Bare-metal CSI Driver

Bare-metal CSI Driver is a CSI spec implementation to manage locally attached disks for Kubernetes.

• Project status: GA

Features

• Dynamic provisioning: Volumes are created dynamically when PersistentVolumeClaim objects are created.
• Volume binding modes
  • WaitForFirstConsumer
• Generic ephemeral volumes (k8s v1.21+)
• LVM support
• Storage classes for the different drive types: HDD, SSD, NVMe
• Drive health detection
• Scheduler extender
• Support unique ID for each node in the K8s cluster
• Service procedures - node and disk replacement
• Volume expand support
• Raw block mode
• Ability to deploy on subset of nodes within cluster
• CSI Operator

Planned features

• User defined storage classes
• NVMeOf support
• Kubernetes Scheduler
• SMART Self Test execution
• Volume cloning
• Support of additional Linux distributions/versions

Related repositories

• Bare-metal CSI Operator - Kubernetes Operator to deploy and manage CSI
• Bare-metal CSI Scheduling - Kubernetes Scheduler and Scheduler Extender to guarantee correct pod placement

Installation process

Installation process is documented in Bare-metal CSI Operator

Upgdare process

Upgrade process is documented in Bare-metal CSI Operator

High level architecture

Bare-metal CSI driver consists from the following components:

• Operator - responsible for CSI deployment and lifecycle (upgrade, node add/remove, etc.)
• Scheduler extender - handles filter and score requests coming from scheduler, requests capacity reservation from Controller service
• Scheduler patcher - automates scheduler configuration patching, optional component
• Controller service - handles Create/Delete/Expand Volume requests
• Node service - handles Volume Stage/Unstage, Publish/Unpublish requests
• Drive manager - discovers locally attach disks (drives)
• Node controller - maintains persistent node IDs

Contribution

Please refer Contribution Guideline fo details