Automating the provision of certificates 

As mentioned in the introduction to this chapter, we will use the Cert Manager to automate the provision of certificates used by the external HTTPS endpoint exposed by the ingress. The Cert Manager will run as an add-on in Kubernetes and will be configured to request the issuing of certificates from Let's Encrypt with a free Certificate Authority that can be used to automate the issuing of certificates. To be able to verify that we own the DNS name that the certificate shall be issued for, Let's Encrypt requires access to the endpoint we want to issue the certificate for. Since our Kubernetes cluster runs locally in Minikube, we must make it possible for Let's Encrypt to access our cluster during the provisioning. We will use the ngrok tool to create a temporary HTTP tunnel...