OCP OCS with VMware supported?

[Ricardo]

Does anyone know if RH officially supports OCS with VMware storage backend? It works, it's documented in the community and in the reference architecture, but I couldn'f find any reference in the official documentation. 

[beelandc]

Can you elaborate a bit?

Are you asking if OpenShift Container Storage  (also known as OCS, which is essentially a hyperconverged configuration of Gluster) can be installed with OpenShift, running on top of VMWare?

Or if you can use VMWare storage integrations to provide PV storage for a cluster? Like: https://docs.openshift.com/container-platform/3.11/install_config/persistent_storage/persistent_stor...

[oldbenko]

Hey, @beelandc,

I think what Ricardo means is one of the OCI standards, the one related to storage interface called CSI, which has been promoted to GA in K8S 1.13.

Using CSI, it is possible to provision, and attach, storage in a standardised way across different providers (in this case, vSphere volumes).

Cheers,
Grega

[Ricardo]

I want to know if Red Hat supports StorageClass (dynamic provision of Persistent Volumes) with VMware storage (not glusterfs). Which is described in the documentation and the implementation works. 

[oldbenko]

Hey, @Ricardo

As far as I can see, yes:

• Tested Integrations document says vSphere is OK since 3.6
• Cluster Configuration Guide tells you how to do it in 24.2.3 - Configuring OCP to use vSphere (specifically, 24.2.3.2 for StorageClass)

I don't think this is CSI though. There is no CSI provisioner for vSphere as far as I know.

Cheers,
Grega

[Ricardo]

Hi @oldbenko 

According to docs.openshift.com, there is a provisioner, and that's why I'm asking if it is supported officially by Red Hat, when used in production. 

cheers

[oldbenko]

Yeah, there is a provisioner, but it's not a CSI-compliant provisioner. It's just your good old-fashioned storage class provisioner. It works though, and it has, since OCP 3.6.

[oldbenko · Accepted solution]

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@oldbenko wrote:

Yeah, there is a provisioner, but it's not a CSI-compliant provisioner. It's just your good old-fashioned storage class provisioner. It works though, and it has, since OCP 3.6.

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...by which I mean it is supported. The fact it is listed in the Tested Integrations page is quite definite proof of support.

Cheers,
Grega