Overview

This Describes the process of allowing your program to gracefully shutdown instead of being force quit suddently. Allowing you to close things down correctly instead of leaving things hanging.

Python Class Needed

import signal
import time

class GracefulShutdown:
  kill_now = False

  def __init__(self):
      """The initializer to start watching for sigint, and sigterm signals."""
    signal.signal(signal.SIGINT, self.exit_gracefully)
    signal.signal(signal.SIGTERM, self.exit_gracefully)

  def exit_gracefully(self, *args):
    """Update the saved value of kill_now to be true to let who ever is watching know its time to start shutting down."""
    self.kill_now = True

Source: https://stackoverflow.com/questions/18499497/how-to-process-sigterm-signal-gracefully