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Every post filed under “prometheus”, newest first.
4 posts.
Pushkar Kumar 10 min read
Why provisioned Grafana dashboards say Datasource ${DS_PROMETHEUS} was not found, how to find every placeholder with jq, and four fixes that survive CI.
Pushkar Kumar 10 min read
A target vanished or a label disappeared after relabeling. Debug Prometheus relabel_configs vs metric_relabel_configs, regex anchoring and keep/drop logic.
Pushkar Kumar 10 min read
A field reference for all 11 Prometheus relabel actions — replace, keep, drop, labelmap, labeldrop, hashmod, keepequal, lowercase — each with an example.
Pushkar Kumar 5 min read
A PromQL query reads inside out, not left to right. The four layers — selectors, ranges, functions and aggregations — so you can decode any expression fast.