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go get github.com/sirupsen/logrus

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import (

  log "github.com/sirupsen/logrus"

)

log.Println("标准log")

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import (

  log "github.com/sirupsen/logrus"

)

func main() {

  log.Info("info")

}

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log.WithFields(log.Fields{

  "flag":    true,

  "name": "zhangsan",

  }).Fatal("fatal")

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log.SetFormatter(&log.JSONFormatter{})

log.SetFormatter(&log.TextFormatter{

  ForceColors:   true,

  FullTimestamp: true,

  })

log.SetOutput(os.Stdout)

log.SetLevel(log.WarnLevel)

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file, err := os.OpenFile("logs/cus.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)

if err == nil {

    log.Out = file

} else {

    log.Info("Failed to log to file, using default stderr")

}

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writer, err := rotatelogs.New(

    "文件名"+".%Y%m%d%H%M", // 分割后的文件名称

    rotatelogs.WithLinkName("文件名"),      // 生成软链，指向最新日志文件

    rotatelogs.WithMaxAge(time.Hour*24*365),             // 设置最大保存时间

    rotatelogs.WithRotationTime(time.Hour*24), // 设置日志切割时间间隔

)

if err != nil {

    log.Errorf("config local file system logger error", err)

}

lfHook := lfshook.NewHook(lfshook.WriterMap{

    logrus.DebugLevel: writer, // 为不同级别设置不同的输出目的

    logrus.InfoLevel:  writer,

    logrus.WarnLevel:  writer,

    logrus.ErrorLevel: writer,

    logrus.FatalLevel: writer,

    logrus.PanicLevel: writer,

}, &logrus.TextFormatter{DisableColors: true})

//最后加入hook

log.AddHook(lfHook)