xample, we use <a href=https://cert-manager.io>open-source cert-manager</a>.
Cert-manager has added <a href=https://cert-manager.io/docs/usage/kube-csr/>experimental Support for Kubernetes <code>CertificateSigningRequests</code></a> starting with version 1.4.</p><h2 id=deploy-custom-ca-controller-in-the-kubernetes-cluster>Deploy custom CA controller in the Kubernetes cluster</h2><ol><li><p>Deploy cert-manager according to the <a href=https://cert-manager.io/docs/installation/>installation doc</a>.</p><div><