mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-26 16:20:28 +00:00
51 lines
2.3 KiB
Markdown
51 lines
2.3 KiB
Markdown
# RBD NBD Mounter
|
||
|
||
- [RBD NBD Mounter](#rbd-nbd-mounter)
|
||
- [Overview](#overview)
|
||
- [Configuration](#configuration)
|
||
- [Status](#status)
|
||
- [Support Matrix](#support-matrix)
|
||
- [CSI spec and Kubernetes version compatibility](#csi-spec-and-kubernetes-version-compatibility)
|
||
|
||
## Overview
|
||
|
||
The RBD CSI plugin will provision new RBD images and attach and mount those
|
||
to workloads. Currently, the default mounter is krbd, which uses the kernel
|
||
rbd driver to mount the rbd images onto the application node. Here on
|
||
at ceph-csi we will also have a userspace way of mounting the RBD images,
|
||
via RBD-NBD.
|
||
|
||
[Rbd-nbd](https://docs.ceph.com/en/latest/man/8/rbd-nbd/) is a client for
|
||
RADOS block device (rbd) images like the existing rbd kernel module. It
|
||
will map an rbd image to an NBD (Network Block Device) device, allowing
|
||
access to it as a regular local block device.
|
||
|
||
It’s worth to make a note that the rbd-nbd processes will run on the
|
||
client-side, which is inside the `csi-rbdplugin` node plugin.
|
||
|
||
## Configuration
|
||
|
||
To use the rbd-nbd mounter for RBD-backed PVs, set `mounter` to `rbd-nbd`
|
||
in the StorageClass.
|
||
|
||
## Status
|
||
|
||
Rbd-nbd support status: **Alpha**
|
||
|
||
## Support Matrix
|
||
|
||
| Features | Feature Status | CSI Driver Version | Ceph Cluster Version | CSI Spec Version | Kubernetes Version |
|
||
| ---------------------------------------- | -------------- | ------------------ | -------------------- | ---------------- | ------------------ |
|
||
| Creating and deleting snapshot | Alpha | >= v3.4.0 | Pacific (>=16.0.0) | >= v1.0.0 | >= v1.17.0 |
|
||
| Creating and deleting clones | Alpha | >= v3.4.0 | Pacific (>=16.0.0) | >= v1.0.0 | >= v1.17.0 |
|
||
| Creating and deleting encrypted volumes | Alpha | >= v3.4.0 | Pacific (>=16.0.0) | >= v1.0.0 | >= v1.14.0 |
|
||
| Expand volumes | Alpha | >= v3.4.0 | Pacific (>=16.0.0) | >= v1.1.0 | >= v1.15.0 |
|
||
|
||
`NOTE`: The `Alpha` status reflects possible non-backward compatible
|
||
changes in the future, and is thus not recommended for production use.
|
||
|
||
### CSI spec and Kubernetes version compatibility
|
||
|
||
Please refer to the [matrix](https://kubernetes-csi.github.io/docs/#kubernetes-releases)
|
||
in the Kubernetes documentation.
|