https://ypereirareis.github.io/blog/2020/02/21/how-to-join-prometheus-metrics-by-label-with-promql/
#prometheus #join
#prometheus #join
Yannick Pereira-Reis
How to join Prometheus metrics by label with PromQL
When aggregating metrics from many sources or exporters in a Prometheus database, we often need to JOIN metrics on labels.