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mattyim
Cadet
Cadet
  • 3,848 Views

Openshift 4.8 vSan - ReadWriteMany

Hi Experts,

Morning, we would like to create a PV as storage to store Openshift Registry, but the requirement is "ReadWriteMany".

Do anyone know vSan can be used and defined as "ReadWriteMany"? General VMDK are "ReadWriteOnce" only.

Please help, thanks.

Matt

This question is part of the 100K Member Contest - don't forget to kudo the original contest post to be entered. 

Matt Yim
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vikash01
Mission Specialist
Mission Specialist
  • 3,794 Views

Openshift 4.8 vSan - ReadWriteMany used in term of PVC.

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AlexonOliveira
Flight Engineer
Flight Engineer
  • 3,743 Views

@mattyim, basically, no, it can't. Check the official documentation below in the "Table 2. Supported access modes for PVs" about the supported ReadWriteMany block storages:

https://docs.openshift.com/container-platform/4.8/storage/understanding-persistent-storage.html#pv-a... 

Alexon Oliveira
MarkosS
Flight Engineer
Flight Engineer
  • 3,688 Views

no there seems to be a limitation with VSphere

vSphere-volume disks are ReadWriteOnce access mode, which means the volume can be mounted as read-write by a single node. See the Access modes section of the Architecture guide for more information.

 

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Trevor
Starfighter Starfighter
Starfighter
  • 3,628 Views

Hello Matt,

My research shows that, starting with the vSphere 7.0, release 3 update, vSphere with Tanzu, supports persistent volumes in Read-Write-Many mode.

 

 

Trevor "Red Hat Evangelist" Chandler
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Walid
Flight Engineer Flight Engineer
Flight Engineer
  • 3,514 Views

I have not checked but it could via the file services which will end up to be NFS,  what cloudnative workload really needs RWX? it seems to be an anit-pattern. dependency of many nodes to share data from a single file system

~ Walid - Red Hat Accelerator, DevOps Janitor
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