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Published: Jan 25, 2017 License: Apache-2.0 Imports: 39 Imported by: 0


Kubernetes Certificate Manager

This project is loosely based on https://github.com/kelseyhightower/kube-cert-manager It took over most of its documentation, license, as well as the general approach to how things work.

The code itself however, was entirely reimplemented to use xenolf/lego as the basis instead of reimplemented an ACME client + dns plugins


  • Manage Kubernetes TLS secrets backed by Let's Encrypt issued certificates.
  • Manage Let's Encrypt issued certificates based on Kubernetes ThirdParty Resources.
  • Manage Let's Encrypt issued certificates based on Kubernetes Ingress Resources.
  • Domain validation using ACME HTTP-01, SNI-TLS-01 or DNS-01 challenges.
  • Support for multiple challenge providers.

Project Goals

  • Demonstrate how to build custom Kubernetes controllers.
  • Demonstrate how to use Kubernetes Third Party Resources.
  • Demonstrate how to interact with the Kubernetes API (watches, reconciliation, etc).
  • Demonstrate how to write great documentation for Kubernetes add-ons and extensions.
  • Promote the usage of Let's Encrypt for securing web applications running on Kubernetes.


  • Kubernetes 1.3+
  • At least one configured challenge provider
  • A Kubectl with the same 1.x version as your cluster (ie. kubectl 1.3.x for a 1.3 cluster, and kubectl 1.4.x for a 1.4 cluster)




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