Azure StorageClass in Azure Kubernetes Service (AKS)

From Microsoft

In AKS data storage capability is provided by Azure storage. You can use it via Azure Disk or Azure Files.

• Azure Disks — Mounted as ReadWriteOnce, so are only available to a single pod. For storage volumes that can be accessed by multiple pods simultaneously, use Azure Files.
• Azure Files can be used to mount an SMB 3.0 share backed by an Azure Storage account to pods. Files can be shared across Nodes and Pods.

Azure storage redundancy helps you to store multiple copies of data as per your requirement. You requirement depends on your disaster management planning. This redundancy of data can be categorized on following types at a very high level -

Primary region redundancy -

1. Locally redundant storage (LRS)
2. Zone-redundant storage (ZRS)

Secondary region redundancy -

1. Geo-redundant storage (GRS)
2. Geo-zone-redundant storage (GZRS)

According to that following skuName are available in Azure —

• Standard_LRS — standard locally redundant storage (LRS)
• Standard_GRS — standard geo-redundant storage (GRS)
• Standard_ZRS — standard zone redundant storage (ZRS)