Bug 1891024

Summary:	[DDF] For OCS clusters with service capacity of 4TiB a custom storage class should be generated with cachingmode:none.
Product:	[Red Hat Storage] Red Hat OpenShift Container Storage	Reporter:	Direct Docs Feedback <ddf-bot>
Component:	documentation	Assignee:	Anjana Suparna Sriram <asriram>
Status:	NEW ---	QA Contact:	Elad <ebenahar>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	4.5	CC:	swilson
Target Milestone:	---	Flags:	etamir: needinfo? (shilpsha)
Target Release:	---
Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Direct Docs Feedback 2020-10-23 14:53:09 UTC

For OCS clusters with service capacity of 4TiB a custom storage class should be generated with cachingmode:none. Otherwise, the deviceset pods with remain in pending with an error message concerning the acces mode. A note should be added here to address that issue.

Reported by: rhn-gps-swilson

https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/4.5/html/deploying_and_managing_openshift_container_storage_using_microsoft_azure/deploying-openshift-container-storage-on-microsoft-azure_azure#annotations:ae1308ac-0a62-411f-9b47-bd4f43a6f143

Comment 3 swilson 2021-08-09 13:54:57 UTC

Example storage class definition:

```
provisioner: kubernetes.io/azure-disk
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: managed-premium-over4ti
parameters:
  kind: managed
  storageaccounttype: Premium_LRS
  cachingmode: None
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer

```

Comment 4 swilson 2021-08-09 13:55:27 UTC

Example storage class definition:

```
provisioner: kubernetes.io/azure-disk
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: managed-premium-over4ti
parameters:
  kind: managed
  storageaccounttype: Premium_LRS
  cachingmode: None
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer

```