I have a GoLang middleware for exporting metrics for prometheus, which are then served from /metrics endpoint
My question is where does the data received from /metrics endpoint come from?
Does it come from the memory?
Exporter link: https://github.com/labstack/echo-contrib/tree/master/prometheus
Yes, the last state of the metrics are stored in memory of the scraped target. Most of the implementation of prometheus metrics are built with this library in go programs: https://github.com/prometheus/client_golang
Your scraped target won't hold the whole time serie, it's prometheus role to store these values across time.
