Technology · Ebook

cert-manager: Automating TLS Certificates on Kubernetes

by Shriira Press

cert-manager is the standard way to automate TLS certificates on Kubernetes: declare the certificate you want and it requests, validates, stores, and renews it for you — retiring the expired-certificate outage for good. This free book teaches it from first principles: just enough TLS and PKI to be dangerous, cert-manager's operator architecture and CRDs, Issuers and ClusterIssuers, the Certificate resource and its lifecycle, the ACME protocol with HTTP-01 and DNS-01 challenges, automatic HTTPS through Ingress annotations, private CAs and Vault for internal services and mTLS, a systematic troubleshooting method, and the practices that keep certificate automation reliable and secure. Ten focused chapters with real manifests and clear diagrams that take you from concepts to hands-off HTTPS everywhere.

Contents

1. 1Preface
2. 2Chapter 1 — What cert-manager Is
3. 3Chapter 2 — TLS and PKI Basics
4. 4Chapter 3 — Architecture and Resources
5. 5Chapter 4 — Issuers and ClusterIssuers
6. 6Chapter 5 — The Certificate Resource
7. 7Chapter 6 — ACME and Domain Validation
8. 8Chapter 7 — Ingress Integration and Automatic TLS
9. 9Chapter 8 — Private CAs and Other Issuers
10. 10Chapter 9 — Troubleshooting
11. 11Chapter 10 — Best Practices and Putting It Together