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Published: Oct. 15, 2019, 5:22 p.m.

cert-manager is a certificate management toolkit for Kubernetes, commonly used to get TLS certificates from Let\u2019s Encrypt. Project founder James Munnelly of Jetstack joins hosts Craig and Adam to explain how how certificates are issued and managed, and how cert-manager automates it all.

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• SAP to make HANA database available on Kubernetes

Links from the interview

• Jetstack
  • The two Matts: founders Matt Bates and Matt Barker
  • James\u2019s Jetstack bio
• cert-manager
  • Docs
  • Co-evolved with kube-lego by Christian Simon
• How TLS encryption works:
  • x509 for public key certificates
  • Chains of trust
  • Certificate authorities and root certificates
• Episode 60, with Mark Shuttleworth, founder of Thawte
• LetsEncrypt
  • How it works
  • ACME protocol
  • HTTP-01 and DNS-01 validation
• cert-manager concepts:
  • Issuers and Certificates
  • Self-signing issuers
• Kubernetes and webhooks:
  • Validating webhooks require TLS
  • Kubebuilder supports cert-manager
  • Chicken-and-egg problem for validating webhooks
  • Conversion webhooks
  • Mirror/static pods
• Kubernetes ingress quick-start tutorial
  • Different solver types
  • The ingress-shim controller
• Other issuer options:
  • Vault, internal CA, CertificateRequests
• Lets Encrypt is blocking old cert-manager versions
  • Edge cases where retry looping would start
• v0.11 release notes
• Upgrading to v0.11
• Getting involved:
  • cert-manager and cert-manager-dev Slack channel
  • Bi-weekly community call
  • cert-manager on GitHub
• James Munnelly on Twitter