python动态监控日志内容的示例

logFile1 = "test1.log"
logFile2 = 'test2.log'

#日志文件一般是按天产生，则通过在程序中判断文件的产生日期与当前时间，更换监控的日志文件
#程序只是简单的示例一下，监控test1.log 10秒，转向监控test2.log
def monitorLog(logFile):
print '监控的日志文件 是%s' % logFile
# 程序运行10秒，监控另一个日志
stoptime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time() + 10))
popen = subprocess.Popen('tail -f ' + logFile, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
pid = popen.pid
print('Popen.pid:' + str(pid))
while True:
line = popen.stdout.readline().strip()
# 判断内容是否为空
if line:
print(line)
# 当前时间
thistime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))
if thistime >= stoptime:
# 终止子进程
popen.kill()
print '杀死subprocess'
break
time.sleep(2)
monitorLog(logFile2)

if __name__ == '__main__':
monitorLog(logFile1)