Serverless Web Apps with Docker & Zappa

See the accompanying blog post for more information.

Setup

Make sure you have poetry, the AWS CLI & docker installed on your system
Clone the repo and set your working directory to the root of the repository (i.e. cd path/to/zappa-serverless-docker)
Run poetry install --no-root
- You may need to run pip install --upgrade pip after (for some reason poetry is using an older version of pip
Activate your new virtual environment with poetry shell

Run zappa save-python-settings-file lambda_docker_flask -o zappa_settings.py to generate & save the Python settings file required by Zappa
Build the Docker image with docker build -t lambda-docker-flask:latest .
Create a new ECR repository by running aws ecr create-repository --repository-name lambda-docker-flask --image-scanning-configuration scanOnPush=true
Authenticate your local machine so it can push images to your repostiroy by running aws ecr get-login-password | docker login --username AWS --password-stdin <your_registry_id>.dkr.ecr.us-east-1.amazonaws.com
Point your Docker image to your new repository docker tag lambda-docker-flask:latest <your_registry_id>.dkr.ecr.us-east-1.amazonaws.com/lambda-docker-flask:latest
And push it docker push <your_registry_id>.dkr.ecr.us-east-1.amazonaws.com/lambda-docker-flask:latest

Deploying the lambda function with your new Docker image can be accomplished by using the zappa deploy command and passing in the Docker image URI:

zappa deploy lambda_docker_flask -d <your_registry_id>.dkr.ecr.us-east-1.amazonaws.com/lambda-docker-flask:latest