I have a K3s cluster set up consisting of 3 Raspberry Pi’s each running Raspberry Pi OS light (Raspbian). In a virtual machine on my Windows PC, running Ubuntu Desktop, I have setup rancher to manage the K3s cluster. Now I deployed PiHole on the cluster using the GitHub repo from Colin McCarthy. I have installed it using the manifest files from the repo and afterwards configuring it via Rancher. For pihole-https I configured the port 30080 on the IP 192.168.0.180 (which is the IP of the Master-Plane of my cluster). I did similar changes for DNS and DNS-UDP for DNS Requests but with port 30053.