Go：zap log rotate（日志轮转）

Go：zap log rotate（日志轮转）

Demo：

package main

import (
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
	"gopkg.in/natefinch/lumberjack.v2"
)

func main() {
          
   
	// 日志级别
	logLevel := "DEBUG"

	atomicLevel := zap.NewAtomicLevel()
	switch logLevel {
          
   
		case "DEBUG":
			atomicLevel.SetLevel(zapcore.DebugLevel)
		case "INFO":
			atomicLevel.SetLevel(zapcore.InfoLevel)
		case "WARN":
			atomicLevel.SetLevel(zapcore.WarnLevel)
		case "ERROR":
			atomicLevel.SetLevel(zapcore.ErrorLevel)
		case "DPANIC":
			atomicLevel.SetLevel(zapcore.DPanicLevel)
		case "PANIC":
			atomicLevel.SetLevel(zapcore.PanicLevel)
		case "FATAL":
			atomicLevel.SetLevel(zapcore.FatalLevel)
	}
	encoderConfig := zapcore.EncoderConfig{
          
   
		TimeKey:        "time",
		LevelKey:       "level",
		NameKey:        "name",
		CallerKey:      "line",
		MessageKey:     "msg",
		FunctionKey:    "func",
		StacktraceKey:  "stacktrace",
		LineEnding:     zapcore.DefaultLineEnding,
		EncodeLevel:    zapcore.LowercaseLevelEncoder,
		EncodeTime:     zapcore.ISO8601TimeEncoder,
		EncodeDuration: zapcore.SecondsDurationEncoder,
		EncodeCaller:   zapcore.FullCallerEncoder,
		EncodeName:     zapcore.FullNameEncoder,
	}

	// 日志轮转
	writer := &lumberjack.Logger{
          
   
		// 日志名称
		Filename:   "test1280.log",
		// 日志大小限制，单位MB
		MaxSize:    100,
		// 历史日志文件保留天数
		MaxAge:     30,
		// 最大保留历史日志数量
		MaxBackups: 10,
		// 本地时区
		LocalTime:  true,
		// 历史日志文件压缩标识
		Compress:   false,
	}

	zapCore := zapcore.NewCore(
		zapcore.NewJSONEncoder(encoderConfig),
		zapcore.AddSync(writer),
		atomicLevel,
	)
	logger := zap.New(zapCore, zap.AddCaller())
	defer logger.Sync()

	logger.Sugar().Debug("test1280s debug")
	logger.Sugar().Infof("test1280s %s", "infof")
	logger.Sugar().Warnf("test1280s %s", "warnf")
	logger.Sugar().Error("test1280s error")
}

执行：

EB@DESKTOP-K45IA6V MINGW64 ~/Desktop/test1280
$ go run main.go

结果：

EB@DESKTOP-K45IA6V MINGW64 ~/Desktop/test1280
$ cat test1280.log
{
          
   "level":"debug","time":"2021-05-25T22:23:44.846+0800","line":"C:/Users/EB/Desktop/test1280/main.go:71","func":"main.main","msg"
:"test1280s debug"}
{
          
   "level":"info","time":"2021-05-25T22:23:44.863+0800","line":"C:/Users/EB/Desktop/test1280/main.go:72","func":"main.main","msg":
"test1280s infof"}
{
          
   "level":"warn","time":"2021-05-25T22:23:44.863+0800","line":"C:/Users/EB/Desktop/test1280/main.go:73","func":"main.main","msg":
"test1280s warnf"}
{
          
   "level":"error","time":"2021-05-25T22:23:44.863+0800","line":"C:/Users/EB/Desktop/test1280/main.go:74","func":"main.main","msg"
:"test1280s error"}

原生zap不提供log rotate日志轮转功能，依赖于第三方库lumberjack：

https://github.com/natefinch/lumberjack

本Demo日志轮转核心代码：

// 日志轮转
	writer := &lumberjack.Logger{
          
   
		// 日志名称
		Filename:   "test1280.log",
		// 日志大小限制，单位MB
		MaxSize:    100,
		// 历史日志文件保留天数
		MaxAge:     30,
		// 最大保留历史日志数量
		MaxBackups: 10,
		// 本地时区
		LocalTime:  true,
		// 历史日志文件压缩标识
		Compress:   false,
	}
	......
	zapCore := zapcore.NewCore(
		...
		zapcore.AddSync(writer),
		...
	)

参考：

1.https://github.com/natefinch/lumberjack 2.https://github.com/uber-go/zap 3.https://pkg.go.dev/go.uber.org/zap 4.https://studygolang.com/articles/32205?fr=sidebar