how to make your python web app always running on ubuntu machine

Question

I have a web app that I deployed to a machine that has ubuntu 20 installed to be able to run the app I should open ssh to the ubuntu machine and then run this command

cd mywebapp
python3 app.py

it works successfully, but once I close the ssh console or reboot the machine or anything happens, it stopped and I have to repeat these commands

I tried to add it as a corn job to be run after machine reboot but it does not work

I post a question in the following link : run python app after server restart does not work using crontab

nothing work with me, and I have to make sure that this web app will always be running because it should be working to send push notification to mobile devices

can anyone please advice, I have been searching and trying for so many time

I solved it using the details in the following link : https://stackoverflow.com/questions/75058536/systemd-service-keep-giving-me-error-when-start-or-get-status — Amira Elsayed Ismail, Feb 05 '23 at 10:32

score 0 · Accepted Answer · answered Jan 09 '23 at 12:23

0

I'm not expert in it, but two solutions come in my mind:

1- Using systemd:

systemd can be responsible to keep services up.

You can write a custom unit for your app, and config it as a way to be up always.

This tutorial may be useful: writing unit

2- Using Docker:

When you have containerized app, you config it as to come up, on failure or anything like that.

Read about it here

answered Jan 09 '23 at 12:23

Amin

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I tried your first suggested way, but I still having a problem, I made a question about it, can you check please : https://stackoverflow.com/questions/75058536/systemd-service-keep-giving-me-error-when-start-or-get-status – Amira Elsayed Ismail Jan 09 '23 at 14:14
check the `journalctl -u airnotifier.service` to see if there is anything useful @AmiraElsayedIsmail – Amin Jan 09 '23 at 16:54

score 0 · Answer 2 · answered Jan 09 '23 at 12:34

What if you have the calling piece of Python script within a bash script and run that as a daemon:

Your bash script could like below (test.sh):

#!/bin/sh
cd desired/directory
python3 app.py

and you can run the bashscript like this by using nohup:

nohup ./test.sh 0<&- &>/dev/null &

You could refer this, if you want to store the outputs of nohup.

how to make your python web app always running on ubuntu machine

2 Answers2