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fix(volume): stage a multi-node volume once per node - #542
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Signed-off-by: QuentinBisson <quentin@giantswarm.io>
Signed-off-by: QuentinBisson <quentin@giantswarm.io>
QuentinBisson
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Signed-off-by: QuentinBisson <quentin@giantswarm.io>
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atelet staged a read-write-many or read-only-many volume once per target, so a CSI driver that tracks its stagings (csi-driver-host-path) refused an actor's second mount of the same volume, its Session directory and the mirrors, with
volume … is already staged at …. The CSI spec allows onestaging_target_pathper volume. atelet now stages such a volume once per node at one path all its targets share, records each target that has it published beside it, and unstages it after the last one, so one actor's unmount still never unstages it under another. A staging an earlier release made per target is unstaged at its own path. csi-driver-nfs advertises no staging and is unaffected.The ledger row
existing-volume-mounted-per-actor-at-subcarries the commit.