Raspberry Pi temp to ELK

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
from datetime import datetime
from elasticsearch import Elasticsearch
import RPi.GPIO as GPIO
import ipgetter
GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.OUT)

tFile = open('/sys/class/thermal/thermal_zone0/temp')
temp = float(tFile.read())
tempC = temp/1000
tFile.close()
GPIO.cleanup()
ext_ip = ipgetter.myip()

es = Elasticsearch(host='my.server.com', port=9200, http_auth=('admin', 'admin'))
doc = {
    'temperature': tempC,
    'external_ip': ext_ip,
    'author': 'tomas',
    'timestamp': datetime.now()
       }
res = es.index(index="raspberry", doc_type='sys_stats', body=doc)
print datetime.now()
print tempC
print ext_ip
print(res['created'])

sys.exit()