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Importing a PV to a Storage Pool

Updated on 2024-01-26 GMT+08:00

CCE allows you to use LVM to combine data volumes on nodes into a storage pool (VolumeGroup) and create LVs for containers to mount. Before creating a local PV, import the data disk of the node to the storage pool.

Constraints

  • Local PVs are supported only when the cluster version is v1.21.2-r0 or later and the everest add-on version is 2.1.23 or later. Version 2.1.23 or later is recommended.
  • The first data disk (used by container runtime and the kubelet component) on a node cannot be imported as a storage pool.
  • Storage pools in striped mode do not support scale-out. After scale-out, fragmented space may be generated and the storage pool cannot be used.
  • Storage pools cannot be scaled in or deleted.
  • If disks in a storage pool on a node are deleted, the storage pool will malfunction.

Importing a Storage Pool

Imported during node creation

When creating a node, you can add a data disk to the node in Storage Settings and import the data disk to the storage pool as a PV. For details, see Creating a Node.

Imported manually

If no PV is imported during node creation, or the capacity of the current storage volume is insufficient, you can manually import a storage pool.

  1. Go to the ECS console and add a SCSI disk to the node.
  2. Log in to the CCE console and click the cluster name to access the cluster console.
  3. In the navigation pane, choose Storage and switch to the Storage Pool tab.
  4. View the node to which the disk has been added and select Import as PV. You can select a write mode during the import.

    NOTE:

    If the manually attached disk is not displayed in the storage pool, wait for 1 minute and refresh the list.

    • Linear: A linear logical volume integrates one or more physical volumes. Data is written to the next physical volume when the previous one is used up.
    • Striped: A striped logical volume stripes data into blocks of the same size and stores them in multiple physical volumes in sequence, allowing data to be concurrently read and written. Select this option only when there are multiple volumes.

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