ExpediaGroup / overwhelm

Operator for complex application deployment on Kubernetes

overwhelm

Overwhelm is an operator that facilitates application deployment on Kubernetes.

Traditionally, deploying an application on Kubernetes consists of creating multiple resources. Rather than having to create multiple resources and monitor them separately, Overwhelm aims to instead define an entire "application" in a single Kubernetes object, and expose all status information through that same object, effectively making it possible to manage and monitor an entire application by using a single resource.

Development

This repository uses operator-sdk.

To create a new CRD with the corresponding Go files:

operator-sdk create api --group core --version v1alpha1 --kind Application --resource=true --controller=true --namespaced=true

Running Overwhelm on Kind

⚠ Make sure you have the required binaries installed. If you don't have them, execute make kind-install-deps

• Create the Kind cluster by executing make kind-create-cluster
• Deploy overwhelm by executing make kind-deploy
• (optional) Install a dummy Application by executing make kind-install-dummy-app

To clean the Kind cluster, execute make kind-clean.

Helm Charts

• The .charts folder contains the overwhelm helm chart.
• make helmManifests will update the chart templates if any changes are made to the helm resources.
• To debug using helm install of the resources execute make kind-helm-debug once you create a Kind cluster.

Prerequisite

This project is based on golang 1.17. Make sure your GoRoot is configured to 1.17. If any other version then you may face issues.

Testing

• Kubebuilder uses @Ginkgo and @Gomega test suites which are configured in controllers/suite_test.go
• Run make test to test your changes.
• Reference materials: Gomega and Ginkgo