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Gain insights into building serverless applications on Kubernetes, using Knative, Tekton for CI/CD pipelines, and integrating GitHub for automated builds and deployments through GitHub events.

How to Build a Serverless App Platform on Kubernetes-01.png

knative.tar.gz

DigitalOcean Account

Install Knative

​​Businesses are modernizing and adopting multi-cloud approaches to deliver services. This shift in application deployment has given rise to containerization and Kubernetes for the deployment, management, and scaling of containerized applications. 

This course introduces you to serverless computing and shows you how to build serverless applications using Knative. It teaches CI/CD using Tekton and shows you how to build pipelines triggered by GitHub events. You will create a pipeline that builds container images using Build and, later, Cloud Native Buildpacks. 

In the last part of the course, you will build a web application that integrates with GitHub using a GitHub App, and triggers application build and deployment in response to GitHub events.

Building a Serverless App Platform on Kubernetes

# Configure the URL for EventListener

**GitHub webhooks** allow us to build or set up integrations that subscribe to certain events on GitHub. When one of these events is triggered, it'll send an HTTP POST payload to the webhook's configured URL. We'll use GitHub webhooks to trigger our Tekton `build-deploy` Pipeline. We'll need a URL for the EventListener service to which GitHub will send HTTP requests.


 To expose a URL for the EventListener service, run the command given below after replacing the `<EXTERNAL_IP>`  with the cluster's IP in the `eventListenerBinding.yaml` file.

```shell
kubectl apply -f eventListenerBinding.yaml
```

Here's the command that you can use to check the external IP of the cluster:
 ```shell
  kubectl get svc -n  kourier-system -o yaml | grep ip:
```


> **Note:** Click the “Run” button under the widget shown below and enter the command given above in the terminal. 

Learn how to add a GitHub webhook to our build-deploy Pipeline.

Before We Begin

Introduction

Using Knative to Run Serverless Applications

CI/CD Using Tekton

Automate Tekton Pipeline Execution

Build Container Images without Dockerfile

Build the UI For the Platform

Listen for Events from GitHub

Configure the URL for EventListener