使用Lumberjack進行日志切割歸檔

文章目錄

• 使用Lumberjack進行日志切割歸檔
• • 安裝
  • zap logger中加入Lumberjack
  • • 測試所有功能

上述程序中唯一缺少的就是日志切割歸檔功能。

但是Zap庫本身不支持切割歸檔日志文件。

為了添加日志切割歸檔功能，我們將使用第三方庫Lumberjack來實現。

安裝

執行下面的命令安裝Lumberjack

go get github.com/natefinch/lumberjack

zap logger中加入Lumberjack

要在zap中加入Lumberjack支持，我們需要修改WriteSyncer代碼。我們將按照下面的代碼修改getLogWriter()函數：

func getLogWriter() zapcore.WriteSyncer {lumberJackLogger := &lumberjack.Logger{Filename: "./test.log",MaxSize: 10,MaxBackups: 5,MaxAge: 30,Compress: false,}return zapcore.AddSync(lumberJackLogger) }

Lumberjack Logger采用以下屬性作為輸入:

• Filename: 日志文件的位置
• MaxSize：在進行切割之前，日志文件的最大大小（以MB為單位）
• MaxBackups：保留舊文件的最大個數
• MaxAges：保留舊文件的最大天數
• Compress：是否壓縮/歸檔舊文件

測試所有功能

最終，使用Zap/Lumberjack logger的完整示例代碼如下：

package mainimport ("github.com/natefinch/lumberjack""go.uber.org/zap""go.uber.org/zap/zapcore""net/http" )var sugarLogger *zap.SugaredLoggerfunc main() {InitLogger()defer sugarLogger.Sync()simpleHttpGet("www.google.com")simpleHttpGet("http://www.google.com") }func InitLogger() {writeSyncer := getLogWriter()encoder := getEncoder()core := zapcore.NewCore(encoder, writeSyncer, zapcore.DebugLevel)logger := zap.New(core, zap.AddCaller())sugarLogger = logger.Sugar() }func getEncoder() zapcore.Encoder {encoderConfig := zap.NewProductionEncoderConfig()encoderConfig.EncodeTime = zapcore.RFC3339TimeEncoderencoderConfig.EncodeLevel = zapcore.CapitalLevelEncoderreturn zapcore.NewConsoleEncoder(encoderConfig) }func getLogWriter() zapcore.WriteSyncer {lumberJackLogger := &lumberjack.Logger{Filename: "./test.log",MaxSize: 10,MaxBackups: 5,MaxAge: 30,Compress: false,}return zapcore.AddSync(lumberJackLogger) }func simpleHttpGet(url string) {sugarLogger.Debugf("Trying to hit GET request for %s", url)resp, err := http.Get(url)if err != nil {sugarLogger.Errorf("Error fetching URL %s : Error = %s", url, err)} else {sugarLogger.Infof("Success! statusCode = %s for URL %s", resp.Status, url)resp.Body.Close()} }

執行上述代碼，下面的內容會輸出到文件——test.log中:

2022-03-24T23:38:57+08:00 DEBUG SugaredLogger/main.go:42 Trying to hit GET request for www.google.com 2022-03-24T23:38:57+08:00 ERROR SugaredLogger/main.go:45 Error fetching URL www.google.com : Error = Get "www.google.com": unsupported protocol scheme "" 2022-03-24T23:38:57+08:00 DEBUG SugaredLogger/main.go:42 Trying to hit GET request for http://www.google.com 2022-03-24T23:39:18+08:00 ERROR SugaredLogger/main.go:45 Error fetching URL http://www.google.com : Error = Get "http://www.google.com": dial tcp 108.160.162.102:80: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. 2022-03-24T23:48:14+08:00 DEBUG 10Lumberjack/main.go:48 Trying to hit GET request for www.google.com 2022-03-24T23:48:14+08:00 ERROR 10Lumberjack/main.go:51 Error fetching URL www.google.com : Error = Get "www.google.com": unsupported protocol scheme "" 2022-03-24T23:48:14+08:00 DEBUG 10Lumberjack/main.go:48 Trying to hit GET request for http://www.google.com 2022-03-24T23:48:35+08:00 ERROR 10Lumberjack/main.go:51 Error fetching URL http://www.google.com : Error = Get "http://www.google.com": dial tcp 173.252.108.21:80: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

同時，可以在main函數中循環記錄日志，測試日志文件是否會自動切割和歸檔（日志文件每1MB會切割并且在當前目錄下最多保存5個備份）。

承接上文：

使用Uber-go Zap日志庫

參考資料：

https://www.liwenzhou.com/posts/Go/zap/

總結

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