1.产生日志

编写一段py脚本模拟数据的产生：

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#@Time : 2019/3/3 21:01
#@Author: qianliu
#@File : __init__.py.py
import random

import random
import time

url_paths = [
        "class/112.html",
        "class/128.html",
        "class/145.html",
        "class/146.html",
        "class/131.html",
        "class/130.html",
        "learn/821",
        "course/list"
]

ip_slices = [132,156,124,10,29,167,143,187,30,46,55,63,72,87,98,168]

http_referers = [
        "http://www.baidu.com/swd={query}",
        "https://www.sogou.com/webquery={query}",
        "http://cn.bing.com/searchq={query}",
        "https://search.yahoo.com/searchp={query}"
]

search_keyword = [
        "Spark SQL实战",
        "Hadoop基础",
        "Storm实战",
        "Spark Streaming实战",
        "大数据面试"
]

status_codes = ["200","404","500"]

def sample_url():
        return random.sample(url_paths,1)[0]

def sample_ip():
        slice = random.sample(ip_slices,4)
        return ".".join([str(item) for item in slice])

def sample_referer():
        if random.uniform(0,1) > 0.2:
                return "-"

        refer_str = random.sample(http_referers,1)
        query_str = random.sample(search_keyword,1)
        return refer_str[0].format(query=query_str[0])

def sample_status_code():
        return random.sample(status_codes,1)[0]

def generate_log(count = 10):

        time_str = time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())

        f = open("/home/hadoop/access.log","w+")

        while count >= 1:
                query_log = "{ip}\t{local_time}\t\"GET /{url} HTTP/1.1\" \t{status_code}\t{referer}".format(url=sample_url(),ip=sample_ip(),referer=sample_referer(),status_code=sample_status_code(),local_time=time_str)
                print(query_log)
                f.write(query_log + "\n")
                count = count-1

if __name__ == '__main__':
        generate_log(100)

tail命令监控某段日志：

tail -200f access.log   

使用crontab表达式

crontab -e
#向里面写入，就会过一分钟时间执行一次/home/hadoop/data/project/log_generator.sh这个脚本，这个脚本里面是执行生成访问记录的py脚本
*/1 * * * * /home/hadoop/data/project/log_generator.sh

这样就实现了过一段时间实现一部分访问记录：