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Introducing the Experimental info() Function

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Introducing the Experimental info() Function December 16, 2025 by Arve Knudsen Enriching metrics with metadata labels can be surprisingly tricky in Prometheus, even if you're a PromQL wiz! The PromQL join query traditionally used for this is inherently quite complex because it has to specify the labels to join on, the info metric to join with, and the labels to enrich with. The new, still experime...
The article represents a significant step in improving the usability of PromQL, specifically for those adopting OpenTelemetry. However, it's important to recognize that as an experimental feature, its behavior may change or it could potentially be removed based on user feedback. The current version has some limitations, such as assuming job and instance as identifying labels and considering only targetinfo by default. These limitations might make the function unsuitable for certain scenarios, li...