Openshift 4.8 vSan - ReadWriteMany

[mattyim]

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

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[vikash01]

Openshift 4.8 vSan - ReadWriteMany used in term of PVC.

[AlexonOliveira]

@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... 

[MarkosS]

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.

[Trevor]

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.

[Walid]

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