go 第三方包 tail 使用

tail 是惠普云开发的 用于日志跟随

简单使用

package tail

import (
	"fmt"
	"time"

	"github.com/hpcloud/tail"
)

func Tailinit() {
	filename := "./file.log"
	config := tail.Config{
		ReOpen:    true,  // 重新打开
		MustExist: false, // 文件不存在不报错
		Poll:      true,
		Follow:    true, //是否跟随
		Location: &tail.SeekInfo{ //从文件的哪个地方开始读
			Offset: 0,
			Whence: 2,
		},
	}
	tails, err := tail.TailFile(filename, config)
	if err != nil {
		fmt.Println("tail file failed,err:", err)
		return
	}
	var (
		line *tail.Line
		ok   bool
	)
	for {
		line, ok = <-tails.Lines
		if !ok {
			fmt.Printf("tail file close reopen,filename:%s\n", tails.Filename)
			time.Sleep(time.Second)
			continue
		}
		fmt.Println("msg:", line.Text)
	}

}