Replace bitnami Kafka image with soldevelo/kafka

[igor-soldev]

Soldevelo image is a drop-in replacement that remains fully compatible with Bitnami’s configuration and environment variables.

The Bitnami Kafka image is now behind a paywall and no longer publicly available, which prevents CI/CD and local environments from functioning properly.
Switching to Soldevelo’s maintained image ensures:

• continued compatibility with existing Kafka setup,
• availability of regular updates and security patches,
• use of an image from a trusted and open source provider.

Summary by CodeRabbit

• Chores
  • Updated Kafka service volume storage configuration across all deployment environments.
  • Upgraded Kafka Docker image to a newer version for improved performance and compatibility.

[coderabbitai]

Walkthrough

Kafka Docker image and volume bindings are migrated across multiple deployment stacks and configurations. The image is updated from bitnami/kafka:3.5 to soldevelo/kafka:3.7, and volume mount targets are changed from /bitnami/kafka to /soldevelo/kafka across Linux and Windows deployment environments.

Changes

Cohort / File(s)	Summary
Docker Stack Configurations - Linux devops/linux/docker/conf/stack/docker-stack-high-0.yml, docker-stack-high-1.yml, docker-stack-low-0.yml, docker-stack-low-1.yml	Volume bind mount targets for kafka-01, kafka-02, and kafka-03 services updated from /bitnami/kafka to /soldevelo/kafka
Docker Stack Configurations - Windows devops/windows/base-docker-linux/conf/stack/docker-stack-low.yml, devops/windows/base-docker-wsl/conf/stack/docker-stack-low.yml	Volume bind mount target for kafka-01 service changed from /bitnami/kafka to /soldevelo/kafka
Image Configuration Scripts devops/windows/base-docker-linux/conf/images/conf-hub-images.sh, devops/windows/base-docker-wsl/conf/images/conf-hub-images.sh	KAFKA_IMAGE variable updated from bitnami/kafka:3.5 to soldevelo/kafka:3.7 with corresponding comment URL updates

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Consistency verification: Confirm all Kafka service references across high/low availability stacks and all Windows/Linux environments use the matching image version and volume paths
• Windows environments: Verify that both base-docker-linux and base-docker-wsl paths are correctly aligned
• Volume mount compatibility: Ensure /soldevelo/kafka path structure is compatible with the new image variant

Poem

🐰 Hopping from bitnami to soldevelo's ground,
Kafka's new home at /soldevelo/kafka is found!
Version three-point-seven, ready to flow,
All stacks aligned, from Linux to Windows below! 🥕

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Replace bitnami Kafka image with soldevelo/kafka' directly and accurately describes the main change across all modified files—replacing the Bitnami Kafka image with soldevelo/kafka.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between f5cc0ac and 28bd4b0.

📒 Files selected for processing (8)

• devops/linux/docker/conf/stack/docker-stack-high-0.yml (3 hunks)
• devops/linux/docker/conf/stack/docker-stack-high-1.yml (3 hunks)
• devops/linux/docker/conf/stack/docker-stack-low-0.yml (1 hunks)
• devops/linux/docker/conf/stack/docker-stack-low-1.yml (1 hunks)
• devops/windows/base-docker-linux/conf/images/conf-hub-images.sh (1 hunks)
• devops/windows/base-docker-linux/conf/stack/docker-stack-low.yml (1 hunks)
• devops/windows/base-docker-wsl/conf/images/conf-hub-images.sh (1 hunks)
• devops/windows/base-docker-wsl/conf/stack/docker-stack-low.yml (1 hunks)

🔇 Additional comments (4)

devops/linux/docker/conf/stack/docker-stack-low-0.yml (1)

102-120: Verify environment variable compatibility with soldevelo/kafka image.

The Kafka service still uses Bitnami-specific environment variables (BITNAMI_DEBUG, KAFKA_CFG_* prefixes) while the image is being switched to soldevelo/kafka. The PR description claims compatibility with Bitnami's configuration, but this must be verified to ensure the service initializes correctly.

To confirm soldevelo/kafka supports Bitnami-style environment variables, please:

1. Check soldevelo/kafka documentation for supported environment variable naming conventions
2. Verify the image accepts BITNAMI_DEBUG and KAFKA_CFG_* prefixed variables without modification
3. Test service startup with the new image in a staging environment

devops/windows/base-docker-linux/conf/images/conf-hub-images.sh (1)

9-10: Verify Kafka version compatibility between 3.5 and 3.7.

The PR updates Kafka from version 3.5 to 3.7 (minor version bump). Please verify:

1. The application is compatible with Kafka 3.7
2. Check Kafka release notes for breaking changes between 3.5 and 3.7
3. Verify no deprecated configuration options are used in the KAFKA_CFG_* variables

devops/linux/docker/conf/stack/docker-stack-high-1.yml (1)

101-120: Verify three-node KRaft cluster formation with soldevelo/kafka.

The docker-stack-high-1.yml file defines a three-node Kafka cluster using KRaft mode with Bitnami-specific environment variables. Please verify:

1. All three Kafka services initialize correctly with the soldevelo/kafka image
2. KRaft cluster quorum is formed successfully (KAFKA_CFG_CONTROLLER_QUORUM_VOTERS configuration works)
3. All Bitnami environment variables are supported by soldevelo/kafka
4. Inter-broker communication works correctly with the new image

Also applies to: 141-160, 181-200

devops/linux/docker/conf/stack/docker-stack-high-0.yml (1)

101-120: Verify KRaft cluster formation in high-0 stack (related to high-1 verification).

Like docker-stack-high-1.yml, this file defines a three-node KRaft cluster with Bitnami environment variables. The same verification is needed:

1. KRaft cluster quorum formation with soldevelo/kafka
2. Bitnami environment variable support across all three nodes
3. Service startup and inter-broker communication

This is a separate high-availability profile that should be tested alongside high-1.

Also applies to: 141-160, 181-200

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[igor-soldev]

Hi team! Just checking in on this PR. Since the Bitnami images are now restricted, this update - including the necessary volume path adjustments - is required to maintain a working environment.

I see this repo requires two approvals to merge. Could we get some eyes on this? All checks are green.