longhorn/longhorn

Features

• Kubernetes Storage Orchestration - Provides a distributed block storage system and orchestrator for managing persistent volumes in Kubernetes.
• Block Storage - Provides a distributed block storage system for persistent volumes across Kubernetes clusters.
• Point-In-Time Snapshots - Captures point-in-time, immutable views of volumes for rapid recovery and consistent reads.
• CSI Driver Implementations - Acts as a Kubernetes CSI driver to enable dynamic provisioning and attachment of block volumes.
• Synchronous Replication Management - Ensures immediate consistency and fault tolerance by requiring confirmation from multiple replicas before committing writes.
• Replicated Block Volumes - Maintains synchronously replicated block volumes across multiple nodes to ensure high availability.
• Distributed Replica Orchestration - Manages volume replicas as independent engine processes that synchronously replicate writes across nodes.
• Persistent Storage Volumes - Connects block storage volumes to specific pods to make data available for processing.
• Replicated Persistent Volumes - Creates persistent volumes that synchronously replicate block data across multiple nodes for high availability.
• Storage Volume Orchestration - Implements automated provisioning and mounting of persistent block storage to containerized workloads.
• CRD-Based Resource Management - Provides a Kubernetes-native control plane that manages storage volumes and replicas using custom resource definitions.
• CSI Driver Implementations - Exposes block storage volumes to Kubernetes through the Container Storage Interface standard for dynamic provisioning.
• Kubernetes Controllers - Uses Kubernetes controllers and CRDs to manage the distributed state of storage volumes and replicas.
• Storage Replica Recovery - Automatically reattaches and rebuilds volume replicas when a cluster node becomes unavailable.
• Object Storage Backups - Provides the ability to export volume snapshots to external S3 or NFS targets for off-cluster disaster recovery.
• Volume Snapshot and Clone Engines - Implements an engine for capturing point-in-time volume states and creating independent clones.
• Snapshot Rollbacks - Rolls back a volume to a previous point-in-time state using a stored snapshot.
• Disaster Recovery Workflows - Provides automated workflows for exporting volume backups to external S3 or NFS targets for disaster recovery.
• Differencing Snapshot Chains - Stores volume snapshots as a chain of read-only differencing layers for instant rollback and efficient backups.
• Access Mode Management - Coordinates shared read-write access for a single block volume across multiple pods simultaneously.
• Object Storage Volume Exports - Serializes volume snapshots to external object storage targets for off-cluster disaster recovery.
• Management Dashboards - Provides a dedicated dashboard to create, attach, snapshot, backup, and delete persistent volumes.
• Image-Based Provisioning - Provisions persistent volumes by extracting block data from container images for rapid deployment.
• Read-Only Access Modes - Allows multiple nodes to read from a single volume concurrently while preventing write operations.
• Read-Write-Many Block Storage - Provides shared read-write access to a single block volume across multiple pods simultaneously.
• Placement Optimizations - Optimizes the placement of data replicas across nodes based on scheduling strategies for efficiency.
• Local Disk Aggregation - Aggregates physical disks on individual cluster nodes into storage pools for replica placement.
• Backup Job Scheduling - Schedules recurring backup jobs to copy volume snapshots to external storage targets at defined intervals.
• Zero-Downtime Engine Upgrades - Allows transitioning volumes to newer data engine versions without requiring application downtime.
• Storage Pool Health Monitors - Tracks volume capacity, IOPS, and replication status through specialized storage pool health monitors.
• Node Storage Pooling - Manages physical disks on each Kubernetes node as storage pools for placing volume replicas.

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