CRD Schema Validation

Difficulty: senior

Source: devops-interviews/devops-interview-questions by Alex Muradov

Answer

Scenario

You manage a CustomResourceDefinition (CRD) for "Widgets". Currently, the API allows users to create widgets with missing or invalid configuration, which causes the controller to crash.

Task

Modify the existing widgets.mycompany.io CRD to enforce a schema. Require the field spec.size to be present. Restrict spec.size to be an integer with a minimum value of 1. Attempt to create a custom resource named bad-widget (provided in the file bad-widget.yaml) that is missing the size field. Verify that the creation fails and the resource is not created.

📹 Video Solution