For my medium article "Containers: Terminating with grace"

medium-terminating-with-grace.py

# source code
# shamelessly copied from
# https://stackoverflow.com/a/31464349/2591014

import signal
import time

class GracefulKiller:
  kill_now = False
  signals = {
    signal.SIGINT: 'SIGINT',
    signal.SIGTERM: 'SIGTERM'
  }

  def __init__(self):
    signal.signal(signal.SIGINT, self.exit_gracefully)
    signal.signal(signal.SIGTERM, self.exit_gracefully)

  def exit_gracefully(self, signum, frame):
    print("\nReceived {} signal".format(self.signals[signum]))
    print("Cleaning up resources. End of the program")
    self.kill_now = True

if __name__ == '__main__':
  killer = GracefulKiller()
  print("Running ...")
  while not killer.kill_now:
    time.sleep(1)