Linux日志怎么切割_Linux日志通过编写Go脚本实现日志切割的示例代码

package main
<p>import (
"fmt"
"os"
"path/filepath"
"time"
)</p><p>const maxLogSize = 100 <em> 1024 </em> 1024 // 100MB
const logFilePath = "/var/log/myapp.log"</p><p>func rotateLog() error {
info, err := os.Stat(logFilePath)
if os.IsNotExist(err) {
return nil // 文件不存在，无需切割
}
if err != nil {
return fmt.Errorf("stat error: %v", err)
}</p><pre class='brush:php;toolbar:false;'>if info.Size() < maxLogSize {
    return nil // 未超限，不切割
}

// 构造备份文件名：myapp.log.20250405-140203
backupName := fmt.Sprintf("%s.%s", logFilePath, time.Now().Format("20060102-150405"))

err = os.Rename(logFilePath, backupName)
if err != nil {
    return fmt.Errorf("rename failed: %v", err)
}

// 创建新的空日志文件
_, err = os.Create(logFilePath)
if err != nil {
    return fmt.Errorf("create new log file failed: %v", err)
}

fmt.Printf("Log rotated: %s -> %s\n", logFilePath, backupName)
return nil

ticker := time.NewTicker(10 * time.Second) // 每10秒检查一次
defer ticker.Stop()

for {
    select {
    case <-ticker.C:
        err := rotateLog()
        if err != nil {
            fmt.Fprintf(os.Stderr, "Rotation error: %v\n", err)
        }
    }
}