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The data path for SPDK volumes is established through spdk_tgt. To upgrade spdk_tgt without downtime, the bdev raids of attached volumes must be live migrated to the new spdk_tgt.

Subtasks

• [IMPROVEMENT] Replace engineImage field in CRDs with image #6647
• [IMPROVEMENT] Do not start any instance-manager pods for the v2 data engine on a node if one is already running #8456
• [IMPROVEMENT] Record instance-manager name for a block disksin node.spec.diskStatus #8458
• [IMPROVEMENT] Fall back to a running instance-manager if a default is not available #8464

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