Best practices to using "xxxxx_info" gauge metric

[Rajat Jindal]

hello community folks,

what do people think about publishing _info metrics with static labels.

e.g. xxxxxx_info{"foo"=bar, "foo2"=bar2} with constant value of 1 as gauge metrics (where foo and foo2 are some static metadata associated with a single instance).

is there any documented best practices around having (or not having) such metrics published?

Thank you

Rajat Jindal

[Brian Candler]

Yes, it's good practice and you can read about it here:

https://www.robustperception.io/how-to-have-labels-for-machine-roles
https://www.robustperception.io/exposing-the-software-version-to-prometheus

You may also find these relevant:

https://www.robustperception.io/left-joins-in-promql
https://prometheus.io/docs/prometheus/latest/querying/operators/#many-to-one-and-one-to-many-vector-matches