Alexey Serbin has posted comments on this change. ( http://gerrit.cloudera.org:8080/20814 )
Change subject: Add blog post about Prometheus/Grafana ...................................................................... Patch Set 2: Code-Review+1 (3 comments) Thank you for revving the patch! http://gerrit.cloudera.org:8080/#/c/20814/1/_posts/2023-12-18-kudu-prometheus-grafana.md File _posts/2023-12-18-kudu-prometheus-grafana.md: http://gerrit.cloudera.org:8080/#/c/20814/1/_posts/2023-12-18-kudu-prometheus-grafana.md@24 PS1, Line 24: > I agree with Alexey that we should document the current capability limits i I posted my original comment on PS1 in January 2024. As of July 2026 the tablet-level metrics are now available in Prometheus format since KUDU-3563 had been implemented and then refined with KUDU-3692. IIUC, with KUDU-3563 and KUDU-3692 implemented, tablet-level metrics are available in Prometheus format. The --prometheus_use_entity_labels flag controls the way they are represented in the output. Please correct me if I'm wrong. In this context, I'd also consider informing the reader that --prometheus_use_entity_labels stays 'false' by default due to backward compatibility reasons, and it's necessary to tweak the flag to allow for natural aggregation of the metrics. http://gerrit.cloudera.org:8080/#/c/20814/2/_posts/2026-07-03-kudu-prometheus-grafana.md File _posts/2026-07-03-kudu-prometheus-grafana.md: http://gerrit.cloudera.org:8080/#/c/20814/2/_posts/2026-07-03-kudu-prometheus-grafana.md@20 PS2, Line 20: web UI web server http://gerrit.cloudera.org:8080/#/c/20814/2/_posts/2026-07-03-kudu-prometheus-grafana.md@21 PS2, Line 21: aggregation Does it make sense to mention tweaking --prometheus_use_entity_labels flag to enable various levels of aggregation for the exposed metrics? I'd also think of mentioning that the current default value of --prometheus_use_entity_labels is chosen to preserve backwards compatibility with the legacy naming scheme of the Kudu's metrics in Prometheus format. I guess it's also worth it recommending to set --prometheus_use_entity_labels=1 when starting from scratch, i.e. if there aren't any components that expect the legacy format of the Kudu's metrics exposed in Prometheus format. -- To view, visit http://gerrit.cloudera.org:8080/20814 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: gh-pages Gerrit-MessageType: comment Gerrit-Change-Id: I85878378f883b2cc1f8136bde2c9f0db7ceccd8f Gerrit-Change-Number: 20814 Gerrit-PatchSet: 2 Gerrit-Owner: Marton Greber <[email protected]> Gerrit-Reviewer: Alexey Serbin <[email protected]> Gerrit-Reviewer: Attila Bukor <[email protected]> Gerrit-Reviewer: Gabriella Lotz <[email protected]> Gerrit-Reviewer: Marton Greber <[email protected]> Gerrit-Reviewer: Yan-Daojiang <[email protected]> Gerrit-Reviewer: Zoltan Chovan <[email protected]> Gerrit-Comment-Date: Mon, 06 Jul 2026 22:34:30 +0000 Gerrit-HasComments: Yes
