.NET 7 on Cloud Run

.NET 7 was released a few days ago with new features and performance improvements and it’s already supported on Cloud Run on Google Cloud!

In this short blog post, I show you how to deploy a .NET 7 web app to Cloud Run.

Create a .NET 7 web app

First, make sure you’re on .NET 7:

dotnet --version

7.0.100

Create a simple web app:

dotnet new web -o helloworld-dotnet7

This creates the helloworld-dotnet7 folder with a project file. I love how simple the default Program.cs file is nowadays:

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/", () => "Hello World!");

app.Run();

For Cloud Run, you need to check for PORT and listen on 0.0.0.0. Change Program.cs to the following:

var builder = WebApplication.CreateBuilder(args);

// Add the following for Cloud Run
var port = Environment.GetEnvironmentVariable("PORT") ?? "8080";
var url = $"http://0.0.0.0:{port}";
builder.WebHost.UseUrls(url);

var app = builder.Build();

app.MapGet("/", () => "Hello World from .NET 7.0!");

app.Run();

Test locally

Let’s run the app locally for a quick test.

Start the app:

dotnet run

Building...
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: http://0.0.0.0:8080
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
      Content root path: /Users/atamel/dev/local/helloworld-dotnet7

Use curl to send a request:

curl http://localhost:8080 

Hello World from .NET 7.0!

Deploy to Cloud Run

Deploy to Cloud Run:

gcloud run deploy helloworld-dotnet7 \
    --allow-unauthenticated \
    --region us-central1 \
    --source .

Notice we’re using --source flag. Behind the scenes, this command uses Google Cloud buildpacks and Cloud Build to automatically build container images from your source code without a Dockerfile or having to install Docker on your machine.

In a few minutes, the app is deployed to Cloud Run.

Test against Cloud Run

To test against the deployed Cloud Run, get the service url and use curl:

SERVICE_URL=$(gcloud run services describe helloworld-dotnet7 --region us-central1 --format 'value(status.url)')
curl $SERVICE_URL

Hello World from .NET 7.0!

Voila! .NET 7.0 running on Cloud Run.

For questions or feedback, feel free to reach out to me on Twitter @meteatamel. Originally published at https://atamel.dev.