Ubuntu Flask Steps

ubuntu-flask-steps.txt

sudo apt-get update
sudo apt-get install python3-pip python3-dev nginx
sudo -H pip3 install --upgrade pip
sudo -H pip3 install virtualenv
mkdir ~/myproject
cd ~/myproject
virtualenv myprojectenv
source myprojectenv/bin/activate
pip install gunicorn flask
vim ~/myproject/myproject.py
    from flask import Flask
    app = Flask(__name__)

    @app.route("/")
    def hello():
        return "<h1 style='color:blue'>Hello There!</h1>"

    if __name__ == "__main__":
        app.run(host='0.0.0.0')
python myproject.py
vim ~/myproject/wsgi.py
    from myproject import app

    if __name__ == "__main__":
        app.run()
cd ~/myproject
gunicorn --bind 0.0.0.0:5000 wsgi:app
deactivate
sudo vim /etc/systemd/system/myproject.service
    [Unit]
    Description=Gunicorn instance to serve myproject
    After=network.target

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

    [Install]
    WantedBy=multi-user.target
sudo systemctl start myproject
sudo systemctl enable myproject
sudo vim /etc/nginx/sites-available/myproject
    server {
        listen 80;
        server_name server_domain_or_IP;

        location / {
            include proxy_params;
            proxy_pass http://unix:/home/ubuntu/myproject/myproject.sock;
        }
    }
sudo ln -s /etc/nginx/sites-available/myproject /etc/nginx/sites-enabled
sudo nginx -t
sudo rm /etc/nginx/sites-enabled/default
sudo systemctl restart nginx