February 2026 Monthly Summary for deckhouse/virtualization: Key features delivered: - Evacuation reliability improvements with backoff for failed VM operations: Implemented a backoff mechanism to avoid creating VM operations (vmop) for failed VMIs during node drainage. The backoff scales with the number of failed VM operations, improving evacuation efficiency and reliability while reducing unnecessary VMOP churn. - End-to-end tests for ClusterNetwork-only VMs: Added end-to-end coverage for Virtual Machines configured with an additional ClusterNetwork without the default Main network interface to validate networking configurations and resilience. Major bugs fixed: - Migration and resource lifecycle stability fixes: Correctly clear the Migrating condition and gracefully handle NotFound errors during status updates in the reconciler, preventing reconciliation failures when resources are deleted concurrently. - Commits: fix(vm): migration condition clearing; fix(core): ignore NotFound error during updating status in reconciler. Overall impact and accomplishments: - Improved stability and reliability of the lifecycle management for VM resources, especially during migrations and concurrent deletions. - Increased resilience of cluster evacuation workflows during node drainage, reducing failed evacuations and VMOP churn. - Expanded test coverage for networking scenarios, helping validate and protect against regressions in VM networking configurations. Technologies/skills demonstrated: - Kubernetes operator patterns (MigratingHandler, reconciler) and robust error handling for NotFound during status updates. - Backoff strategies for workload evacuation and VMOP management. - End-to-end testing practices for complex networking configurations (ClusterNetwork, absence of Main interface). - VM operations (vmop) lifecycle, cluster networking, and test automation. Business value: - Fewer reconciliation failures and operational interruptions during concurrent resource deletions. - More reliable VM evacuation in drainage scenarios, reducing downtime during maintenance windows. - Higher confidence in networking configurations for VMs in clusters with non-default network setups.

January 2026 — deckhouse/virtualization. Delivered quota accounting improvements and a module upgrade to improve quota accuracy and reliability. Key features include: (1) Excluding hotplug pods from quota accounting to prevent system resource usage from inflating user quotas; (2) Adding quota-exclusion labels for VI/CVI importer pods and their scratch PVCs to ignore temporary resources during VD/VI/CVI creation; (3) Applying a quota discount for virt-launcher pods to exclude VM overhead from quota calculations; (4) Upgrading the Deckhouse module to a newer version to ensure compatibility and access to latest fixes.

Month: 2025-12 — Focused on expanding VM lifecycle capabilities, strengthening test coverage, stabilizing VM operations, and improving observability. Delivered multiple cross-cutting features across VMSOP/VMOP, fixed a critical block device permission issue, and enhanced ecosystem metrics. The changes reduce regression risk, enable downtime-free operations, and improve monitoring and data importer capabilities.

Month 2025-11 Summary for deckhouse/virtualization: Delivered a VM cloning workflow from snapshots via the VirtualMachineSnapshotOperation CRD, including client interfaces and a testing harness with fake clients. Introduced a per-controller priority queue to optimize task handling and improve throughput. Hardened operation reliability with targeted fixes (audit logging, restore redundancy checks). Stabilized test suite by temporarily disabling VMBDA in VMRestore tests to address restoration issues. These changes collectively improve VM provisioning speed, deletion efficiency, audit accuracy, and overall stability, reducing risk in production workflows.

October 2025 monthly summary focusing on key accomplishments and business value across deckhouse/virtualization and deckhouse/CLI. Highlights include standardizing code quality checks with golangci-lint alias rules, refining audit logging for module control events, stabilizing fuzz testing infra, expanding CI testing scope, and upgrading the virtualization library for the CLI. Deliveries span multiple repos with targeted fixes and improvements that reduce risk, improve observability, and enable reliable feature work.

September 2025 monthly work summary focusing on delivering robust VM lifecycle capabilities in deckhouse/virtualization, with a strong emphasis on business value and automation.

August 2025: Three core features delivered in deckhouse/virtualization, with a strong emphasis on reliability, observability, and upgrade readiness. Key outcomes include refactored CLI Console and VNC handling, deprecation cleanup and compatibility updates for VolumeSnapshot with the snapshot-controller, and enhanced VM access audit logging with stage context. These changes reduce operational risk, improve security visibility, and streamline maintenance and upgrades across the virtualization module.

July 2025 — deckhouse/virtualization: Security hardening, reliability, and expanded end-to-end testing drove tangible business value. Key work includes fuzzing inactivity timeout to reduce wasted resources, CDI/StorageClass integration hardening, container read-only filesystem enforcement, audit controller TLS hardening, and enhanced virtualization/snapshot end-to-end tests with Ubuntu-based images. Snapshot CRD simplification was also completed to streamline user experience and delegating snapshot logic to the controller.

Month: 2025-06. This period focused on modularizing the virtualization stack, hardening components, and tightening build reproducibility. Key accomplishments include consolidating the virtualization module by relocating the v command from deckhouse-cli to deckhouse/virtualization with corresponding imports and dependencies updates; introducing fuzz testing for the dvcr-uploader to improve robustness and security; upgrading deckhouse images to v0.5.8 and refreshing build configuration (werf.inc.yaml) to set fromCacheVersion to 19.06.2025.1, along with updated SHA256 checksums. In addition, build reliability and maintainability were improved through ongoing dependency management and cross-repo collaboration. Notably, there were no explicit user-visible bug fixes in this month, but the work delivers improved stability, security, and reproducibility, enabling faster, safer deployments.

May 2025: Delivered foundational virtualization capabilities with improved security observability, VM management, and build stability. Core dependency integration enables a stable virtualization stack; audit subsystem with TLS/log-shipper improves security and observability; expanded VM management via a feature-rich CLI and enhanced VNC handling; VMClass readiness reliability improved with NodesWatcher; testing infrastructure hardened for CI reliability; cross-repo alignment fixed audit policy group naming to ensure correct event attribution.

April 2025 monthly summary: delivered significant virtualization stack improvements and governance enhancements across two repositories, focusing on business value, reliability, and operational visibility. Key work included exposing hypervisor versions for monitoring, hardening uploader stability, EFI Windows boot fix, E2E test infrastructure improvements, build tooling enhancements, and auditing for virtualization operations.

March 2025: The virtualization module (deckhouse/virtualization) delivered a dynamic VM CPU topology feature with sockets calculated from the number of cores (capped at 8), updated API definitions, controller logic, and documentation to support the new topology. Also fixed correctness gaps in CPU core validation, corrected an end-to-end test description typo, and aligned topology-related docs/schema. This work improves resource utilization predictability, reduces misconfigurations, and strengthens test coverage.

February 2025 — Performance summary for deckhouse development Key features delivered: - VirtualImage creation from VirtualDiskSnapshot: API/CRD/controller updates enabling creation of VirtualImage from a snapshot; includes objectRef support and end-to-end test coverage. - Bounder image enhancements: added CMD instruction support, finalizer, and streamlined handling of VirtualImage and VirtualDiskSnapshot; removes temporary DVCR PVC to simplify provisioning. - Network policy hardening for DVCR components: added NetworkPolicy for Importer pod and integrated policy creation in UploaderService to maintain access under restrictive namespaces. - TLS certificate generation refactor to module SDK Go hooks: migrated TLS cert generation from Python to Go hooks, generating certificates for controller, DVCR, API, and API proxy. Major bugs fixed: - Provisioning fix for VI/CVI from VDSnapshot with immediate storage: robust error handling for the "pod has unbound immediate PersistentVolumeClaims" scenario during provisioning. - Console stdin input capture: deckhouse-cli fixed to ensure the first character from stdin is not dropped in interactive console sessions. Overall impact and accomplishments: - Increased reliability and predictability of image provisioning and DVCR workloads, reducing operational risk. - Strengthened security and isolation with targeted network policies and streamlined TLS certificate management. - Improved CI reproducibility through bounder image digest tracking, accelerating feedback and stabilizing releases. - Demonstrated strong Go-based module tooling and Kubernetes-native patterns (CRDs, controllers, hooks) enabling faster future automation. Technologies/skills demonstrated: - Go-based module SDK hooks for TLS certificates; removal of Python tooling. - Kubernetes CRDs, controllers, and network policies. - End-to-end testing and CI reliability practices.

January 2025 monthly summary for deckhouse/virtualization: Key efforts focused on reliability and data-source flexibility in virtual image management. Delivered a critical bug fix for Virtual Image provisioning and status synchronization, ensuring correct handling of VI provisioning and image size/status updates and improving Kubernetes conditions to accurately reflect the readiness of the virtual disk. Also implemented the capability to create a ClusterVirtualImage from a VirtualDiskSnapshot by extending ClusterVirtualImageObjectRef to accept VirtualDiskSnapshot as a valid source type and updating controller logic to support the new data source. These changes enhance provisioning reliability, reduce manual remediation, and enable snapshot-based CVI workflows. Technologies demonstrated include Kubernetes CRD/controller work, status condition improvements, and data-source extension for CVIs.

December 2024: Focused on reliability, maintainability, and observability across virtualization workflows, delivering remote access stability improvements, enhanced VM lifecycle telemetry, and targeted bug fixes. The work also drove codebase modularity, clearer readiness signals, and improved disk resizing handling, contributing to higher uptime and faster contributor onboarding. Notable CLI resilience enhancements also shipped to ensure stable user sessions.

Month: 2024-11 — This period delivered foundational virtualization APIs, improved observability, and enhanced VM lifecycle tooling, driving reliability, faster troubleshooting, and developer efficiency. Key features delivered: - CRD-based virtualization API for images and disks (ClusterVirtualImage, VirtualImage, VirtualDisk) with updated validation and cross-namespace/resource management. - Unified logging across virtualization components by migrating to the Deckhouse logger with per-controller verbosity controls for easier troubleshooting. - Improved VM agent status reporting with clearer readiness and support status reasons. - Code organization and environment variable consolidation to improve maintainability. - Kubernetes StorageClass selection robustness: use the newest default by sorting by creation timestamp and name. - Build process/platform improvements: specify linux/x86_64 platform in Docker builds to ensure compatibility with M1 Macs. - Deckhouse CLI VM operation lifecycle enhancements: granular wait behavior, createOnly option, functional options pattern, and improved status reporting for VM operations. Major bugs fixed: - StorageClass selection robustness fix to ensure the newest default is used. Overall impact and accomplishments: - Improved resource management across cluster and namespace boundaries, enabling safer provisioning of virtual resources. - Enhanced observability and troubleshooting through standardized logging and per-controller verbosity. - Better VM lifecycle control and status visibility, accelerating incident resolution and user feedback cycles. - Maintained build and deployment parity across architectures (M1 Mac compatibility) and streamlined code maintenance. Technologies/skills demonstrated: - CRD design and Kubernetes API conventions, namespace-aware validation, and CRD generation. - Logging standardization and observability improvements across distributed controllers. - VM agent status modeling and actionable readiness reasons. - Refactoring for maintainability and environment variable management. - Build tooling awareness for cross-architecture development (linux/x86_64, M1 Mac support). - Functional options pattern and improved CLI UX for VM operations.