In an earlier post, Installing Harbor with Helm, I described in detail how to install Ingress and Harbor and finally push an image successfully. There the domain was publicly reachable and the certificate was issued by a certificate authority. In an intranet environment, however, we need to use an internal domain name for access.

1. SSL Certificates Let’s start with a few concepts. 1.1 Digital Certificates A digital certificate contains the public or private key used for encryption, along with some additional identity information. Anyone can use the relevant tools to generate their own digital certificate, for encrypting files and email, or for securing communications.