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The Kafka Migration tool

Maintainability

Build Status

If you're a developer building Kafka Streams applications or an devops responsible of operating an Apache Kafka cluster you certainly have the need of moving changes between stages.

How should I move changes in Schema Registry from staging to production? How should we manage the creation, deletion or config topic changes when deploying a new Kafka Application (Streams, Connector or just a simple Consumers/Producers app) all the way to production?

All this fairly common problems every team finds.

A classical solution to this is to maintain a yaml, that the teams change to request changes and the CI/CD infrastructure is in charge to setup.

The way the Kafka Migration tool (yeah, I did not work much on the naming) propose to solve this problem is using migrations. Let's have the flywaydb of Apache Kafka.

NOTE: This project is in active development, api's and feature sets are in constant evolution.

The CLI

This project is available as a CLI, with a set of current command available:

➜  kafka-migration-tool git:(master) ✗ ./bin/kafka-migration-tool.sh --help
Error: Unknown option --help
Usage: Kafka Migration Tool [migrate|migrate:up|migrate:down|clean] [options]

  -b, --brokers url <value>
                           Kafka brokers location
  -s, --schema-registry url <value>
                           Schema Registry destination url
  -m, --migrations url <value>
                           Where to find the stored migrations
Command: migrate
apply all migrations sequencially
Command: migrate:up
apply a selected migration change request
Command: migrate:down
remove a selected migration change request
Command: clean
clean command

Components supported

As of the current version, the Kafka Migration tool support:

  • Change Request to the Confluent Schema Registry
  • Change Request to topic management.

In the future, it will support as well:

  • Change Request for ACL's
  • Change Request for users, ....

Willing to use the Kafka Migration tool?

If you would like to use the kafka migration tool, there are a few options available for you:

Building from the source code

To build from the source code you will need sbt and scala 2.13 available in your environment. This commands will be helpful for you:

  • sbt clean assembly : this will generate a far jar with all necessary code and dependencies packaged
  • sbt test: will run the test suite available

generated packages will be available for you in the target/ directory.

Download a pre-packaged release

Currently available packages are ready for you in the release page, feel free to download them and use it.

Check out the wiki for more documentation

For more information on how to use the migration tool, please check the wiki

Contributing

All contributions are welcome: ideas, patches, documentation, bug reports, complaints, etc!

Programming is not a required skill, and there are many ways to help out! It is more important to us that you are able to contribute.

That said, some basic guidelines, which you are free to ignore :)