This is Brian -- I wrote the article (I suspect I will be typing that a lot tonight). We do clusters with 3 nodes per restaurant, so at full scale (when we have rolled out to every restaurant in the chain) that will be ~6000 nodes, and growing by new stores * 3 going forward. This will support an estimated 100k IoT "things" of various types in the next year and a half to two years (estimate)

Hey Brian, I have been investigating deploying a very similar stack to what you guys are using now. How are you handling onsite load balancing? Is it a simple round robin type load balancer at the router level?

Also is Highlander open source? I don't see a link to it in the article.

We will open source highlander eventually, but it’s not quite there yet.

We use a VIP that the NUCs share... ie; one of the three will always have a VIP, and if it dies another NUC grabs it. This is a poor man’s load balancer in that sense, because we only have the NUC hardware onsite;

https://github.com/kubernetes/contrib/tree/master/keepalived...

We are also looking at metallb