Month: 2026-04 | Repository: longhorn/longhorn-manager. This month focused on reliability, stability, and measurable business value by implementing a safety net for snapshot management, hardening NFS backups against slow/unreliable NFS servers, and tightening test correctness. The changes improve operator stability, reduce run-away process blocking, and increase confidence in automated reconciliations in production environments.

In March 2026, the Longhorn Manager team delivered reliability and UX improvements for orphaned resource cleanup and Manager URL configuration. Key changes include ensuring the correct instance manager is referenced during cleanup, addressing orphaned resource cleanup failures, and adding a warning in the Manager URL settings to alert users about potential issues with middleware (e.g., OAuth2 proxies). These changes reduce resource leaks, improve deployment reliability, streamline troubleshooting, and enhance user guidance.

Summary for 2026-02 (longhorn/longhorn-manager): Delivered two substantive capabilities that improve reliability, governance, and observability of storage management. The work emphasizes business value through compliant snapshot governance and enhanced operational visibility, while also strengthening debugging and incident response capabilities. Key context: Month focused on Volume Snapshot Management Enhancements and Cleanup Logging Improvements for Backing Images in longhorn-manager.

January 2026 (2026-01) highlights: Improved test reliability, targeted performance optimizations, and CI quality across Longhorn repositories, with a focus on business value and technical rigor. Key outcomes include automated test reliability enhancements for Pod recreation validation and Vagrant execution context, targeted disk SMART scanning to reduce monitoring overhead, CI testing improvements for filtering and coverage merging, and DNS/service discovery hardening to stabilize Kubernetes networking.

Monthly summary for 2025-12: Focused on increasing migration reliability and resolving Kubernetes naming constraints to improve production stability and business value.

Monthly performance summary for 2025-11 focusing on business value and technical achievements for longhorn/longhorn-manager. The key delivery this month was a targeted bug fix in the CSI block volume path to validate bind mount points, enhancing reliability and accessibility of mounts across Kubernetes clusters. This directly reduces runtime errors, improves provisioning stability, and supports smoother customer workloads in production environments.

October 2025 Monthly Summary focusing on the Longhorn Manager (longhorn-manager) contributions. The month centered on increasing reliability and observability in the node publish path of the CSI workflow, with a targeted fix to address error shadowing and improve troubleshooting visibility.

September 2025 monthly summary for longhorn-manager: Focused on stabilizing core lifecycle features, improving reliability, and enabling UI-ready data. Delivered API/UI enhancements, strengthened orphan cleanup, fixed scheduling race conditions, tightened configuration validation, and streamlined upgrade flows. These changes reduce deployment risk, improve resource hygiene, and provide clearer operational visibility.

August 2025 monthly summary for Longhorn project delivered enhancements across longhorn-instance-manager and longhorn-manager with a focus on reliability, data integrity, and upgrade stability.

June 2025 monthly summary for longhorn-manager: Strengthened operational safety, cleanup reliability, and observability through targeted fixes and feature work across eviction handling, uninstall workflows, and migration attachment validation.

May 2025 monthly summary focusing on stabilizing orphan resource management, safe deletions, and expanded failure-mode testing across Longhorn repositories. Achievements include consolidating orphan handling, enabling UUID-based safe deletion, and enhancing E2E test coverage for outage scenarios. Fixed critical deadlocks and retry loops, delivering measurable business value through safer lifecycle management, improved reliability, and higher test coverage.

April 2025 monthly summary: Strengthened stability and reliability across Longhorn test and manager components by fixing test environment dependencies, hardening orphan-resource lifecycle management, and updating critical vendor dependencies. Delivered concrete improvements in two repositories, driving CI robustness and safer Kubernetes interactions.

March 2025 monthly summary focusing on key features delivered, major fixes, impact, and technologies demonstrated for longhorn-manager and longhorn-tests. Highlights include Kubernetes CRD API migration, code quality and tooling improvements, expanded end-to-end testing capabilities, and validated upgrade paths that reduce risk for customers. 1) Key features delivered: - Longhorn Manager: Migrate CRDs from v1beta1 to v1beta2, deprecate v1beta1, and align Go code and YAML with newer Kubernetes versions and Longhorn releases. - Upgraded tooling and code quality: Consolidated upgrade logic, enhanced code generation tooling, improved linting, and streamlined CI scripting to boost maintainability and reliability. - Longhorn Tests: Added manual CRD migration verification test for the 1.9.0 upgrade to validate v1beta1 -> v1beta2 migration and post-upgrade storage versions. - End-to-end testing: Introduced Vagrant host provider support in the E2E framework to enable testing against Vagrant-managed hosts. 2) Major bugs fixed: - Reduced K8s upgrade code complexity and eliminated unnecessary error noise in CI/test tooling, improving reliability of upgrades across versions. - Generalized Kubernetes code generation to reduce future churn during Kubernetes API evolution. 3) Overall impact and accomplishments: - Improved compatibility with newer Kubernetes releases, reducing upgrade risk for customers. - Strengthened test coverage for CRD migrations and end-to-end scenarios, increasing confidence in release stability. - Improved developer experience and maintainability through CI enhancements, linting, and code-gen improvements. 4) Technologies/skills demonstrated: - Kubernetes CRD lifecycle (v1beta1 -> v1beta2), Go code updates, and YAML adjustments. - Code quality practices: linting, code generation, and upgrade tooling. - Test automation: manual CRD migration tests and E2E test framework expansion with Vagrant integration. - CI/CD improvements and reliability engineering.

February 2025 monthly summary focusing on key accomplishments across longhorn-manager and longhorn-instance-manager. 1) Key features delivered - longhorn-manager: CI/CD pipeline enhancement for self-contained container images using buildx; introduces tag-determination logic based on Git tags/branches; unifies binary build and image packaging into a streamlined workflow. - longhorn-instance-manager: Self-contained, multi-architecture container image CI/CD pipeline; refactored GitHub Actions workflows and Makefile to centralize build info collection, standardize multi-arch image creation (AMD64/ARM64), and simplify manifest images; improved binary placement in Dockerfile and removed redundant workflow steps to resolve CI issues. 2) Major bugs fixed - longhorn-manager: Fix PROJECT variable handling in CI/CD packaging; defines PROJECT as 'longhorn-manager' and ensures the project name is passed to scripts/package step to prevent misnamed builds/pushes. - longhorn-instance-manager: Fix binary dependency for local build; correct binary placement in Dockerfile; removing redundant CI steps to ensure the longhorn-instance-manager binary is built when missing. 3) Overall impact and accomplishments - Increased build reliability and reproducibility across both repos; faster, more reliable container image generation across architectures; reduced risk of misnamed artifacts and packaging inconsistencies; streamlined manifest image creation and CI workflows to support faster releases. 4) Technologies/skills demonstrated - Buildx-powered self-contained images, GitHub Actions CI workflows, Makefile refactoring for centralized build info, Dockerfile optimization for binary placement, multi-architecture image support (AMD64/ARM64), and tag/branch-based release tagging.

December 2024: Delivered reliability improvements and safety checks across Longhorn components, with a focus on robust environment validation, data integrity, and test coverage for RWX configurations. Key work: - Implemented robust environment validation and OS handling in longhorn-manager to ensure reliable deployments across distributions by validating NFS protocol, detecting required components without system package managers, and skipping checks on unsupported OSes. - Enforced data integrity by rejecting non-migratable StrictLocal RWX volumes via webhook logic, preventing invalid storage configurations. - Strengthened test coverage for RWX validation by adding a targeted compatibility test to catch misconfigurations early. Overall impact: Reduced deployment failures due to environment discrepancies, prevented invalid volume configurations that could compromise data integrity, and increased confidence in releases through automated validation and test coverage.