Then there were issues with the network stack. I tried Weave as recommended by Alex, but that didn’t work, so I switched to Flannel. I was then able to get the markdown to HTML converter example running. However, when I went to try setting up a dashboard I couldn’t get that to run because of issues with Flannel. Maybe I’ll try Calico next?
As for the hardware, I’ve added three more Pi’s to make a seven node cluster (one master and six workers).
I’ll have to spend some more time search google and reading documentation to figure this one out.