AWS EC2 instance setup

AMI - Amazon Linux 2

Backend

Installation

Install Python3

sudo yum install python3 pip3

Create Virtualenv

sudo pip3 install virtualenv

Install dependencies by removing versions in requirements.txt - numpy, ipython..

source venv/bin/activate

pip install -r requirements_new.txt

Verify if it is running

gunicorn --preload --workers 4 --threads 100 main:app --timeout 600

Deployment

Install nginx

sudo amazon-linux-extras install nginx1 -y
sudo systemctl enable nginx
sudo systemctl start nginx

Update the timeout blocks in server in nginx.conf

server {
    # ... here goes your proxy configuration

    # Avoid 504 HTTP Timeout Errors
    proxy_connect_timeout       605;
    proxy_send_timeout          605;
    proxy_read_timeout          605;
    send_timeout                605;
    keepalive_timeout           605;
}

• Create sites-enabled and sites-available directories

# Soft link both the directories

cd sites-enabled
sudo ln -s ../sites-available/foo.conf .
ls -l

• Create files with route names

# verify the configuration
sudo nginx -t

# reload nginx service
sudo nginx -s reload

Install certbot

sudo wget -r --no-parent -A 'epel-release-*.rpm' https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/e/
sudo rpm -Uvh dl.fedoraproject.org/pub/epel/7/x86_64/Packages/e/epel-release-*.rpm
sudo yum-config-manager --enable epel*
sudo yum install -y certbot
sudo yum install -y python-certbot-nginx

Add a cron job to renew the certificate

SLEEPTIME=$(awk 'BEGIN{srand(); print int(rand()*(3600+1))}'); echo "0 0,12 * * * root sleep $SLEEPTIME && certbot renew -q" | sudo tee -a /etc/crontab > /dev/null

Run using systemd process manager

1. Create a mutual.service file in /etc/systemd/system
2. Start the service

Frontend

Install Nodejs v14

sudo yum update -y
sudo yum install -y gcc gcc-c++ make openssl-devel git
curl --silent --location https://rpm.nodesource.com/setup_14.x | sudo bash -
sudo yum install -y nodejs

Install Yarn

npm install --global yarn

Install process manager pm2

sudo npm install pm2@latest -g