Deploy Flask App to the Apache2 Web Server

Install Apache2

sudo apt install apache2

Install PHP (apabila belum ada service php)

https://linuxize.com/post/how-to-install-php-on-ubuntu-18-04/

Install Mysql Server

sudo apt install mysql-server
sudo mysql_secure_installation

Install Phpmyadmin

sudo apt install phpmyadmin

Deploy Flask

pada bagian install WSGI gunakan WSGI python versi 3 dari tutorial ini:

How to install & configure mod_wsgi for py3

sudo apt-get install libapache2-mod-wsgi-py3

Dan apabila virtual env belum terinstall, bisa mengikuti tutorial ini:

How to install virtualenv on Ubuntu 18.04

Full Deploy, tapi ingat gunakan python3

Flask

Install Certbot Apache2

How To Secure Apache with Let's Encrypt on Ubuntu 18.04 | DigitalOcean

Issue Truncated or oversized response headers received from daemon process using Django, karena didalam aplikasi menggunakan library seperti numpy dan scipy. sehingga itu membuat sistem overload oversize. Untuk mengatasi hal tersebut WSGI menyediakan solusi:

Truncated or oversized response headers received from daemon process using Django · Issue #439 ·…

https://modwsgi.readthedocs.io/en/develop/user-guides/application-issues.html#python-simplified-gil-state-api

Yaitu menambahkan

WSGIApplicationGroup %{GLOBAL}

Setting untuk HTTPS juga

Certbot Apache error "Name duplicates previous WSGI daemon definition."

Contoh Konfigurasi

ugetapp.conf (apache2)

<VirtualHost *:80>
ServerAdmin webmaster@df.hdrc.pens.ac.id
ServerName www.df.hdrc.pens.ac.id
ServerAlias df.hdrc.pens.ac.id
ErrorLog /var/www/uget/logs/error.log
CustomLog /var/www/uget/logs/access.log combined

WSGIDaemonProcess ugetapp user=www-data group=www-data threads=5
WSGIProcessGroup ugetapp
WSGIApplicationGroup %{GLOBAL}
WSGIScriptAlias / /var/www/FLASKAPPS/ugetapp/ugetapp.wsgi
Alias /static /var/www/FLASKAPPS/ugetapp/static/
<Directory /var/www/FLASKAPPS/ugetapp/static/>
Order allow,deny
Allow from all
</Directory>
</VirtualHost>

Contoh Konfigurasi Setelah di Setting HTTPS

WSGIDaemonProcess uget user=www-data group=www-data threads=5
WSGIProcessGroup uget
WSGIApplicationGroup %{GLOBAL}

<VirtualHost *:80>
ServerAdmin webmaster@df.hdrc.pens.ac.id
ServerName www.df.hdrc.pens.ac.id
ServerAlias df.hdrc.pens.ac.id
ErrorLog /var/www/uget/logs/error.log
CustomLog /var/www/uget/logs/access.log combined

WSGIScriptAlias / /var/www/FLASKAPPS/ugetapp/ugetapp.wsgi
Alias /static /var/www/FLASKAPPS/ugetapp/static/
<Directory /var/www/FLASKAPPS/ugetapp/static/>
Order allow,deny
Allow from all
</Directory>
</VirtualHost>

yang terkait dengan WSGI diletakan diluar Block port. karena akan muncul issue penggunaan nama app wsgi duplicate

Terakhir jangan lupa untuk memberikan permisson pada tiap-tiap folder dan file yang akan diakses oleh program

Flask File Upload Permission Denied

https://www.educative.io/edpresso/how-to-resolve-the-permission-denied-error-in-linux