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Gracefully shutdown in response to SIGTERM #15

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Gracefully shutdown in response to SIGTERM #15

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16 changes: 11 additions & 5 deletions duologsync/app.py
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,9 @@ def main():
args = arg_parser.parse_args()

# Handle shutting down the program via Ctrl-C
signal.signal(signal.SIGINT, sigint_handler)
signal.signal(signal.SIGINT, signal_handler)
# Handle shutting down the program via SIGTERM
signal.signal(signal.SIGTERM, signal_handler)

# Create a config Dictionary from a YAML file located at args.ConfigPath
config = Config.create_config(args.ConfigPath)
Expand Down Expand Up @@ -82,16 +84,20 @@ def main():
print(f"DuoLogSync: shutdown successfully. Check "
f"{Config.get_log_filepath()} for program logs")

def sigint_handler(signal_number, stack_frame):
def signal_handler(signal_number, stack_frame):
"""
Handler for SIGINT (Ctrl-C) to gracefully shutdown DuoLogSync
Handler for signals to gracefully shutdown DuoLogSync
"""

shutdown_reason = f"received signal {signal_number} (Ctrl-C)"
if signal_number == signal.SIGINT:
shutdown_reason = f"received signal {signal_number} (Ctrl-C)"
else:
shutdown_reason = f"received signal {signal.strsignal(signal_number)}"

Program.initiate_shutdown(shutdown_reason)

if stack_frame:
Program.log(f"DuoLogSync: stack frame from Ctrl-C is {stack_frame}",
Program.log(f"DuoLogSync: stack frame from signal is {stack_frame}",
logging.INFO)

def create_tasks(server_to_writer):
Expand Down