The Longhorn team is excited to announce the release of Longhorn v1.10.0, a major milestone focused on stability, performance, and ease of management. This version delivers significant improvements to the V2 Data Engine, unified configuration handling, and enhanced observability across the system.

Performance Matters: V2 Data Engine Enhancements

Longhorn v1.10.0 introduces several key upgrades to the V2 Data Engine:

• Interrupt Mode: The new interrupt mode automatically reduces CPU usage during idle or light workloads, improving efficiency without compromising responsiveness.

• Controlled Replica Rebuilding: Replica rebuilding now supports QoS controls, allowing administrators to limit rebuild bandwidth and avoid resource contention during peak loads. This ensures smoother recovery and more predictable performance under heavy usage.

• Flexible and Fast Cloning: Cloning is now faster and more versatile. You can choose between full-copy clones, which create fully independent volumes for complete isolation, and linked clones, which share data blocks with the source volume for near-instant creation. It is ideal for temporary workloads, backups, or testing. In addition, Longhorn now supports online expansion for V2 volumes, enabling seamless capacity increases without downtime.

• Hugepages Not Required: The V2 Data Engine can now run without hugepages, simplifying deployment on smaller or mixed-purpose nodes while maintaining performance and stability.

Configurations Made Simple: Unified Settings Across Engines

Longhorn v1.10.0 introduces a consistent global settings format that applies to both V1 and V2 data engines. Using a standardized JSON structure, administrators can now manage configurations more easily and automate tasks across engines with reduced complexity.

Networking Evolves: IPv6 Support

With Kubernetes adoption of IPv6 on the rise, Longhorn now supports single-stack IPv6 environments. This update aligns Longhorn with modern networking standards and lays the groundwork for future dual-stack capabilities.

Smarter Scheduling, Cleaner Backups

Integration with Kubernetes CSIStorageCapacity enables more accurate, storage-aware volume scheduling. Backups are now more configurable, with adjustable block sizes that allow administrators to optimize for speed or storage efficiency based on workload requirements.

Cleaning House: Removing Deprecated APIs

To improve maintainability and future-proof the system, this release removes the deprecated longhorn.io/v1beta1 API and the unused replica.status.evictionRequested field. These changes streamline the codebase and provide a clean foundation for future development.

Get in touch

As always, these improvements are the direct result of community feedback and collaboration. If you’re new to Longhorn or open source, remember: every contribution counts, and your voice matters. Join the conversation on the CNCF #longhorn Slack channel or GitHub discussions and let us know how you’re using Longhorn v1.10.0!