在上一篇 windows下bat curl实现tomcat进程守护 中,根据几年前写的bat deamon程序乱改了下,实现了tomcat deamon的功能,在这篇最后也提到python实现起来,要更强大和智能的多。本篇就来一个基于python实现的功能更强大的tomcat 守护进程。目前实现的功能:

1、通过性更强 ---通过修改config文件即可实现对其他tomcat程序的守护;
2、具有日志查看 --- 轮询30个日志文件;
3、无需借助curl 等工具或安装其他环境 ---借助py2exe可以将python脚本可以生成exe文件;

代码如下:

 1#!-*- encoding: utf-8 -*-
 2# code by yangbk
 3# mysite: www.361way.com
 4import urllib2
 5import logging
 6import os
 7import time
 8from ConfigParser import ConfigParser
 9from logging.handlers import TimedRotatingFileHandler
10LOG_FILE = "./logs/output.log"
11logger = logging.getLogger()
12logger.setLevel(logging.INFO)
13fh = TimedRotatingFileHandler(LOG_FILE,when='midnight',interval=1,backupCount=7)   //每天
14datefmt = '%Y-%m-%d %H:%M:%S'
15format_str = '%(asctime)s %(levelname)s %(message)s '
16formatter = logging.Formatter(format_str, datefmt)
17fh.setFormatter(formatter)
18fh.suffix = "%Y%m%d%H%M"
19logger.addHandler(fh)
20def getUrlcode(url):
21    try:
22        start = time.time()
23        response = urllib2.urlopen(url,timeout=10)
24        msg = 'httpcode is : ' + str(response.getcode()) + ' - open use time :' + str((time.time()-start)*1000) + 'ms'
25        logging.info(msg)
26        return response.getcode()
27    except urllib2.URLError as e:
28        msg = 'open url error ,reason is:' + str(e.reason)
29        logging.info(msg)
30def get(field, key):
31    result = ""
32    try:
33        result = cf.get(field, key)
34    except:
35        result = ""
36    return result
37def read_config(config_file_path, field, key):
38    cf = ConfigParser()
39    try:
40        cf.read(config_file_path)
41        result = cf.get(field, key)
42    except:
43        sys.exit(1)
44    return result
45CONFIGFILE='./cfg/config.ini'
46os.environ["JAVA_HOME"] = read_config(CONFIGFILE,'MonitorProgram','JAVA_HOME')
47os.environ["CATALINA_HOME"] = read_config(CONFIGFILE,'MonitorProgram','CATALINA_HOME')
48ProgramPath = read_config(CONFIGFILE,'MonitorProgram','StartPath')
49ProcessName = read_config(CONFIGFILE,'MonitorProcessName','ProcessName')
50url = read_config(CONFIGFILE,'MonitorUrl','Url')
51#url = "http://dh.361way.com/"
52while True:
53    HttpCode = getUrlcode(url)
54    if HttpCode is not 200:
55         command = 'taskkill /F /FI "WINDOWSTITLE eq ' + ProcessName + '"'
56         os.system(command)
57         os.system(ProgramPath)
58    time.sleep(30)

config.ini文件的内容如下:

1[MonitorProgram]
2StartPath: C:/tomcat/bin/startup.bat
3CATALINA_HOME: C:\\tomcat\\
4JAVA_HOME: C:\\Program Files\\Java\\jdk1.8.0_31
5[MonitorProcessName]
6ProcessName: tomcat_8080
7[MonitorUrl]
8Url: http://127.0.0.1:8080

以上代码如果仅仅只针对单个应用,代码可以更简洁,因为配置文件部分可以不通过configparse模块进行读取 。而且这里对configparse模块进行了重新处理(get函数与read_config函数),避免获取的key不存在时,出现的报错情况。具体出错时的报错见下图:

configparser
configparser

产生的日志文件内容如下:

12016-10-09 15:08:30 INFO open url error ,reason is:[Errno 10061]
22016-10-09 15:09:00 INFO httpcode is 200 - open url use time 111.999988556ms
32016-10-09 15:09:30 INFO httpcode is 200 - open url use time 7.99989700317ms
42016-10-09 15:10:00 INFO httpcode is 200 - open url use time 6.00004096167ms

除此之外,还可以增加邮件通知功能,具体可以参考:python邮件发送模块

代码稍作修改,也可以很方便的通过端口检测确认业务是否健康,端口检测的脚本内容如下:

 1import os
 2import socket
 3def IsOpen(ip,port):
 4    s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
 5    try:
 6        s.connect((ip,int(port)))
 7        s.shutdown(2)
 8        print '%d is open' % port
 9        return True
10    except:
11        print '%d is down' % port
12        return False
13if __name__ == '__main__':
14    IsOpen('127.0.0.1',800)