# What is cert-manager?

cert-manager, Easy (Beginner), Concepts. https://k8wiz.com/uquiz/what-is-cert-manager

- A. A Kubernetes controller for managing TLS certificates
- B. A tool for generating self-signed certificates
- C. A certificate authority service
- D. A web-based certificate management interface

**Answer:** A Kubernetes controller for managing TLS certificates

**Explanation:** cert-manager is a Kubernetes native certificate management controller that helps with issuing certificates from various sources like Let's Encrypt, HashiCorp Vault, Venafi, or a simple signing key pair. It ensures certificates are valid and up-to-date, and attempts to renew certificates at a configured time before expiry.