During the "cert-manager: 2020 retrospective" on 6th January 2021 (see retro dashboard), we discussed the need for a diagram about the "internals" of cert-manager.

The goal is to represent a well-known flow (the creation of a Certificate using Let's Encrypt) and draw all the cert-manager CRDs and Secrets related to this flow.

I had drawn a quick diagram a long time ago:

I then started converting the drawing to a textik diagram, but I soon realized it wouldn't be as practical as I intended it to be:

As @coderanger suggested a month ago, there might be a better way with https://mermaid-js.github.io/mermaid/#/sequenceDiagram.

Irbe's high-level diagram: https://miro.com/app/board/o9J_lUdPqQI=/

Irbe's great diagram: