You can orchestrate an Azure Function right inside .NET Aspire, complete with a local Azurite storage emulator and a single place (the Aspire dashboard) to observe everything. This post walks through a minimal setup using the isolated worker model on .NET 9.

What we’ll build

• A simple HTTP-triggered Azure Function (/api/Hello)
• An Azurite container for Storage (Blob/Queue/Table)
• An Aspire AppHost that:
  • starts Azurite,
  • wires the Function’s AzureWebJobsStorage,
  • exposes the Function on port 7071

Create the project

# Templates
dotnet new install Microsoft.Azure.Functions.Worker.ProjectTemplates
dotnet new func -n AzureFunction -F net9.0

dotnet new install Microsoft.Azure.Functions.Worker.ItemTemplates
dotnet new http -n Hello -A Anonymous -p:n AzureFunction

# Aspire orchestration
dotnet new aspire-apphost -n AppHost
dotnet new aspire-servicedefaults -n ServiceDefaults

# (macOS) Core Tools for local runs
brew tap azure/functions
brew install azure-functions-core-tools@4
echo 'export PATH="/opt/homebrew/opt/azure-functions-core-tools@4/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc

func --version

Folder layout

09_AzureFunction/
├─ AppHost/
├─ ServiceDefaults/
├─ AzureFunction.csproj
├─ Program.cs
├─ Hello.cs
├─ host.json
├─ local.settings.json
└─ README.md

Continue reading “Running Azure Functions locally with .NET Aspire + Azurite” →