Container Storage Interface support matrix
This appendix provides information about the IBM Container Storage Interface (CSI) driver compatibility and requirements. The supported Red Hat OpenShift access modes for persistent storage are also listed.
This matrix reflects the supported environment at the time of this writing.
This appendix includes the following topics:
IBM block storage CSI driver compatibility and requirements
More information about IBM block storage CSI driver compatibility and requirements are listed in the IBM block storage CSI driver documentation, which is available at this IBM Documentation web page.
This information specifies the compatibility and requirements of version 1.3.0 of IBM block storage CSI driver for the following topics:
•Supported storage systems
IBM block storage CSI driver 1.3.0 supports different IBM storage systems as listed in Table B-1.
Table B-1 CSI driver supported storage systems
|
Storage system
|
Microcode version
|
|
IBM FlashSystem A9000/R
|
12.x
|
|
IBM Spectrum Virtualize Family
|
7.x, 8.x
|
|
IBM Spectrum Virtualize as software only
|
7.x, 8.x
|
|
IBM DS8000 Family
|
8.x and higher with same API interface
|
•Supported operating systems
The operating systems that are required for deployment of the IBM block storage CSI driver are listed in Table B-2.
Table B-2 CSI driver supported operating systems
|
Operating system
|
Microcode version
|
|
Red Hat Enterprise Linux (RHEL) 7.x
|
x86
|
|
Red Hat CoreOS (RHCOS)
|
x86, IBM Z
|
|
Red Hat CoreOS (RHCOS)
|
•IBM Power
•IBM Power architecture is supported on Spectrum Virtualize Family storage systems only
|
•Supported orchestration platforms
The orchestration platforms that are suitable for deployment of the IBM block storage CSI driver are listed in Table B-3.
Table B-3 CSI driver supported orchestration platforms
|
Orchestration platform
|
Version
|
Architecture
|
|
Kubernetes
|
1.17
|
x86
|
|
Kubernetes
|
1.18
|
x86
|
|
Red Hat OpenShift
|
4.3
|
IBM Z
IBM Power with Spectrum Virtualize Family storage systems
|
|
Red Hat OpenShift
|
4.4
|
x86, IBM Z
|
|
Red Hat OpenShift
|
4.5
|
x86,
|
For more information about the release notes and user guide, see this IBM Documentation web page.
Always check this web page for the most current CSI driver updates and new compatibility and requirement information.
Red Hat OpenShift access modes for persistent storage
A PersistentVolume can be mounted on a host having one of the access modes that are listed in Table B-4.
Table B-4 Access modes
|
Access mode
|
CLI abbreviation
|
Volume can be mounted as
|
|
ReadWriteOnce
|
RWO
|
Read-write by a single node
|
|
ReadOnlyMany
|
ROX
|
Read-only by many nodes
|
|
ReadWriteMany
|
RWX
|
Read/write by many nodes
|
This paper describes the attachment for Fibre Channel (FC) attached storage. Therefore, the information that is listed in Table B-5 is reduced to the FC support. OpenShift Container Platform versions 4.3, 4.4, and 4.5 support the same access mode, as shown in Table B-5.
Table B-5 Supported access modes for PersistentVolumes
|
Volume plug-in
|
ReadWriteOnce
|
ReadOnlyMany
|
ReadWriteMany
|
|
Fibre Channel
|
Yes
|
Yes
|
No
|
ReadWriteOnce (RWO) volumes cannot be mounted on multiple nodes. If a node fails, the volume is still assigned to the failed node and cannot be mounted on another node. To make the volume available to another node, you might need to recover or delete the failed node.
For more information, see the OpenShift documentation that is available at this web page.
Red Hat OpenShift CSI volume snapshot support
CSI volume snapshot is an Red Hat OpenShift Container Platform Technology Preview feature only. For more information, see this web page.
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