Concise monthly summary for 2026-04 focused on delivering observability, security enhancements, and CI reliability to support scalable routing deployments. Highlights include end-to-end improvements to per-route routing robustness, security around sticky sessions, enhanced routing observability, and a major uplift in CI/test stability to reduce flakiness in CI pipelines and ensure faster feedback loops for developers and product teams.

March 2026: Delivered key routing enhancements in cloudfoundry/routing-release focused on session persistence, CHIPS migration compatibility, hash-based routing, and overall quality. Achieved measurable improvements in session integrity, routing reliability, and developer/docs/test reliability, laying a foundation for scalable load balancing and easier maintenance.

February 2026 monthly summary for routing-related work. Focused on delivering high-value, reliable features and strengthening governance. Implemented session affinity enhancements with VCAP_ID Max-Age > 0 for improved session handling and JSESSIONID synchronization, backed by expanded tests. Introduced YAML-based routing configuration and test scaffolding to standardize acceptance tests, databases, and APIs, improving reliability and maintainability of the routing infrastructure. Strengthened governance by appointing Clemens Hoffmann as Networking approver to accelerate reviews and decisions. Overall, these efforts increased session reliability for customers, reduced test flakiness, and clarified ownership across routing and networking domains.

January 2026 monthly summary: Delivered Hash-Based Routing with Load Balancing Validation in sap-contributions/cloud_controller_ng, enabling hash-based routing with options hash_header and hash_balance, with robust validations, error handling, and observability; extended route creation/update to support new options; added tests and improved error messaging; centralised validation logic in route model; enhanced logging for routing decisions and manifest processing.

September 2025 (cloudfoundry/routing-release): Focused on reliability and observability. Implemented a bug fix to guarantee Dropsonde reporter initialization logs are emitted regardless of EnableEnvelopeV1Metrics, while maintaining the existing conditional behavior of the Prometheus reporter. This change reduces startup logging gaps, improves post-incident debugging, and stabilizes monitoring for routing-release deployments.

Month: 2025-07 — Key observability enhancement in cloudfoundry/routing-release: reduced log verbosity for redundant route/endpoint unregistrations by moving from INFO to DEBUG and added tests to ensure debug logs appear only when debug is enabled. No major bugs fixed this month. This work improves diagnostic clarity and reduces log store costs while preserving critical information for troubleshooting.

February 2025: Delivered cross-repo load-balancer naming standardization from 'least-connections' to 'least-connection' across cloudfoundry/routing-release and sap-contributions/cloud_controller_ng. This included code changes, documentation updates, and test adjustments to enforce consistency. The changes reduce misconfiguration risk, improve maintainability, and streamline future refactors. Notable commits: f731cc7b4ee202db4fe18a8bb4f87375841d76b4, 06ccba34c426488995a1243ce5101e480763a161.

Monthly summary for 2024-12: Delivered the Cloud Controller API Per-Route Options feature for sap-contributions/cloud_controller_ng, enabling per-route traffic configuration and future policy-based routing. Implemented a new 'options' field on routes with support for load balancing algorithms (round-robin, least-connections). Includes database schema changes, API endpoint updates, and updated documentation. This release lays the groundwork for scalable, configurable routing and improved fault tolerance. Commit reference: 05e617f86440859059e7d4782ddf022d6ef52f7b (Implement per-route options in Cloud Controller (#4080)).