# What is the difference between an Issuer and a ClusterIssuer in cert-manager?

cert-manager, Medium (Advanced), Concepts. https://k8wiz.com/uquiz/what-is-the-difference-between-an-issuer-and-a-clusterissuer-in-cert-manager

- A. Issuers are for development, ClusterIssuers are for production
- B. Issuers are namespaced, ClusterIssuers are cluster-wide
- C. Issuers support ACME, ClusterIssuers support self-signed certificates
- D. Issuers are deprecated, ClusterIssuers are the recommended approach

**Answer:** Issuers are namespaced, ClusterIssuers are cluster-wide

**Explanation:** The main difference between Issuers and ClusterIssuers is their scope. Issuers are namespaced resources, meaning they can only issue certificates within their own namespace. ClusterIssuers are cluster-wide resources, meaning they can issue certificates in any namespace.