Deploying a Flask and React Microservice to AWS EC2

Objectives

Part 1

• Create a production Dockerfile that uses multistage Docker builds
• Utilize Amazon Elastic Container Registry (ECR) to store built images
• Configure CodeBuild to run when code is checked in to GitHub
• Run unit and integrations tests and check code for quality and formatting issues on CodeBuild

Part 2

• Configure RDS for data persistence
• Configure an Application Load Balancer (ALB) along with ECS to run a set of microservices
• Send container logs to CloudWatch
• Update a running container via a zero-downtime deployment strategy to not disrupt the current users your application
• Use AWS Fargate with ECS to deploy a microservice
• Spin up AWS infrastructure via Terraform

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ISSUES WITH MAC M1:

• Requirements.txt file:

  • can't include psycopg2-binary == 2.9.3 due to libpq version 10 issue

  • instead include this as part of your dependencies in your Dockerfile:

    RUN apt update -y \
    && apt install -y build-essential libpq-dev
    
    RUN pip3 install psycopg2-binary --no-binary psycopg2-binary
    
    

• When deploying on Fargate, must indicate "--platform=linux/amd64" in your Dockerfile:

  • example:

    FROM --platform=linux/amd64 public.ecr.aws/docker/library/node:18-alpine as builder
    
    

Issues Hot Loading with React-Script 5.x.x

• If browser is trying to open a websocket back to the node server to ws://localhost:3000 add the following as an environment variable:

  WDS_SOCKET_PORT=0