PowerFlex: collegamento di un volume a più host in OpenStack (--multi-attach)
Summary: I tentativi di creare un volume OpenStack Cinder multi-attachable (utilizzando lo switch --multi-attach), utilizzando ScaleIO come back-end, hanno esito negativo.
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Symptoms
Scenario
Un utente sta tentando di creare un volume ScaleIO tramite OpenStack Cinder, utilizzando il --multi-attach . Ad esempio:
openstack volume create --size 16 --multi-attach testvol
Sintomi
Messaggi simili ai seguenti vengono registrati da OpenStack Cinder in cinder-scheduler.log:
DEBUG cinder.scheduler.filters.capabilities_filter [req-1f20b775-4ce2-4f97-a0cf-7326aed3e6674a018cd43cde479e8f18bb7e11c157ee d0ad4f70bec34caa8900bac2fceb6b7d - - -] Host doesn't provide capability 'multiattach' _satisfies_extra_specs /usr/lib/python2.7/dist-packages/cinder/scheduler/filters/capabilities_filter.py:54
DEBUG cinder.scheduler.filters.capabilities_filter [req-1f20b775-4ce2-4f97-a0cf-7326aed3e6674a018cd43cde479e8f18bb7e11c157ee d0ad4f70bec34caa8900bac2fceb6b7d - - -] host 'hyper-converged001@scaleio#default:default': free_capacity_gb: 24531, pools: None fails resource_type extra_specs requirements host_passes /usr/lib/python2.7/dist-packages/cinder/scheduler/filters/capabilities_filter.py:72
Impatto
In un'ambiente OpenStack, non è possibile collegare lo stesso volume ScaleIO a più host.
Cause
Il driver ScaleIO OpenStack attualmente non supporta Cinder --multi-attach opzione, in quanto OpenStack, in particolare Nova, non supporta ancora completamente la funzione.
Il supporto potrebbe essere fornito in una versione futura del driver.
Resolution
Creare volumi separati e collegare ciascuno a un host.
Article Properties
Article Number: 000158996
Article Type: Solution
Last Modified: 14 Aug 2025
Version: 5
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