log-agent/taillog/taillog.go

package taillog

import (
	"fmt"
	"github.com/hpcloud/tail"
)

//专门从日志文件收集日志的模块

var (
	tailChan *tail.Tail
)

func Init(fileName string) (err error) {
	config := tail.Config{
		Location:  &tail.SeekInfo{Offset: 0, Whence: 2}, //从文件的哪个地方开始读 filebeat记录了文件断点的位置
		ReOpen:    true,                                 //重新打开，切分用
		MustExist: false,                                //文件不存在不报错
		Poll:      true,
		Follow:    true, //是否跟随
	}
	tailChan, err = tail.TailFile(fileName, config)
	if err != nil {
		fmt.Printf("tail file error:%s\n", err)
	}
	return
}

func ReadChan() <-chan *tail.Line {
	return tailChan.Lines
}