2026-03-23¶

Dry-run mode for OTel collector¶

Simon Aronsson wrote about Building a dry-run mode for the OpenTelemetry Collector, allowing you to validate the impact of filter changes before deploying.

OpenSearch and OTel¶

If you are wondering how OpenSearch uses and benefits from OpenTelemetry, check out otel.opensearch.org.

OpAMP deep dive¶

One of my personal fav OTel projects is OpAMP, a protocol that enables you to automatically deploy, configure, and monitor a fleet of (telemetry) agents. Learn more about it in Dotan Horovits' recent episode of OpenObservability where he has OpAMP maintainer Andy Keller as a guest: Operating OpenTelemetry at Scale with OpAMP.

OTel end-user Mastodon¶

Always good to learn from practitioners, in this case, via the official OTel blog: How Mastodon Runs OpenTelemetry Collectors in Production by Juliano Costa, Tristan Sloughter, Johanna Öjeling, Damien Mathieu, and Tim Campbell.

Severity-based log routing¶

The one and only Juraci Paixão Kröhling on Severity-Based Log Routing with the OpenTelemetry Collector, awesome read, as expected!

Policies¶

Introducing Policies by Jacob Aronoff explains how this new portable pieces of configuration enable real-time controls for users.

That was it for this edition of the o11y newsletter. Feel free to share news items with me via Bluesky DM. Stay safe and hope to see you around next week!