example of prometheus kdb exporter

main.q

/ Usage: rlwrap q main.q -p 8080
/ Metrics can be viewed at http://localhost:8080/metrics

/ extract.q can be downloaded in https://github.com/KxSystems/prometheus-kdb-exporter
system"l /src/prometheus-kdb-test/lib/extract.q"

labelkeys:`city
labelvalues:enlist "Tokyo"

.prom.newmetric[`temperature;`gauge;labelkeys;"Temperature"]

temp:.prom.addmetric[`temperature;labelvalues;();33]

.prom.on_poll:{[msg]
  .prom.updval[temp;:;first 30 + 1?10];}

.prom.init[]