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Pepr

Hooks

Source: hello-pepr-hooks

Pepr actions (Mutate and Validate) automatically translate to Kubernetes admission webhooks. This example demonstrates which webhook types are triggered for different action configurations.

When you define Pepr actions, they automatically register as Kubernetes admission webhooks:

  • Mutate() actions → MutatingWebhookConfiguration
  • Validate() actions → ValidatingWebhookConfiguration

When to Use

Section titled “When to Use”

Use this pattern when you need to:

  • Understand how Pepr actions map to Kubernetes webhooks
  • Debug admission webhook configurations
  • Verify which webhook types are registered for your module
  • Troubleshoot webhook ordering and execution

Code Examples

Section titled “Code Examples”

View full example on Github

Mutate and Validate: Creates both MutatingWebhook and ValidatingWebhook entries for the same resource.

When(a.Secret)
  .IsCreated()
  .InNamespace(name)
  .WithName("mutate-and-validate")
  .Mutate(function mutateMutVal() {});


When(a.Secret)
  .IsCreated()
  .InNamespace(name)
  .WithName("mutate-and-validate")
  .Validate(function validateMutVal(request) {
    return request.Approve();
  });
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