Edge Computing

In my previous post on Prometheus and Thanos, I set up the sidecar architecture. Thanos Sidecar runs next to Prometheus, uploads TSDB blocks to object storage, and exposes data to the Querier over gRPC. For clusters sitting in the same datacenter with a fat, stable link to your central infrastructure, it’s lovely. Everything pulls. Everything talks to everything. Life is good. Then I started putting Prometheus on clusters at the edge, and life got less good. ...

What happens when your Kubernetes cluster can’t reach the internet? I don’t mean a slow connection. I mean no connection at all. Ships at sea. Remote mining sites. Factory floors with air-gapped networks. Military deployments. For a lot of people that sounds exotic, like a problem someone else has. I treat it as a baseline design requirement, and I’ll explain why it makes my homelab better even though I almost never actually pull the cable. ...