14 Jul 2026
Release
Kafka Simulator v1.1: Understanding Kafka Producer Semantics
5 minKafka Simulator v1.1 adds ten scenarios covering producer batching, partitioning, compression, backpressure, retries, and idempotence.
№ 01 / Writing
Notes
from the team.
07 Jul 2026
Observability
Kafka client metrics over OTLP — one more piece of the puzzle
7 minKIP-714 lets Kafka clients push their own metrics to brokers over OTLP. monedula-metrics-reporter now forwards those metrics too, next to broker SPI and Yammer metrics.
24 Jun 2026
Education
Kafka is easier to understand when you can break it
9 minKafka's most important lessons live in the transitions: before and after a broker dies, before and after the ISR shrinks. We built a browser-based simulator so you can break a cluster safely and watch exactly why it reacts the way it does.
17 Jun 2026
Migration
From Kafka ACLs to Confluent RBAC: A Safe Migration Path with a New Open-Source Tool
11 minMoving an existing Kafka estate from ACLs to Confluent RBAC is a risk-management exercise, not a syntax conversion. Here's a safe, auditable, repeatable migration workflow — and the tool we built for it.
26 May 2026
Observability
Do Kafka metrics have to be so difficult?
7 minWhy Kafka metrics are painful, why JMX dashboards often show no data, and how to export Kafka metrics natively over OTLP.