Lihat sumber Deployment Aplikasi Flask di Ubuntu 24.04

Deployment Aplikasi Flask di Ubuntu 24.04, dari awal sampai bisa diakses via browser pakai domain atau IP publik. Kita akan deploy menggunakan '''Gunicorn + Nginx''' supaya production-ready.  

==Install Dependensi Dasar==

 sudo apt update && sudo apt upgrade -y
 sudo apt install python3 python3-pip python3-venv nginx -y

==Siapkan Direktori Project==

 mkdir ~/flaskapp
 cd ~/flaskapp
 python3 -m venv venv
 source venv/bin/activate

==Install Flask dan Gunicorn==

 pip install flask gunicorn

==Buat Aplikasi Flask (`app.py`)==

 # app.py
 
 from flask import Flask 
 
 app = Flask(__name__)
 
 @app.route('/')
 def home():
     return "Hello, Metro TV from Flask on Ubuntu 24.04!" 

==Test Jalankan Lokal==

 python app.py

Tambahkan ini kalau kamu mau bisa akses langsung:

 if __name__ == '__main__':
     app.run(host='0.0.0.0')

==Jalankan dengan Gunicorn==

 gunicorn --bind 0.0.0.0:8000 app:app

Cek dengan: `http://YOUR_SERVER_IP:8000`

==(Opsional) Buat File Service Systemd==

 sudo nano /etc/systemd/system/flaskapp.service

Isi dengan:

 [Unit]
 Description=Gunicorn instance to serve flaskapp
 After=network.target 
 
 [Service]
 User=ubuntu
 Group=www-data
 WorkingDirectory=/home/ubuntu/flaskapp
 Environment="PATH=/home/ubuntu/flaskapp/venv/bin"
 ExecStart=/home/ubuntu/flaskapp/venv/bin/gunicorn --workers 3 --bind unix:flaskapp.sock -m 007 app:app
 
 [Install]
 WantedBy=multi-user.target

> Ganti `ubuntu` sesuai user kamu, dan `WorkingDirectory` sesuai folder.

Lalu:

 sudo systemctl daemon-reexec
 sudo systemctl daemon-reload
 sudo systemctl start flaskapp
 sudo systemctl enable flaskapp

==Konfigurasi Nginx==

 sudo nano /etc/nginx/sites-available/flaskapp

Isi dengan:

 nginx
 server {
     listen 80;
     server_name your_domain.com;  # Atau IP kamu
 
     location / {
         include proxy_params;
         proxy_pass http://unix:/home/ubuntu/flaskapp/flaskapp.sock;
     }
 }

Aktifkan config-nya:

 sudo ln -s /etc/nginx/sites-available/flaskapp /etc/nginx/sites-enabled
 sudo nginx -t
 sudo systemctl restart nginx

==(Opsional) Tambah HTTPS dengan Let's Encrypt==

Install Certbot:

 sudo apt install certbot python3-certbot-nginx -y

Dapatkan SSL gratis:

 sudo certbot --nginx -d your_domain.com

==Final Cek==

* Akses aplikasi: `http://your_domain.com` atau `http://your_server_ip`
* Gunicorn berjalan sebagai service
* Nginx mengarahkan trafik ke Flask

==Bonus: Struktur Folder==

 flaskapp/
 │
 ├── app.py
 ├── venv/
 └── flaskapp.sock (auto created by gunicorn)


==Pranala Menarik==

* [[Web Programming]]