Add Template and Blueprint support for Kafka to Iceberg

[tarun-google]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @tarun-google, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new Dataflow template designed to streamline the process of ingesting real-time data from Kafka into Apache Iceberg tables. The template provides a robust, configurable solution for streaming data, allowing users to define Kafka connection details, message formats, and Iceberg catalog and table properties. This addition enhances the data integration capabilities by enabling efficient and scalable data transfer from Kafka to Iceberg, complete with an integration test to ensure reliability.

Highlights

• New Dataflow Template: Introduced a new Dataflow template named 'Kafka to Iceberg (YAML)' for streaming data ingestion.
• Streaming Data Pipeline: The template enables a streaming pipeline that reads data from Kafka topics and writes it to Apache Iceberg tables.
• Comprehensive Configuration: Provides extensive configuration parameters for both Kafka source (e.g., bootstrap servers, topic, schema, format) and Iceberg sink (e.g., table, catalog properties, partition fields).
• Integration Testing: Includes a dedicated integration test to ensure the end-to-end functionality and reliability of the Kafka to Iceberg template.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.48%. Comparing base (52ba06f) to head (17b7120).
⚠️ Report is 18 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3097      +/-   ##
============================================
+ Coverage     50.40%   50.48%   +0.07%     
- Complexity     5021     5040      +19     
============================================
  Files           970      973       +3     
  Lines         59609    59721     +112     
  Branches       6507     6511       +4     
============================================
+ Hits          30047    30151     +104     
- Misses        27439    27442       +3     
- Partials       2123     2128       +5     

Components	Coverage Δ
spanner-templates	70.74% <ø> (+0.09%)	⬆️
spanner-import-export	68.86% <ø> (-0.13%)	⬇️
spanner-live-forward-migration	80.10% <ø> (+0.07%)	⬆️
spanner-live-reverse-replication	77.82% <ø> (+0.35%)	⬆️
spanner-bulk-migration	88.23% <ø> (-0.02%)	⬇️
see 30 files with indirect coverage changes

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[tomstepp]

Sorry if I'm missing it, but where are the iceberg options defined?

[tarun-google]

https://github.com/GoogleCloudPlatform/DataflowTemplates/blob/main/yaml/src/main/python/options/iceberg_options.yaml

[tomstepp]

Ah thanks, I was accidentally checking Apache Beam instead of GCP templates.

[tomstepp]

Can we include direct_write_byte_limit here? Maybe a default limit could be 64 MB or something.

[tarun-google]

okay, you just added this to beam 2 weeks ago, Beam release is in progress, i can wait and add this

[tomstepp]

Sounds good, thanks!