June 2026 — Concise monthly summary across Stolostron repos focusing on reliability, configurability, and testing enhancements. Key features delivered - stolostron/multicluster-observability-operator: Automated cleanup of ScrapeConfigs and PrometheusRules during MCOA → MCO transition, with unit tests validating the undeploy logic. Extended MultiCluster Observability CR to support additional Thanos Compact flags/settings for debugging and tuning. - stolostron/observatorium-operator: Thanos Compact Argument Merge for Configurability allowing user-defined CLI args to override defaults. - stolostron/kube-rbac-proxy: End-to-End testing framework with CI improvements; Docker image compatibility upgrades for prometheus-example-app; Distroless/non-CGo build enablement; TLS certificate validity and integrity fixes. Major bugs fixed - Improve accuracy of Prometheus policy report violation alerts across clusters. - TLS certificate validity and integrity fixes (Kube RBAC Proxy TLS cert updates). Overall impact and accomplishments - Increased reliability during MCOA→MCO upgrades, improved alert accuracy, and reduced operational drift. - Enhanced configurability of Thanos Compact, enabling faster debugging and tuning in production. - Expanded testing coverage (unit and end-to-end) and CI reliability, enabling safer deployments. - Improved security and maintainability of container images through non-CGo builds and TLS fixes. Technologies/skills demonstrated - Go, Kubernetes Operators, Prometheus/Thanos, CRDs, unit and end-to-end testing, CI/CD integration, Docker/distroless builds, TLS management.

May 2026 focused on stabilizing observability metrics and improving reliability for the stolostron/multicluster-observability-operator. Delivered two high-impact bug fixes, enhanced testing and diagnostics, and demonstrated solid execution in Prometheus-based metric handling and Kubernetes operator code. The changes improve data accuracy, reduce dashboard duplication, and strengthen the observability platform across multiple clusters.