Zonké Docs

Django Lambda Deployments

An AWS code pipeline is created for each Django application. This pipeline is responsible for deploying the infrastructure and the application code. The pipeline is triggered when a new commit is pushed to the specified branch of the application's repository.

Django Monolith Lambda with Database

Django Lambda Deployment

Static Files

Static files of the Django application are deployed to an S3 bucket. The deployed bucket is private and all static files are served using CloudFront.

Lambda Servers

Lambda servers handle API requests and other server-side logic for the Django application. The lambda servers are placed in a private subnet and are not directly accessible from the internet.

Lambda Warmers

A lambda warmer function is used to call the server lambda functions. This is done to reduce the cold start time of the lambda functions. The lambda warmer function is triggered by an EventBridge event and is scheduled to run every 5 minutes. The dashboard allows you to configure the number of servers to keep warm.

Django lambda functions are dockerized. This makes warmers absolutely necessary because the cold start time of a dockerized function is significantly longer than a non-dockerized function.

Secrets

Secrets are stored in AWS Secrets Manager and are exposed to the lambda servers as environment variables. The Zonké dashboard allows you to add, update, and delete secrets for the Django application. Secrets are only stored in your AWS account and are encrypted at rest and in transit. The Django application can access these secrets using os.getenv and directly from Secrets Manager.

Database

The Django application is deployed with a database. The database is deployed using RDS and is accessible from the lambda servers. Database credentials are stored in AWS Secrets Manager and, just like other service secrets, they are exposed to the lambda servers as secrets. The database is placed in an isolated subnet and is only accessible from the lambda servers.

Database Migrations

Django applications run database migrations during deployment. A migration lambda function is created and triggered by the pipeline during application deployment. You do not need to configure anything in your codebase to run migrations.