46a16f1d61
Background: Given 3PAR backend configured with replication setup, currently only Active/Passive replication is supported by 3PAR in OpenStack. When failover happens, nova does not support volume force-detach (from dead primary backend) / re-attach to secondary backend. Storage engineer's manual intervention is required. Proposed Solution: Given a system with Peer Persistence configured and replicated volume is created. When this volume is attached to an instance, vlun would be created automatically in secondary backend, in addition to primary backend. So that when a failover happens, it is seamless. This solution would apply under following conditions: 1] multipath is enabled 2] replication mode is set as "sync" 3] quorum witness is configured Closes bug: #1839140 Change-Id: I2d0342adace69314bd159d3d6415a87ff29db562
Cinder Reference Documentation (source/reference)
Introduction:
This directory is intended to hold any reference documentation for Cinder that doesn't fit into 'install', 'contributor', 'configuration', 'cli', 'admin', or 'user' categories.
The full spec for organization of documentation may be seen in the OS Manuals Migration Spec <https://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html>.