Visual cluster simulator
Watch a real Kafka model react: leader election, ISR shrink, minISR write rejection, metadata refresh, rebalances — every cause paired with its effect.
kafkaisfun.dev
Learn Apache Kafka by breaking things — safely.
An interactive Apache Kafka learning platform: a visual cluster simulator, guided scenarios, Spring Boot recipes, practical labs, failure drills, interview prep, and an architecture planner.
One journey, not eight dashboards
Every part of the platform maps to a stage of learning Kafka properly — from first concepts to designing production clusters.
What's inside
Structured learning paths
Eight modules from fundamentals to internals, each lesson with analogies, real configs, common mistakes and a knowledge check.
Failure drills
Broker crashes, network partitions, poison messages, rebalance storms — diagnose incidents the way you would in production.
Interview preparation
220+ questions from beginner to architect level, with keyword-based evaluation that shows what your answer covered and what it missed.
Spring Boot recipes
Production-grade spring-kafka configuration: listeners, error handling, retries, DLT, transactions, testing and observability.
Hands-on labs
Step-by-step exercises that run inside the simulator, with validation criteria and the interview angle for each one.
Explore the platform
LearnUnderstandStructured lessons from fundamentals to internals, plus the Spring Boot path.PracticeImplement & PractiseInterview preparation and hands-on labs that run against the simulator.SimulateObserve, Experiment & DiagnoseA visual Kafka cluster you can break: guided scenarios, sandbox mode, failure drills.DesignDesignArchitecture planner — size partitions, brokers, storage and network with reasons.SearchFind anythingOne search across lessons, scenarios, questions, labs, failures and guidance.