nova/releasenotes/notes/libvirt-rbd-glance-multisto...

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---
features:
- |
The libvirt RBD image backend module can now handle a Glance
multistore environment where multiple RBD clusters are in use
across a single Nova/Glance deployment, configured as independent
Glance stores. In the case where an instance is booted with an
image that does not exist in the RBD cluster that Nova is
configured to use, Nova can ask Glance to copy the image from
whatever store it is currently in to the one that represents its
RBD cluster. To enable this feature, set
``[libvirt]/images_rbd_glance_store_name`` to tell Nova the Glance
store name of the RBD cluster it uses.