CODEWITHSUNDEEP
pythonlinuxflask
Joe
Joe

Reputation: 13091

Run a Flask app forever, even after reboot

I have a running Flask app that is working fine on a Linux (CentOS) server. To make it work in the background I started it within a screen session. There is scheduled downtime for the server every night. The next day all screen sessions are gone. How can I keep my Flask app or screen sessions always up and running after reboots?

Upvotes: 1

Views: 1959

Answers (2)

shahid shaik
shahid shaik

Reputation: 1

Create shell script(/home/newuser/myserver.sh) to run the flask server.

source /home/newuser/FastAPI_Python/Flask_new_venv/Scripts/activate
export FLASK_APP=/home/newuser/FastAPI_Python/app.py
nohup python3 -m flask run --host=0.0.0.0 --debugger > /home/newuser/log.txt 2>&1 &

Add the same shell script to cron job:

[newuser@master_server ~]$ crontab -e
@reboot /bin/sh /home/newuser/myserver.sh

Note:

FastAPI_Python/Flask_new_venv/Scripts/activate

is the flask application with virtual enviroment configured.

Upvotes: 0

Draconis
Draconis

Reputation: 3461

Han Solo gave a good answer in his comment: if you run it as a systemd service, it'll run on boot, restart if it crashes, and so on.

However, if you just need a quick-and-dirty solution for a couple days while you configure the service properly, you can use cron:

  • Run crontab -e to edit your crontab file

  • Add a line at the bottom that looks like this:

    @reboot [put your command here]

  • Save and exit the editor

  • sudo reboot to test it and make sure it works

And you're done! The command will now run whenever the system reboots.

Upvotes: 1

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