Gracefully Kill #python

gracefully_kill.md

Gracefully Kill Process

Unix/Linux

On Unix or Linux, it's easy to gracefully kill a application by sending it the SIGTERM signal. If its process ID is 1234, you can simply run kill 1234 or kill -s TERM 1234 or kill -15 1234.

Inside target-killed application, you receive the SIGTERM signal, clean up(such as data backup,...etc) and exit.

A simple python solution,

# https://stackoverflow.com/questions/18499497/how-to-process-sigterm-signal-gracefully
import signal
import time

class GracefulKiller:
  kill_now = False
  def __init__(self):
    signal.signal(signal.SIGINT, self.exit_gracefully)
    signal.signal(signal.SIGTERM, self.exit_gracefully)

  def exit_gracefully(self,signum, frame):
    self.kill_now = True

if __name__ == '__main__':
  killer = GracefulKiller()
  while not killer.kill_now:
    time.sleep(1)
    print("doing something in a loop ...")

  print("End of the program. I was killed gracefully :)")

Windows

dotnet core gracefully shutdown process

Kill child process when parent was killed