Configuring PVs on Huawei

Configuring Dynamic PVs

Mon, 01 Jan 0001 00:00:00 +0000

Dynamic volume provisioning allows storage volumes to be created on demand. Dynamic volume provisioning depends on the StorageClass objects. The cluster administrator can define multiple StorageClass objects as required and specify a StorageClass that meets service requirements when declaring a PV or PVC. When applying for resources from Huawei storage devices, Huawei CSI creates storage resources that meet service requirements based on the preset StorageClass.

Configuration Description

Perform the following steps to configure and use dynamic PVs:

Configuring a Static PV

Mon, 01 Jan 0001 00:00:00 +0000

Static volume provisioning allows administrators to use a resource created on the storage side as a PV for containers in the cluster.

Configuration Description

Perform the following steps to configure a static PV:

Preparation
Configuring a PV
Configuring a PVC
Using a PVC

Preparation

A storage resource, such as a LUN or file system, required by the PV to be created exists on the storage device. If the storage resource is a file system, you also need to create the share and client information of the file system.

Managing PVs

Mon, 01 Jan 0001 00:00:00 +0000

Manage Volume Provisioning allows administrators to use resources created on storage as PVs and supports features of dynamic volumes, such as capacity expansion, snapshot, and clone. This is a custom capability of Huawei CSI. This feature applies to the following scenarios:

In the reconstruction containerized applications, existing storage volumes need to be used.
The Kubernetes cluster is rebuilt.
Storage data is migrated in disaster recovery (DR) scenarios.

Manage Volume Provisioning allows existing storage resources to be managed by Kubernetes. You are not allowed to manage a storage resource for multiple times and concurrently delete or create a storage resource. When a storage resource is managed by multiple clusters, operations on the managed volume in a single cluster take effect only in the cluster and will not be synchronized to other clusters. Instead, you need to perform these operations on the managed volume in other clusters. For example, when you expand the capacity of a PVC in a cluster, the capacity of the corresponding PVC in other clusters will not be automatically expanded. In this case, you need to manually expand the capacity in other clusters by running the expansion commands in Expanding the Capacity of a PV .

When managing PVs, ensure that the PVs comply with the storage class declaration. Otherwise, Huawei CSI may fail to manage the PVs. For example, when you manage a common PV, the storage backend of the HyperMetro type is referenced in the storage class, and the HyperMetro parameter is enabled. After the PV is managed, if you clone the PV or create a PV based on a snapshot, Huawei CSI will fail to execute the operation.

Configuration Description

Perform the following steps to manage and use PVs: