DotNet Web App on AWS Fargate

This repository contains AWS CDK project for demo ASP.Net Core 5 application hosted on AWS Fargate. It is my playground for learning AWS.

Below diagram illustrates important architecture components and interactions of this project.

The diagram might not always be up to date with the code

Notable problems solved in this project

Deploying dockerized dotnet app on ECS
Configuring ECS to use exposed app's healthcheck endpoint on non-public port
Configuring ELB to use the same healthcheck endpoint
- with required security group modifications
- healthcheck is only exposed internally. Can not be requested from the internet
Log processing by sidecar Fluentbit container with CloudWatch target
- allows us to define advanced log processing pipeline
- processes logs from files instead of app's stdout
Sharing filesystem across multiple containers
Sidecar nginx reverse proxy
- allows us to configure some common behaviour outside of the app. E.g. compression.
- it really is just an example how to do it if we need it
Secrets management using SSM Parameter Store
- secrets are stores as single SSM parameter encoded as JSON document
- app downloads secrets to local filesystem on startup
Automatic app redeployment on secret change
- example of configuration that will ensure that when SSM parameter is updated app is redeployed and downloads the latest value
Custom metrics from app's logs
CloudWatch Dashboard with custom metrics
Utilizing CloudMap's service discovery for direct app-to-app communication