ASP.NET Core observability w/ Grafana OSS Stack

Sample application showing how to write up ASP.NET Core with OpenTelemetry and export to Prometheus, Loki, and Tempo using the OpenTelemetry Collector

Prerequisites

• .NET SDK v7.0+
• Docker Desktop

Setup

The demo is made up of a few projects written in C#.

• Web API - Backend HTTP Weather API built with ASP.NET Core
• Website - Front facing UI using the default Blazor Server template

Configured Ports 🔌

Application	Port(s)
Web API	5006
Website	5238
Loki	3100
Prometheus UI	9090
Grafana UI	3000
OpenTelemetry Collector	4317, 4318

Running the demo 🚀

Run the infrastructure components with the provided docker-compose.yml file.

>  docker compose -p grafana-demo up   

👀 This setup will create a ./tmp/ folder in the root of the project folder that will be mounted as a volume in the infrastructure containers.

Start both .NET applications

Backend Web API

> cd src/BackendApiService
> dotnet run 

Front facing web API

> cd src/MainService
> dotnet run