Start python flask webserver automatically after b

问题:

I'm using flask as a webserver for my UI (it's a simple web interface which controls the recording using gstreamer on ubuntu from a webcam and a framegrabber simultaneously / kinda simple player)

Every time I need to run the command "python main.py" to run the server from command prompt manually.

I've tried the init.d solution or even writing a simple shell script and launching it every time after rebooting the system on start up but it fails to keep the server up and running till the end (just invokes the server and terminates it I guess)

is there any solution that could help me to start the webserver every time after booting the system on startup and keep it on and running?

I'd like to configure my system to boot directly into the browser so don't wanna have any need for more actions by the user.

Any Kind of suggestion/help is appreciated.

回答1:

I'd like to suggest using supervisor, the documentation is here

---

for a very simple demo purpose, after you installed it and finish the set up, touch a new a file like this:

[program:flask_app]                                                                  
command = python main.py                                      
directory = /dir/to/your/app                            
autostart = true                                                                
autorestart = true

then

$ sudo supervisorctl update

Now, you should be good to go. The flask app will start every time after you boot you machine.(note: distribution package has already integrated into the service management infrastructure, if you're using others, see here)

to check whether you app is running:

$ sudo supervisorctl status

---

For production, you can use nginx+uwsgi+supervisor. The flask deployment documentation is here

回答2:

One well documented solution is to use Gunicorn and Nginx server:

1. Install Components and setup a Python virtualenv with dependencies
2. Create the wsgi.py file :

from myproject import application

    if __name__ == "__main__":

         application.run()

That will be handled by Gunicorn :

gunicorn --bind 0.0.0.0:8000 wsgi

3. Configure Gunicorn with setting up a systemd config file: /etc/systemd/system/myproject.service :

 [Unit]
    Description=Gunicorn instance to serve myproject
    After=network.target

 [Service]
    User=sammy
    Group=www-data
    WorkingDirectory=/home/sammy/myproject
    Environment="PATH=/home/sammy/myproject/myprojectenv/bin"
    ExecStart=/home/sammy/myproject/myprojectenv/bin/gunicorn 
    --workers 3 --bind unix:myproject.sock -m 007 wsgi:app

[Install]
    WantedBy=multi-user.target

4. Start the Gunicorn service at boot :

    sudo systemctl start myproject
    sudo systemctl enable myproject