python监控文件或目录变化

#!/usr/bin/env python
#coding=utf-8
#
#Status wd gs/ccs sql file changed
#文件有变化上传至备份主机，上传之后验证文件是否正确
#

import paramiko,os,sys,datetime,time,MySQLdb
from pyinotify import WatchManager, Notifier, ProcessEvent, IN_DELETE, IN_CREATE,IN_MODIFY
'''
CREATE TABLE `wddel_log.status_sql` (
 `ip` varchar(16) NOT NULL COMMENT '机器IP',
 `tar_name` varchar(50) NOT NULL COMMENT '备份文件名字',
 `md5` varchar(50) NOT NULL COMMENT '备份文件MD5',
 `flag` int(2) NOT NULL COMMENT '0:成功;1:失败',
 `error_log` varchar(100) NOT NULL COMMENT '错误日志',
 `uptime` datetime NOT NULL COMMENT '更新时间',
 KEY `ip` (`ip`),
 KEY `uptime` (`uptime`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8'''#日志表创建脚本
GM_path='/home/asktao/'
center_hostname='192.168.1.100'
center_username='root'
center_password='123456'
center_port=63008
def log2db(ip,tar_name,md5,flag,error='0'):#删除日志入库
  try:
    tar_name = os.path.split(tar_name)[1]
    now = time.strftime("%Y-%m-%d %H:%M:%S")
    conn = MySQLdb.connect(host = '192.168.1.104',user = 'root',passwd = '1q2w3e4r',charset='utf8',connect_timeout=20)
    cursor = conn.cursor()
    sql = "SELECT ip FROM wddel_log.status_sql WHERE ip='%s'" % ip
    cursor.execute(sql)
    res = cursor.fetchall()
    if len(res)==0:
      inster_sql = "insert into wddel_log.status_sql VALUES('%s','%s','%s',%s,'%s','%s')" % (ip,tar_name,md5,flag,error,now)
      cursor.execute(inster_sql)
      conn.commit()
    else:
      update_sql = "UPDATE wddel_log.status_sql SET md5='%s',flag='%s',error_log='%s',uptime='%s' WHERE ip='%s'" % (md5,flag,error,now,ip)
      cursor.execute(update_sql)
      conn.commit()
    cursor.close()
    conn.close()
  except Exception,e:
    print e
def find_ip():#获取本地eth0的IP地址
  ip = os.popen("/sbin/ip a|grep 'global eth0'").readlines()[0].split()[1].split("/")[0]
  if "192.168." in ip:
    ip = os.popen("/sbin/ip a|grep 'global eth1'").readlines()[0].split()[1].split("/")[0]
  return ip
def md5sum(file_name):#验证sql打包文件的MD5
  if os.path.isfile(file_name):
    f = open(file_name,'rb')
    py_ver = sys.version[:3]
    if py_ver == "2.4":
      import md5 as hashlib
    else:
      import hashlib
      md5 = hashlib.md5(f.read()).hexdigest()
      f.close()
      return md5
  else:
    return 0
def center_md5(file_name):#上传至备份中心的文件的MD5
  try:
    s=paramiko.SSHClient()
    s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    s.connect(hostname = center_hostname,port=center_port,username=center_username, password=center_password)
    conm = "/usr/bin/md5sum %s" % file_name
    stdin,stdout,stderr=s.exec_command(conm)
    result = stdout.readlines()[0].split()[0].strip()
    s.close()
    return result
  except Exception,e:
    return e
def back_file(ip,tar_name,tar_md5):#上传文件到备份中心
  remote_dir='/data/sql'
  file_name=os.path.join(remote_dir,os.path.split(tar_name)[1])
  try:
    t=paramiko.Transport((center_hostname,center_port))
    t.connect(username=center_username,password=center_password)
    sftp=paramiko.SFTPClient.from_transport(t)
    sftp.put(tar_name,file_name)
    t.close()
    #print "%s back_file OK" % tar_name
    os.remove(tar_name)
    remot_md5=center_md5(file_name)
    if remot_md5 == tar_md5:
      log2db(ip,tar_name,tar_md5,0)
    else:
      log2db(ip,tar_name,tar_md5,1,'remot_md5!=tar_md5')
  except Exception,e:
    #print "connect error!"
    log2db(ip,tar_name,tar_md5,1,e)
    os.remove(tar_name)
def back_sql():#执行备份
  ip = find_ip()
  tar_name = "/tmp/%s.tar.gz" % ip
  sql_conn = "/usr/bin/find %s -type f -name '*.sql'|/usr/bin/xargs /bin/tar zcvPf %s" % (GM_path,tar_name)
  sql_tar = os.popen(sql_conn).readlines()
  tar_md5 = md5sum(tar_name)
  if tar_md5 != 0:
    back_file(ip,tar_name,tar_md5)
  else:
    error_log = "%s not find" % tar_name
    log2db(ip,tar_name,tar_md5,0,error_log)
class PFilePath(ProcessEvent):#文件变化的触发
  def process_IN_CREATE(self, event):
    if os.path.splitext(event.name)[1] == ".sql":
      text = "Create file: %s " % os.path.join(event.path, event.name)
      #print text
      back_sql()
  def process_IN_MODIFY(self, event):
    if os.path.splitext(event.name)[1] == ".sql":
      text = "Modify file: %s " % os.path.join(event.path, event.name)
      #print text
      back_sql()
def FSMonitor():#主监控函数
  back_sql()#运行脚本先备份sql文件
  wm = WatchManager()
  mask = IN_CREATE |IN_MODIFY
  notifier = Notifier(wm, PFilePath())
  wdd = wm.add_watch(GM_path, mask, rec=True)
  print 'now starting monitor %s' % (GM_path)
  while True:
    try :
      notifier.process_events()
      if notifier.check_events():
        notifier.read_events()
    except KeyboardInterrupt:
      notifier.stop()
      break
if __name__ == "__main__":
  FSMonitor()