kafka log dir sizes

import os
import time
import datetime
import socket
from glob import glob

sep = ' '
host = socket.gethostname()

def getFolderSize(folder):
    total_size = os.path.getsize(folder)
    for item in os.listdir(folder):
        itempath = os.path.join(folder, item)
        if os.path.isfile(itempath):
            total_size += os.path.getsize(itempath)
        elif os.path.isdir(itempath):
            total_size += getFolderSize(itempath)
    return total_size


dirs = glob("/mnt/data/kafka-logs/*")


while True:
   time.sleep(30)
   for i in dirs:
      datetimenow =  datetime.datetime.now()
      if os.path.isdir(i):
         print( str(datetimenow) + sep + host + sep + i.replace('.', '_').replace('/','_') + sep + str(getFolderSize(i)))