Document PostgreSQL 18 support for RDI

[ZdravkoDonev-redis]

What changed

• Add PostgreSQL 18 to the shared RDI supported source database matrix.
• Add PostgreSQL 17 and 18 to the AWS RDS PostgreSQL matrix.
• Keep the Software RDI and Redis Cloud RDI public documentation aligned.

Why

A customer evaluating RDI on Redis Cloud uses AWS RDS PostgreSQL 18.3, while the public documentation stopped at PostgreSQL 16 for AWS RDS and PostgreSQL 17 for general RDI. RDI's current Debezium version supports PostgreSQL 18, and the RDI end-to-end suite uses PostgreSQL 18.4. PostgreSQL engine behavior does not differ for this compatibility point when hosted on AWS RDS.

User impact

Customers can confirm from the public support matrix that PostgreSQL 18, including AWS RDS PostgreSQL 18, is supported by RDI.

Validation

• git diff --check
• Full Hugo build with the CI-pinned Hugo 0.143.1 (hugo --gc --minify)

The build completed successfully with two existing unrelated REF_NOT_FOUND warnings under the Redis Software flex documentation.

---

Note

Low Risk
Documentation-only updates to version matrices with no runtime or configuration changes.

Overview
Updates the public RDI source-database compatibility tables so PostgreSQL 18 appears in the general version list and PostgreSQL 17 and 18 appear for AWS RDS PostgreSQL.

The shared embed rdi-supported-source-versions.md and the Redis Cloud RDI prerequisites table in operate/rc/rdi/_index.md are changed together so both entry points show the same supported versions.

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[github-actions]

Staging links:
https://redis.io/docs/staging/agent/rdi-postgresql-18-docs/integrate/redis-data-integration/
https://redis.io/docs/staging/agent/rdi-postgresql-18-docs/integrate/redis-data-integration/architecture/
https://redis.io/docs/staging/agent/rdi-postgresql-18-docs/integrate/redis-data-integration/data-pipelines/prepare-dbs/
https://redis.io/docs/staging/agent/rdi-postgresql-18-docs/integrate/redis-data-integration/installation/reqsummary
https://redis.io/docs/staging/agent/rdi-postgresql-18-docs/operate/rc/rdi/

[github-actions]

🧠 Redis Memory

Found 5 related items from repository history:

• PR — Document Supabase support for RDI

  What changed

• PR — Document Supabase support for RDI

  What changed

• PR — DOC-6475 updated RDI supported sources

  This is the latest info for Debezium 3.4. Let me know if the AWS/GCP product versions also need to be updat

• Commit — DOC-6878 Expand RDI FAQ CDC section with all supported databases

  DOC-6878 Expand RDI FAQ CDC section with all supported databases

• PR — RDI 1.18.1 release notes

  Summary

Memory updated at 335215c

[andy-stark-redis]

LGTM