On 08/09/2020 13:35, Ayush Kumar wrote:
Hi Everyone,
I work with .NET Core applications and we use Prometheus along with
Grafana for dashboarding. I wanted to know if there's a way to add a
new Label to the default metrics that Prometheus has, for example:
http_requests_duration_seconds_count
This metric has a few default labels like action. I wanted to add one
more label called callerID to this for my application.
Is it possible to modify the default metrics to include new labels ?
If so, could you point me towards some documentation on how to do this ?
What is callerID?
If it is something to do with the end user calling a system then it
would be strongly advised not to have such a label - things like user
IDs, usernames or IP addresses have possibly infinite (or generally
large) cardinality and can quickly cause issues.
However if it is something to do with the service/application itself the
general approach would be to either:
1. Add such labels via relabeling in your scrape config
2. Not add the label at all, and instead use role metrics as described
at https://www.robustperception.io/how-to-have-labels-for-machine-roles
&
https://www.robustperception.io/exposing-the-software-version-to-prometheus
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