go 不停模拟 写日志

package main

import (
	"os"
	"errors"
	"math/rand"
	"time"
	"log"
	"strconv"
)

func init() {
	rand.Seed(time.Now().Unix())
	file := "/www/logs/test.log";
	logFile, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0766)
	if err != nil {
		panic(err)
	}
	log.SetOutput(logFile) // 将文件设置为log输出的文件
	log.SetPrefix("[elk-test]")
	log.SetFlags(log.LstdFlags | log.Lshortfile | log.LUTC)
}


func main() {
	

	for {
		go func() {
			strs := []string{"浏览页面", "评论商品", "加入收藏", "加入购物车", "提交订单", "使用优惠券", "领取优惠券", "搜索", "查看订单"}

			a, _ := Random(strs, 1)


			now := time.Now()
			date := now.Format("2006-01-02 15:04:05")

			userId := rand.Intn(10000)

			result := "brady|" +strconv.Itoa(userId+1) + "|" + a + "|" + date;

			log.Println(result) // log 还是可以作为输出的前缀
		}()

		time.Sleep(1*time.Second)
	}


}

func Random(strings []string, length int) (string, error) {
	if len(strings) <= 0 {
		return "", errors.New("the length of the parameter strings should not be less than 0")
	}

	if length <= 0 || len(strings) <= length {
		return "", errors.New("the size of the parameter length illegal")
	}

	for i := len(strings) - 1; i > 0; i-- {
		num := rand.Intn(i + 1)
		strings[i], strings[num] = strings[num], strings[i]
	}

	str := ""
	for i := 0; i < length; i++ {
		str += strings[i]
	}
	return str, nil
}

　　

结果 

[elk-test]2020/07/05 01:10:22 main.go:42: brady|1203|加入收藏|2020-07-05 09:10:22

[elk-test]2020/07/05 01:10:23 main.go:42: brady|6144|领取优惠券|2020-07-05 09:10:23

[elk-test]2020/07/05 01:10:24 main.go:42: brady|7903|提交订单|2020-07-05 09:10:24

[elk-test]2020/07/05 01:10:25 main.go:42: brady|9768|领取优惠券|2020-07-05 09:10:25

[elk-test]2020/07/05 01:10:26 main.go:42: brady|6031|查看订单|2020-07-05 09:10:26

[elk-test]2020/07/05 01:10:27 main.go:42: brady|7422|评论商品|2020-07-05 09:10:27

[elk-test]2020/07/05 01:10:28 main.go:42: brady|497|查看订单|2020-07-05 09:10:28

[elk-test]2020/07/05 01:10:29 main.go:42: brady|6295|搜索|2020-07-05 09:10:29

[elk-test]2020/07/05 01:10:30 main.go:42: brady|7660|搜索|2020-07-05 09:10:30

[elk-test]2020/07/05 01:10:31 main.go:42: brady|1622|加入购物车|2020-07-05 09:10:31

[elk-test]2020/07/05 01:10:32 main.go:4