Check liveness

check_liveness.py

#!/usr/bin/env python

# for ns in $(kubectl get ns |grep -i ctaf |awk {'print $1'}); do python -W ignore check_ingress.py host01 host02; done

import requests
import sys

def has_via(url):
  r = requests.get(url, verify=False, timeout=1)
  return r.headers.get('Via')

if __name__ == '__main__':
  for addr in sys.argv[1:]:
    try:
      if has_via('https://'+addr):
        print('ALIVE: https://' + addr)
      else:
        print('DEAD: https://' + addr)
    except Exception:
      print('TIMEOUT: https://' + addr)