Storage Performance Development Kit driver

Storage Performance Development Kit (SPDK) is a user space, polled-mode, asynchronous, lockless NVMe driver. It provides zero-copy, highly parallel access directly to an SSD from a user space application. SPDK provides NVMe-oF target that is capable of serving disks over the network or to other processes.

Preparation

SPDK NVMe-oF target installation

Follow instructions available on https://spdk.io/doc/nvmf.html to install and configure environment with SPDK NVMe-oF target application.

Storage pools configuration

SPDK Cinder driver requires storage pools to be configured upfront in SPDK NVMe-oF target application. SPDK driver uses Logical Volume Stores (LVS) as storage pools. Details on configuring LVS are available on https://spdk.io/doc/logical_volumes.html. After storage pools are configured remote access has to be enabled. Launch scripts/rpc_http_proxy.py script from SPDK directory to start an http server that will manage requests from volume driver.

Supported operations

  • Create, delete, attach, and detach volumes.

  • Create, list, and delete volume snapshots.

  • Create a volume from a snapshot.

  • Copy an image to a volume.

  • Copy a volume to an image.

  • Clone a volume.

  • Extend a volume.

  • Get volume statistics.

Configuration

Use the following options to configure for the SPDK NVMe-oF transport:

volume_driver = cinder.volume.drivers.spdk.SPDKDriver
target_protocol = nvmet_rdma          # SPDK driver supports only nvmet_rdma target protocol
target_helper = spdk-nvmeof           # SPDK volume driver requires SPDK NVMe-oF target driver
target_ip_address = 192.168.0.1       # NVMe-oF target IP address
target_port = 4260                    # NVMe-oF target port
target_prefix = nqn.2014-08.org.spdk  # NVMe-oF target nqn prefix
Description of SPDK configuration options

Configuration option = Default value

Description

spdk_rpc_ip = None

(String) The NVMe target remote configuration IP address.

spdk_rpc_password = None

(String) The NVMe target remote configuration password.

spdk_rpc_port = 8000

(Port(min=0, max=65535)) The NVMe target remote configuration port.

spdk_rpc_username = None

(String) The NVMe target remote configuration username.