# Knative serving sample applications

This directory contains sample applications, developed on Knative, to illustrate
different use-cases and resources. See
[Knative serving](https://github.com/knative/docs/tree/master/serving) to learn
more about Knative Serving resources.

| Name                       | Description                                                                                                                                                                                                              |                                                                                                                                                             Languages                                                                                                                                                              |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| Hello World                | A quick introduction that highlights how to deploy an app using Knative Serving.                                                                                                                                         | [C#](helloworld-csharp/README.md), [Go](helloworld-go/README.md), [Java](helloworld-java/README.md), [Kotlin](helloworld-kotlin/README.md), [Node.js](helloworld-nodejs/README.md), [PHP](helloworld-php/README.md), [Python](helloworld-python/README.md), [Ruby](helloworld-ruby/README.md), [Scala](helloworld-scala/README.md) |
| Advanced Deployment        | Simple blue/green-like application deployment pattern illustrating the process of updating a live application without dropping any traffic.                                                                              |                                                                                                                                                  [YAML](blue-green-deployment.md)                                                                                                                                                  |
| Autoscale                  | A demonstration of the autoscaling capabilities of Knative.                                                                                                                                                              |                                                                                                                                                    [Go](autoscale-go/README.md)                                                                                                                                                    |
| Private Repo Build         | An example of deploying a Knative Serving Service using a Github deploy-key and a DockerHub image pull secret.                                                                                                           |                                                                                                                                               [Go](build-private-repo-go/README.md)                                                                                                                                                |
| Buildpack for Applications | A sample app that demonstrates using Cloud Foundry buildpacks on Knative Serving.                                                                                                                                        |                                                                                                                                               [.NET](buildpack-app-dotnet/README.md)                                                                                                                                               |
| Buildpack for Functions    | A sample function that demonstrates using Cloud Foundry buildpacks on Knative Serving.                                                                                                                                   |                                                                                                                                           [Node.js](buildpack-function-nodejs/README.md)                                                                                                                                           |
| Github Webhook             | A simple webhook handler that demonstrates interacting with Github.                                                                                                                                                      |                                                                                                                                                   [Go](gitwebhook-go/README.md)                                                                                                                                                    |
| gRPC                       | A simple gRPC server.                                                                                                                                                                                                    |                                                                                                                                                    [Go](grpc-ping-go/README.md)                                                                                                                                                    |
| Knative Routing            | An example of mapping multiple Knative services to different paths under a single domain name using the Istio VirtualService concept.                                                                                    |                                                                                                                                                 [Go](knative-routing-go/README.md)                                                                                                                                                 |
| REST API                   | A simple Restful service that exposes an endpoint defined by an environment variable described in the Knative Configuration.                                                                                             |                                                                                                                                                    [Go](rest-api-go/README.md)                                                                                                                                                     |
| Source to URL              | A sample that shows how to use Knative to go from source code in a git repository to a running application with a URL.                                                                                                   |                                                                                                                                                  [Go](source-to-url-go/README.md)                                                                                                                                                  |
| Telemetry                  | This sample runs a simple web server that makes calls to other in-cluster services and responds to requests with "Hello World!". The purpose of this sample is to show generating metrics, logs, and distributed traces. |                                                                                                                                                    [Go](telemetry-go/README.md)                                                                                                                                                    |
| Thumbnailer                | An example of deploying a "dockerized" application to Knative Serving which takes video URL as an input and generates its thumbnail image.                                                                               |                                                                                                                                                   [Go](thumbnailer-go/README.md)                                                                                                                                                   |
| Traffic Splitting          | This samples builds off the [Creating a RESTful Service](./rest-api-go) sample to illustrate applying a revision, then using that revision for manual traffic splitting.                                                 |                                                                                                                                                [YAML](traffic-splitting/README.md)                                                                                                                                                 |