May 2026 focused on observability governance in deckhouse/deckhouse. Delivered deprecation notice for CustomPrometheusRule with migration guidance toward ObservabilityMetricsRulesGroup or ClusterObservabilityMetricsRulesGroup, enabling cleaner upgrade paths and long-term maintainability. Formalized ownership by adding Maksim Madzhuga as code owner for the observability 460 module, improving review flow and maintenance accountability. These changes reduce user confusion, align with future architecture, and strengthen ongoing sustainability of the observability stack.

January 2026 monthly summary for deckhouse/deckhouse focused on observability enhancements and maintainability improvements. Delivered new Kubernetes recording rules to improve visibility into file descriptor utilization and persistent volume states, with refactoring of existing rules for clarity and easier future maintenance. Implemented new YAML configurations to support these enhancements and added propagated recording rules to broaden observability coverage across components.

December 2025: Delivered Prometheus Observability Rules Propagation and Organization for deckhouse/deckhouse. Propagated existing rules into new modular files, improving structure, maintainability, and clarity of alerting. This reduces rule duplication, simplifies updates, and speeds incident response. No major bugs fixed this month. Overall impact: stronger observability, faster troubleshooting, and better governance of monitoring rules. Technologies/skills: Prometheus, rule management, code organization, collaborative development, sign-off hygiene (Co-authors).

November 2025 delivered a focused observability enhancement in deckhouse/lib-helm. Implemented Prometheus Metrics Rules for Enhanced Observability, enabling propagated metrics rules to support granular visibility across deployment contexts. This strengthens monitoring, alerting, and capacity planning, improving operational efficiency and reliability. Work completed with a single patch (b0da2dd42ea5632069a85dd9fb27d376ccb5683a), signed off by Maksim Madzhuga.