2026-06 Monthly Summary for cybozu-go/mantle (single-repo focus) What we delivered this month: - No new feature deliveries recorded. Major bugs fixed: - End-to-End Test CI Stability: Aligned Kubernetes version in CI configurations with the Minikube version in use (K8s v1.35.1) to improve reliability of end-to-end tests. This reduces flaky test runs and stabilizes the CI feedback loop. - Commit reference: 12d8d97adb85cf9b2cfe0239a659c18883fe61e3 ("e2e: use K8s v1.35.1 supported by the minikube in use"). Overall impact and accomplishments: - Improved CI reliability directly affecting developer efficiency and confidence in automated tests. - Reduced maintenance overhead by aligning CI with the current Minikube Kubernetes version, preventing flaky failures. - Focused, high-signal work on the core testing pipeline to accelerate validation of changes in mantle. Technologies/skills demonstrated: - Kubernetes (v1.35.1) and Minikube version alignment for CI stability - CI configuration management and end-to-end testing pipelines - Clear traceability from commit to impact, with concise, reviewer-friendly messaging

April 2026 monthly summary focusing on delivering a refreshed storage stack and improved end-to-end test diagnostics across the primary repos, cybozu/neco-containers and cybozu-go/mantle. The work emphasizes reliability, security, and operational efficiency while showcasing strong cross-team collaboration on upstream-aligned components.

Monthly performance summary for 2025-10 focusing on business value and technical achievements. Delivered Mantle Helm Chart release with a version bump to 0.3.6 and appVersion 0.7.3 to publish a new release. The change was committed as 7b64409467aca6a1ed28e75efb57b1bc8ed7af24 with Signed-off-by: Kyori Sakao. No major bugs fixed documented this period. Impact: enables stable deployments, easier upgrade paths for Mantle, and smoother downstream CI/CD workflows. Demonstrated skills include Helm chart versioning, semantic versioning, Git-based release discipline, and release automation.

June 2025 monthly summary for topolvm/topolvm focusing on business value, key features, reliability improvements, and skills demonstrated. Key features delivered include architectural consolidation of LV management and improved API surface, enabling easier extension and cleaner integration with downstream components. Major bugs fixed address volume size reporting and expansion correctness, ensuring accurate sizing is reported during CreateVolume and after expansion, and correcting NodeExpandVolume behavior for raw block devices. The month also included testing enhancements to verify exact size handling and to validate status metadata, improving confidence in automation and releases. Overall impact: more reliable volume sizing, streamlined LV management, and a maintainable, extensible codebase that reduces regression risk in future feature work. Technologies and skills demonstrated: Go-based LV management, CSI integration, refactoring for a storagePool interface, and test-driven improvements across CreateVolume, ControllerExpandVolume, and NodeExpandVolume paths.

May 2025 monthly summary for topolvm/topolvm focusing on delivered features, fixed bugs, business impact, and technical skills demonstrated. Emphasizes concrete outcomes, commit-level traceability, and value delivered to users and stakeholders.

April 2025 — cybozu-go/mantle: Delivered core features for network exposure customization, automated TLS certificate handling, enhanced end-to-end testing, and extended multi-cluster workflow reliability. Key outcomes include:

March 2025: Delivered observable improvements and versioned releases across two repos with a focus on business value, maintainability, and upgrade safety. Key outcomes include an upgraded Ceph metrics exporter with a new systemd service and Debian patch to enhance Ceph metrics collection; unification of SecondaryServer to exclusively use the client for all operations; and a controlled Mantle release with chart version 0.2.7 and app version 0.4.1. These changes simplify maintenance, improve observability, and reduce upgrade risk.