Hmm, any change you could try to figure out what would work instead? I don't have prometheus 2 atm in prod where varnish would be running to test this. Probably something quite simple, but am not an expert in building prom/grafana queries. You can send a PR or just paste me the fixed query here if you want to out.

Sorry, I'm very new to Prometheus (just trying it out), and new to Varnish. Just wanted to try out your exporter and found incompatibility ;)
What what I see some functions needs to be changed, but as I said - I'm not Prometheus nor Varnish expert - so don't really know what should be what exactly.

Not that much important for me. Treat this as simple reminder ;)