Feature Overview (aka. Goal Summary)

• Add support for Google Cloud Spanner as a PostgreSQL-compatible database backend option for RHDH. Google Cloud Spanner is a fully managed, scalable, distributed relational database service that supports a PostgreSQL-compatible interface.

Goals (aka. expected user outcomes)

• Enable configure and connect to Google Cloud Spanner as the backend database
• internal documentation for setting up and configuring Google Cloud Spanner with RHDH
• Validate compatibility between RHDH and Google Cloud Spanner through manual testing

Requirements (aka. Acceptance Criteria):

• Documentation for setting up Google Cloud Spanner instance with PostgreSQL compatibility
• guide for configuring RHDH to connect to Google Cloud Spanner (db connection)
• Manual execution and validation of e2e test suite using Google Spanner connection
• high level verification that all RHDH database operations work correctly with Spanner
• Document any known limitations or differences when using Spanner vs PostgreSQL

Out of Scope (Optional)

• Automated setup/provisioning of Google Cloud Spanner instances
• Automated test coverage specific to Spanner
• Performance optimization and tuning for Spanner

Customer Considerations (Optional)

• Google Cloud Spanner requires a GCP account and proper IAM permissions
• Network connectivity requirements between RHDH and GCP