dynamodb-capacity-reports

This script will scan your all dynamodb and based on usage of last 15 days it will recommend new provisioned capacity of each dynamodb table along with GSI. After then it will create a report in csv format and upload it to mentioned s3 bucket.

Prepare System

cd /home/ec2-user/fastapi/ #consider fastapi is your project directory
virtualenv -p python venv
source venv/bin/activate

Our virtualenv is active now run dependent python package using pip.

(venv) $ pip install -r requirements.txt

Run Projects Locally

with Uvicorn

uvicorn main:app --host 0.0.0.0 --port 8080

with Docker

docker run -it -p 8085:80 ishubhoshaha/dynamodb_capacity_reports:latest

Deploy FastApi in Linux AMI

Configure Nginx

sudo amazon-linux-extras install nginx1

Create nginx configuration file.

sudo vim /etc/nginx/conf.d/<file_name>.conf

Write down following simple nginx configuration file.

server {
    listen 443;
    server_name <domain-name/IP>;
    keepalive_timeout 5;
}

Unlike Debian system in Amazon Linux AMI you don't you have to create symlink to sites-enabled directory. To enable your nginx run following command.

sudo systemctl daemon-reload
sudo systemctl enable nginx.service
sudo systemctl start nginx.service

Now Run following command to run our FastApi Server to check our Nginx Configuration working or not.

gunicorn -w 4 -k uvicorn.workers.UvicornWorker main:app -b 0.0.0.0:8085

Note: While your run this command make sure you enable your virtualenv and and the context path is root directory of your project.

Remember to change main:app on above command as per your project. Now that our application is running and the proxy server is configured properly we should be able to visit the URL and see our application from a browser.

Configure service to run our project

Now that our application is deployed and configured properly one last thing to do is to create a service for the Gunicorn server so that it is always running and it automatically starts when the server is rebooted. We will user systemd to create the service.

sudo vi /etc/systemd/system/<service-name>.service

Write following configuration into the file. And remember to change inside the file as per your project.

[Unit]
Description=Gunicorn instance to serve my FASTAPI
After=network.target

[Service]
User=ec2-user # you can change as per your project
Group=ec2-user
WorkingDirectory=/home/ec2-user/fastapi/src
Environment="PATH=/home/ec2-user/fastapi/venv/bin"
ExecStart=/home/ec2-user/fastapi/venv/bin/gunicorn -w 4 -k uvicorn.workers.UvicornWorker main:app -b 0.0.0.0:8085

[Install]
WantedBy=multi-user.target

Now our service file is ready. Enable service so that this systemd service can run our project.

sudo systemctl start myapp.service
sudo systemctl enable myapp.service