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OpenStack VM Creation Performance Issues with NetApp ONTAP Cinder Driver and Cross-Pool Cloning

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openstack
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virt
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Applies to

  • OpenStack (Red Hat OpenStack Platform 18/Antelope and similar)
  • Cinder with NetApp ONTAP Block/iSCSI/FC backend

Issue

When launching a VM from a newly uploaded image (not previously cached) in OpenStack, instance creation fails or takes excessive time (often exceeding default Nova/Cinder timeouts). This is observed as slowness during volume creation, which further delays VM provisioning.

Log output/symptoms:

  • Volume creation status remains “creating” for an extended period.
  • Cinder volume logs may show: 
    No accessible image volume for image <image_id> found...
Downloaded image <image_id> to volume <volume_id> successfully...
The NetApp Cmode ISCSIDriver volumedriver's get_volume_stats operation ran for 232.3 seconds.
  • The first VM creation from a new image fails or is very slow; subsequent VM/volume creations from the same image are fast.
  • No explicit ONTAP error codes; delays are observable in OpenStack/Cinder logs.

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