Managing external storages

Besides the local compute storage, you can integrate your compute cluster with a third-party storage compatible with OpenStack. This will allow you to use an enterprise-grade storage solution, as well as isolate storage from your compute nodes.

OpenStack provides multiple drivers for different storages. A set of available operations on volumes is limited by the driver capabilities and can be checked in the Cinder Driver Support Matrix.

Limitations

• The currently supported storages only include those that use the Pure Storage iSCSI Driver and Generic NFS Reference Driver.
• We do not recommend running virtual machines with volumes created from external NFS storage on compute nodes in the hyperconverged mode. In other words, such VMs should be hosted on nodes with the compute services only.
• Volumes with external storage cannot be reverted from snapshots.
• Volumes with external NFS storage cannot be extended.