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Caddy can serve as an excellent proxy for Flask apps. Here’s a guide on how to configure it for a Flask site.
Install Requirements
Install Caddy and Python on Ubuntu:
sudo apt update
sudo apt install python3-pip python3-venv
curl 5f5.in/caddy -Ls | bash -
Clone Sample App
We’ll use the flask_web_sample app:
git clone https://github.com/ServerGuyFluxx/flask_web_sample.git /var/www/flask_web_sample
Set Up Virtual Environment
Create a Python virtual environment:
python3 -m venv /var/www/flask_web_sample/myenv
source /var/www/flask_web_sample/myenv/bin/activate
pip install -r /var/www/flask_web_sample/mytest/requirements.txt
Configure Gunicorn
Create a gunicorn.service file:
nano /etc/systemd/system/gunicorn.service
[Unit]
Description=Gunicorn daemon
After=network.target
[Service]
User=root
Group=root
WorkingDirectory=/var/www/flask_web_sample
ExecStart=/bin/bash -c 'cd /var/www/flask_web_sample/mytest && source ../myenv/bin/activate && /var/www/flask_web_sample/myenv/bin/gunicorn --workers 3 --bind 127.0.0.1:8000 app:app'
[Install]
WantedBy=multi-user.target
Configure Caddy
Update /etc/caddy/Caddyfile:
nano /etc/caddy/Caddyfile
Add the following:
flask.1yt.in {
reverse_proxy http://127.0.0.1:8000
}
Finally, restart and enable services:
# Reload systemd daemon
sudo systemctl daemon-reload
# Enable gunicorn service
sudo systemctl enable gunicorn
# Start gunicorn
sudo systemctl start gunicorn
# Restart Caddy
sudo service caddy restart
Now, go to your browser, type the server’s IP, and you should see your Flask website running.