python實現DB系統預警連絡人API

在我們維護系統時，需要把系統的警示資訊即時傳遞給相應同學，如果把連絡方式直接寫到指令碼裡，對以後的維護變更將埋下禍根，尤其是成百上千的系統。為此這裡寫了個擷取連絡人資訊的API 。

資料庫配置中心表：

CREATE TABLE `db_alertcontact` (
 `id` INT(11) NULL DEFAULT NULL,
 `levelid` INT(11) NULL DEFAULT NULL COMMENT 'contact level',
 `contact` VARCHAR(50) NULL DEFAULT NULL COMMENT 'email or phone information',
 `type` VARCHAR(50) NULL DEFAULT NULL COMMENT 'phone/email',
 `username` VARCHAR(100) NULL DEFAULT NULL,
 `group` VARCHAR(80) NULL DEFAULT NULL COMMENT 'contact group'
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB;
CREATE TABLE `db_alertlevel` (
 `id` INT(11) NULL DEFAULT NULL,
 `levelname` VARCHAR(50) NULL DEFAULT NULL COMMENT 'info/warn/err'
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB;
用法協助：

[root@skatedb55 pytest]# python contactlist.py --help
usage: Contanct API v0.1 ,(C) Copyright Skate 2014 [-h] --group GROUP --type
                                                   TYPE --level LEVEL
                                                   [--interval INTERVAL]
                                                   [--load LOAD]
optional arguments:
  -h, --help           show this help message and exit
  --group GROUP        = The contact group
  --type TYPE          = The mode of contact
  --level LEVEL        = alarm level,info/warn/err
  --interval INTERVAL  = Database query interval(s)
  --load LOAD          = The configure center database,eg:
                       load=user/pass@ip:port:dbname
[root@skatedb55 pytest]#
例子：

INSERT INTO `db_alertcontact` (`id`, `levelid`, `contact`, `type`, `username`, `group`) VALUES
 (1, 1, 'skate1@163.com', 'email', 'skate1', 'p1'),
 (2, 2, 'skate2@163.com', 'email', 'skate2', 'p2'),
 (3, 1, '1300000000', 'phone', 'skate3', 'p2'),
 (4, 1, '1311111111', 'phone', 'skate4', 'p2'),
 (5, 1, '1322222222', 'phone', 'skate5', 'p2'),
 (6, 2, 'skate6@163.com', 'email', 'skate6', 'p2');
INSERT INTO `db_alertlevel` (`id`, `levelname`) VALUES
 (1, 'info'),
 (2, 'warn'),
 (3, 'error');
[root@skatedb55 pytest]# python contactlist.py --group=p2 --type=phone --level=info --interval=10--load=root/root@10.20.0.55:3306:test6
1300000000,1311111111,www.111cn.net,
[root@skatedb55 pytest]#
[root@skatedb55 pytest]# python contactlist.py --group=p2 --type=email --level=warn --interval=10--load=root/root@10.20.0.55:3306:test6
skate2@163.com,skate6@163.com,
[root@skatedb55 pytest]#

優點：

1.在變更連絡人或連絡方式不需要修改代碼

2.連絡人的相關資訊儲存在配置中樞資料庫，為了減少對資料庫的查詢,預設每天查一次資料庫(自己可以指定)，把聯絡資訊放在本地，既提高了速度，也減少了對配置中心的依賴

3.如果想在變更聯絡資訊及時生效，只需把本地的臨時檔案"/tmp/contact_dbinfo"刪除即可

# -*- coding: utf-8 -*-
#!/usr/bin/python
#
# Author:Skate
# Time:2014/12/10
# Function: Contact API
import MySQLdb,sys
import argparse
import os
import datetime
class database:
      def __int__(self,host,user,passwd,port,dbname):
          self.conn = None
          pass
      def conn(self,host,user,passwd,port,dbname):
          self.host=host
          self.user=user
          self.passwd=passwd
          self.port=port
          self.dbname=dbname
          try:
              self.conn = MySQLdb.connect(host=self.host, user=self.user, passwd=self.passwd, db=self.dbname,port=self.port)
          except MySQLdb.Error, e:
              print "MySQL Connect Error: %s" % (e.args[1])
          return self.conn
      def closeConn(self):
          self.conn.close()
      def execute(self,sql,param):
          if self.conn==None or self.conn.open==False :
             return -1
             sys.exit
          cur = self.conn.cursor()
          cur.execute(sql,param)
          self.closeConn()
          return cur
def contactlist(group,type,level,host,user,passwd,port,dbname,interval=86400):
     tfile='/tmp/contact_dbinfo'
     list=''
     if os.path.isfile(tfile):
        a1=datetime.datetime.fromtimestamp(os.path.getctime(tfile))
        a2=datetime.datetime.now()
        diffsec = (a2 - a1).seconds
        if diffsec > interval:
           os.remove(tfile)
           f=open(tfile,'a')
           db=database()
           db.conn(host,user,passwd,port,dbname)
           sql="select t.contact,t.username,t.group,t.`type`,l.levelname from db_alertcontact t , db_alertlevel  l where  t.levelid=l.id and l.levelname=%s and t.group=%s and t.`type`=%s"
           param=(level,group,type)
           cur=db.execute(sql,param)
           results=cur.fetchall()
           for row in results:
               if row[3] =='phone':
                  #for r in row:
                  list = list + row[0] + ','
               elif row[3] == 'email':
                  #for r in row:
                  list = list + row[0] + ','
           if type =='phone':
               f.write('phonelist='+ group + ':' + list + '\n')
               f.close()
           elif type == 'email':
               f.write('emaillist='+ group + ':' +list + '\n')
               f.close()
        else:
             strsearch = type + 'list='+ group
             istype = os.popen('cat '+ tfile +' | grep ' + strsearch + ' | wc -l').readline().strip()
             if int(istype) > 0:
                 line = os.popen('cat '+ tfile +' | grep ' + strsearch).readline().strip()
                 b=line.split('=')
                 a=b[1].split(":")
                 if b[0]=='phonelist':
                     list=a[1]
                 elif b[0]=='emaillist':
                     list=a[1]
             elif int(istype) < 1:
                  f=open(tfile,'a')
                  db=database()
                  db.conn(host,user,passwd,port,dbname)
                  sql="select t.contact,t.username,t.group,t.`type`,l.levelname from db_alertcontact t , db_alertlevel  l where  t.levelid=l.id and l.levelname=%s and t.group=%s and t.`type`=%s"
                  param=(level,group,type)
                  cur=db.execute(sql,param)
                  results=cur.fetchall()
                  #list=''
                  for row in results:
                      if row[3] =='phone':
                          list = list + row[0] + ','
                      elif row[3] == 'email':
                          list = list + row[0] + ','
                  if type =='phone':
                       f.write('phonelist='+  group + ':' + list + '\n')
                       f.close()
                  elif type == 'email':
                       f.write('emaillist='+  group + ':' + list + '\n')
                       f.close()
     else:
           f=open(tfile,'a')
           db=database()
           db.conn(host,user,passwd,port,dbname)
           sql="select t.contact,t.username,t.group,t.`type`,l.levelname from db_alertcontact t , db_alertlevel  l where  t.levelid=l.id and l.levelname=%s and t.group=%s and t.`type`=%s"
           param=(level,group,type)
           cur=db.execute(sql,param)
           results=cur.fetchall()
           for row in results:
               if row[3] =='phone':
                  #for r in row:
                  list = list + row[0] + ','
               elif row[3] == 'email':
                  #for r in row:
                  list = list + row[0] + ','
           if type =='phone':
               f.write('phonelist='+  group + ':' + list + '\n')
               f.close()
           elif type == 'email':
               f.write('emaillist='+  group + ':' + list + '\n')
               f.close()
     return list
if __name__ == "__main__":
  parser = argparse.ArgumentParser("Contanct API v0.1 ,(C) Copyright Skate 2014")
  parser.add_argument('--group', action='store', dest='group',required=True,
        help=" = The contact group")
  parser.add_argument('--type', action='store', dest='type',required=True,
        help=" = The mode of contact")
  parser.add_argument('--level', action='store', dest='level',required=True,
        help=" = alarm level,info/warn/err")
  parser.add_argument('--interval', action='store', dest='interval',type=int,default=86400,
        help=" = Database query interval")
  parser.add_argument('--load', action='store', dest='load',default='',
        help=" = The configure center database,eg: \n load=user/pass@ip:port:dbname")
  results = parser.parse_args()
  load = results.load
  group = results.group
  type = results.type
  level = results.level
  interval = results.interval
  if (load !=''):
     user_info,url =  load.split("@")
     host,port,db = url.split(":")
     port=int(port)
     user,passwd = user_info.split("/",1)
  str = contactlist(group,type,level,host,user,passwd,port,db,interval)
  print str