fix: Use Kafka 4.2.0 for Kubernetes example

[kabir]

Partially revert fb06d43 / #710, since now we can use https://strimzi.io/install/latest?namespace=kafka again

[gemini-code-assist]

Summary of Changes

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This pull request updates the Kafka version within the Kubernetes deployment example to 4.2.0. This adjustment ensures the example leverages a more recent Kafka release, and it also allows for a partial rollback of a prior change that was made due to an issue with the Strimzi installation link, which is now resolved.

Highlights

• Kafka Version Update: The Kafka version used in the Kubernetes example has been updated from 4.0.0 to 4.2.0.
• Partial Revert: This change partially reverts a previous commit (fb06d43b34b252ecd8df5c264e548f3eefb6edfd / #710) as the strimzi.io/install/latest?namespace=kafka link is now usable again.

Changelog

• examples/cloud-deployment/k8s/02-kafka.yaml
  • Updated the Kafka version from 4.0.0 to 4.2.0.

Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/cloud-deployment-example.yml

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[gemini-code-assist]

Code Review

This pull request updates the Kafka version in the Kubernetes example from 4.0.0 to 4.2.0. While this is a good step, the associated metadataVersion for KRaft mode has not been updated. For a new cluster deployment, this should be aligned with the Kafka version. I've added a comment with a suggestion to update this for consistency and to follow best practices.

[gemini-code-assist]

For a new cluster, the metadataVersion should be aligned with the Kafka version. Since the Kafka version is being updated to 4.2.0, the metadataVersion should also be updated to a corresponding 4.2 version (e.g., 4.2-IV0) to ensure compatibility and use the latest features.

    version: 4.2.0
    metadataVersion: 4.2-IV0

References

1. When verifying Strimzi and Kafka version compatibility, use the official Strimzi downloads page (strimzi.io/downloads) as the authoritative source, as other tools or documentation may be outdated.

[kabir]

@gemini-code-assist is the metdataVersion needed? Can I remove it?

[gemini-code-assist]

Yes, the metadataVersion is indeed needed. It specifies the version of the metadata format used by the Kafka cluster, which is particularly important when running Kafka in Kraft mode. Removing it would likely result in an improperly configured or non-functional cluster.

It's crucial to align the metadataVersion with the Kafka version to ensure compatibility and leverage the latest features and improvements in the metadata format. Therefore, keeping it updated to 4.2-IV0 as suggested is the correct approach for a Kafka 4.2.0 cluster.

[ehsavoie]

Thanks @kabir