Kubernetes CSR Requests.
Refer to the <a href=https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests/>Kubernetes CSR documentation</a> for more details. Note that the steps below are dependent on an external-source and may change.</p><h3 id=deploy-custom-ca-controller-in-the-kubernetes-cluster>Deploy Custom CA controller in the Kubernetes cluster</h3><ol><li><p>For this example, we use an <a href=https://github.com/cert-manager/signer-ca>open-source Certificate Authority implem