openstack multiattach

OpenStack Multi-attach

References

https://docs.openstack.org/nova/latest/admin/manage-volumes.html#volume-multi-attach https://docs.openstack.org/cinder/latest/admin/blockstorage-volume-multiattach.html http://specs.openstack.org/openstack/cinder-specs/specs/ocata/add-new-attach-apis.html

Versions Needed

• The minimum required compute API microversion for attaching a multiattach-capable volume to more than one server is 2.60.
• Cinder 12.0.0 (Queens) or newer is required.
• The nova-compute service must be running at least Queens release level code (17.0.0) and the hypervisor driver must support attaching block storage devices to more than one guest. Refer to Feature Support Matrix for details on which compute drivers support volume multiattach.
• When using the libvirt compute driver, the following native package versions determine multiattach support:
  • libvirt must be greater than or equal to 3.10, or
  • qemu must be less than 2.10
• Swapping an in-use multiattach volume is not supported (this is actually controlled via the block storage volume retype API).