The lag chart goes up and nobody knows why.
55 Kafka entries with the part every other cheat sheet leaves out — why you reach for it, and the specific way it bites you. Complete configs, client snippets and a KRaft compose file you can run locally.
This is for you if…
- Consumer lag is climbing and nobody can say which of four causes it is
- The consumer group rebalances constantly and processing never finishes
- acks, idempotence and retries get argued about without anyone stating the trade-off
- Messages you expected in order arrived out of order
- A client connects fine and then every produce times out
- Someone said "exactly once" in a meeting and nobody corrected them
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- handbook.pdf — 55 entries across 8 sections, 69 pages
- wall-sheet.pdf — the whole toolkit on one page, built for printing
- examples/ — 55 ready-to-use files, one per entry, grouped by section
- Complete, validated artefacts for Apache Kafka 3.x — copy and adapt
- A mental-model paragraph opening every section
- "Watch out" on every entry — the specific way each one bites people
- "See also" on every entry — the related flags worth knowing next
- Licence covering commercial use of every example file
- Free updates to the 2026 edition
- Format
- ZIP · 772 KB
- License
- Single-user license
- Version
- 1.0 · updated 25 Sep 2026
- Delivery
- Instant download
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Download right after checkout in your Library.
ZIP files · 772 KB. Clear usage terms.
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About this product
Kafka is easy to start and hard to run. Consumer lag climbs and nobody can say whether the consumers are slow, rebalancing, or stuck. Someone suggests adding partitions. Someone else suggests acks=0. Both are guesses.
Most cheat sheets do not help with that, because a list of flags tells you what to type and never why. This one is built the other way round. Every entry answers four questions:
What it does — one sentence, in plain English.
Why you reach for it — the model underneath, so the next command becomes obvious instead of needing another search.
What it looks like — a complete, self-contained example.
How it bites you — the specific mistake people actually make with this one.
Every example is a complete artefact, not a fragment — the kind you copy into a project and adapt, rather than a half-line you still have to look up. Syntax is checked against the official documentation for Apache Kafka 3.x, and every YAML and JSON block was validated by parsing it. These were not executed on a live environment, and the handbook says so on every one of them rather than pretending otherwise.
55 entries across 8 sections:
01 — The mental model
02 — Topics
03 — Producing
04 — Consuming
05 — Consumer groups and offsets
06 — Delivery guarantees and common failure modes
07 — Operating a cluster
08 — Schemas, connectors and the ecosystem
What you get:
handbook.pdf — 55 entries, 69 pages, a mental-model paragraph opening every section
wall-sheet.pdf — the whole toolkit on one printable page, built to live next to your monitor
examples/ — 55 ready-to-use files, one per entry, grouped by section
Your own licence — the example files are yours to use in your own work, including paid client work
Written for developers and students who have to run, feed or read a Kafka cluster and want the mental model as well as the flags.
How it works
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Questions people ask before buying
How is this different from the free Kafka cheat sheets online?
Free cheat sheets are lists. They tell you what to type and nothing else, which is why you end up looking the same thing up every few weeks. Every entry here explains why you would reach for it and how it goes wrong, and every section opens with the model behind it. That is the part that makes it stick.
Is this for beginners?
No, and it does not pretend to be. It assumes developers and students who have to run, feed or read a Kafka cluster and want the mental model as well as the flags — if you have never written any Kafka, start with a tutorial and come back.
Were the examples actually tested?
Honestly, no — and the handbook says so on every entry. Kafka needs a live environment that a build machine does not have, so these are marked reference throughout: complete, copy-pasteable artefacts checked against the official Apache Kafka 3.x documentation, with every YAML and JSON block validated. Four other handbooks in this series were executed for real. We label which is which rather than quietly inventing output.
What exactly do I get after I pay?
A single zip with four things: handbook.pdf (69 pages), a printable one-page wall sheet, an examples/ folder with 55 ready-to-use files, and your licence. Instant download, no waiting.
Can I use the example files in my own projects?
Yes. The licence covers using, modifying and building on every example file in your own projects and in paid client work. The only thing you cannot do is resell the handbook itself.
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