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fix(shard): always orphan PVCs on scale-down instead of hard-deleting - #663
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Always orphan instead and let multigres-gc reclaim after the retention window, except when the owning MultigresCluster is being deleted, where there is nothing left to roll back to. Signed-off-by: Nicolas Nosenzo <niconosenzo@gmail.com>
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The finalizer was dropped before Shards finished deleting, so clusterIsChurning saw NotFound and orphaned PVCs on cluster teardown. Requeue until Shards, TableGroups, and Cells are gone. Signed-off-by: Nicolas Nosenzo <niconosenzo@gmail.com>
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Description
Removes the replica-count threshold that decided between orphaning a PVC (deferred deletion via multigres-gc) and hard-deleting it in-line during pool scale-down and shard removal.
Now: PVC cleanup during scale-down/drain/replace/shard-removal always orphans, unconditionally. The only case that still hard-deletes in-line is when the owning MultigresCluster itself is being deleted, at that point there's nothing to roll a scale-down back to, so there's no reason to wait out the retention window.
Changes
pvcOrphanReplicasThreshold/orphanByRemainingCount(the hard-delete-past-threshold logic) from shard_controller.go.