- 1 year ago
Python SIGINT handler not working with PM2 process monitoring
When using PM2 process monitoring with Python, the default behavior of PM2 is to handle the SIGINT signal (generated by pressing Ctrl+C) itself and not pass it to the child process (your Python script).
To ensure that your Python SIGINT handler works correctly with PM2 process monitoring, you can follow these steps:
Install the
pm2-windows-startup
package globally by running the following command:npm install pm2-windows-startup -g
Configure PM2 to use the
pm2-windows-startup
module by running the following command:pm2-startup install
This will set up PM2 to start automatically on system startup and ensure that the SIGINT signal is properly handled.
Update your Python script to handle the SIGINT signal. Make sure to use the
signal
module and thesignal.signal()
function to register your SIGINT handler.Here's an example of how you can handle the SIGINT signal in Python:
pythonimport signal
import sys
def sigint_handler(signal, frame):
# Perform cleanup or any necessary actions when SIGINT is received
print("SIGINT received. Exiting...")
sys.exit(0)
# Register the SIGINT handler
signal.signal(signal.SIGINT, sigint_handler)
# Your script logic here
print("Running script...")
while True:
pass # Your script's main logic goes here
In the above example, the
sigint_handler
function is called when the SIGINT signal is received. You can customize this function to perform any necessary cleanup tasks before exiting.
By following these steps, your Python SIGINT handler should work correctly with PM2 process monitoring. When you press Ctrl+C, PM2 will forward the SIGINT signal to your Python script, and your SIGINT handler will be invoked accordingly.