github.com/Bytom/bytom@v1.1.2-0.20210127130405-ae40204c0b09/log/log.go (about)

     1  package log
     2  
     3  import (
     4  	"fmt"
     5  	"io/ioutil"
     6  	"os"
     7  	"path/filepath"
     8  	"strings"
     9  	"sync"
    10  	"time"
    11  
    12  	rotatelogs "github.com/lestrrat-go/file-rotatelogs"
    13  	"github.com/sirupsen/logrus"
    14  
    15  	"github.com/bytom/bytom/config"
    16  )
    17  
    18  const (
    19  	rotationTime int64 = 86400
    20  	maxAge       int64 = 604800
    21  )
    22  
    23  var defaultFormatter = &logrus.TextFormatter{DisableColors: true}
    24  
    25  func InitLogFile(config *config.Config) error {
    26  	logPath := config.LogDir()
    27  	if err := clearLockFiles(logPath); err != nil {
    28  		return err
    29  	}
    30  
    31  	hook := newBtmHook(logPath)
    32  	logrus.AddHook(hook)
    33  	logrus.SetOutput(ioutil.Discard) //控制台不输出
    34  	fmt.Printf("all logs are output in the %s directory\n", logPath)
    35  	return nil
    36  }
    37  
    38  type BtmHook struct {
    39  	logPath string
    40  	lock    *sync.Mutex
    41  }
    42  
    43  func newBtmHook(logPath string) *BtmHook {
    44  	hook := &BtmHook{lock: new(sync.Mutex)}
    45  	hook.logPath = logPath
    46  	return hook
    47  }
    48  
    49  // Write a log line to an io.Writer.
    50  func (hook *BtmHook) ioWrite(entry *logrus.Entry) error {
    51  	module := "general"
    52  	if data, ok := entry.Data["module"]; ok {
    53  		module = data.(string)
    54  	}
    55  
    56  	logPath := filepath.Join(hook.logPath, module)
    57  	writer, err := rotatelogs.New(
    58  		logPath+".%Y%m%d",
    59  		rotatelogs.WithMaxAge(time.Duration(maxAge)*time.Second),
    60  		rotatelogs.WithRotationTime(time.Duration(rotationTime)*time.Second),
    61  	)
    62  	if err != nil {
    63  		return err
    64  	}
    65  
    66  	msg, err := defaultFormatter.Format(entry)
    67  	if err != nil {
    68  		return err
    69  	}
    70  
    71  	if _, err = writer.Write(msg); err != nil {
    72  		return err
    73  	}
    74  
    75  	return writer.Close()
    76  }
    77  
    78  func clearLockFiles(logPath string) error {
    79  	files, err := ioutil.ReadDir(logPath)
    80  	if os.IsNotExist(err) {
    81  		return nil
    82  	} else if err != nil {
    83  		return err
    84  	}
    85  
    86  	for _, file := range files {
    87  		if ok := strings.HasSuffix(file.Name(), "_lock"); ok {
    88  			if err := os.Remove(filepath.Join(logPath, file.Name())); err != nil {
    89  				return err
    90  			}
    91  		}
    92  	}
    93  	return nil
    94  }
    95  
    96  func (hook *BtmHook) Fire(entry *logrus.Entry) error {
    97  	hook.lock.Lock()
    98  	defer hook.lock.Unlock()
    99  	return hook.ioWrite(entry)
   100  }
   101  
   102  // Levels returns configured log levels.
   103  func (hook *BtmHook) Levels() []logrus.Level {
   104  	return logrus.AllLevels
   105  }