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PromQL deep dive

Check out PromQL Data Selection Explained by the one and only Julius Volz. In this 14 min YouTube video he explains how data selection in PromQL works including instant and range vector selectors, label matchers, and staleness handling.

Loki in action

Arseny Zinchenko wrote Loki: collecting logs from CloudWatch Logs using Lambda Promtail, an in-depth walkthrough.

Blackbox exporter

Blackbox Exporter: To Probe or Not to Probe asks Rita Canavarro (o11y engineer at Farfetch) and provides awesome guidance on the topic with detailed, hands-on examples. Thank you!


Ready to submit a proposal? Good news: the OpenSearchCon 2023 Call for Presentations is still open until 2023-06-09.

OTel in use at Bureau

Learn from Mohit Shukla and Nisarg Tike of Bureau via Connecting the dots with OpenTelemetry Part-II about their OpenTelemetry journey, focusing on Lambda.

Promtheus query performance

How to improve query performance in Prometheus with Cortex query frontend by Tanmay Bhat (Aviator) is an interesting contrib, sharing some insights in a hands-on manner.


Kristof Kowalski wrote krzko/run-o11y-run, providing a Docker Compose-based dev/test observability stack using OSS tooling including Grafana/Loki/Tempo, Prometheus, and OpenTelemetry. Nice!

That was it for this edition of the o11y newsletter. Feel free to share news items with me via Twitter—DMs are open if you like to share something in private. Stay safe and hope to see you around next week!