type logger struct {
Console consoleLogger `json:"console"`
File fileLogger `json:"file"`
Syslog syslogLogger `json:"syslog"`
// Add new loggers here.
}
// sysInfo returns useful system statistics.
func sysInfo() map[string]string {
host, err := os.Hostname()
if err != nil {
host = ""
}
memstats := &runtime.MemStats{}
runtime.ReadMemStats(memstats)
return map[string]string{
"host.name": host,
"host.os": runtime.GOOS,
"host.arch": runtime.GOARCH,
"host.lang": runtime.Version(),
"host.cpus": strconv.Itoa(runtime.NumCPU()),
"mem.used": humanize.Bytes(memstats.Alloc),
"mem.total": humanize.Bytes(memstats.Sys),
"mem.heap.used": humanize.Bytes(memstats.HeapAlloc),
"mem.heap.total": humanize.Bytes(memstats.HeapSys),
}
}
// stackInfo returns printable stack trace.
func stackInfo() string {
// Convert stack-trace bytes to io.Reader.
rawStack := bufio.NewReader(bytes.NewBuffer(debug.Stack()))
// Skip stack trace lines until our real caller.
for i := 0; i <= 4; i++ {
rawStack.ReadLine()
}
// Read the rest of useful stack trace.
stackBuf := new(bytes.Buffer)
stackBuf.ReadFrom(rawStack)
// Strip GOPATH of the build system and return.
return strings.Replace(stackBuf.String(), minioGOPATH+"/src/", "", -1)
}
// errorIf synonymous with fatalIf but doesn't exit on error != nil
func errorIf(err error, msg string, data ...interface{}) {
if err == nil {
return
}
sysInfo := sysInfo()
fields := logrus.Fields{
"cause": err.Error(),
"type": reflect.TypeOf(err),
"sysInfo": sysInfo,
}
if globalTrace {
fields["stack"] = "\n" + stackInfo()
}
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 {
return
}
sysInfo := sysInfo()
fields := logrus.Fields{
"cause": err.Error(),
"type": reflect.TypeOf(err),
"sysInfo": sysInfo,
}
if globalTrace {
fields["stack"] = "\n" + stackInfo()
}
log.WithFields(fields).Fatalf(msg, data...)
}