https://valyala.medium.com/how-to-use-relabeling-in-prometheus-and-victoriametrics-8b90fc22c4b2 https://www.robustperception.io/controlling-the-instance-label/
https://grafana.com/blog/2022/03/21/how-relabeling-in-prometheus-works/
https://prometheus.io/docs/concepts/jobs_instances/#:~:text=In%20Prometheus%20terms%2C%20an%20endpoint,example%2C%20is%20called%20a%20job.