Madhu Rajanna 68bd44beba rbd: add new controller to regenerate omap data ... In the case of Disaster Recovery failover, the user expected to create the static PVC's. We have planned not to go with the PVC name and namespace for many reasons (as in kubernetes it's planned to support PVC transfer to a new namespace with a different name and with new features coming in like data populator etc). For now, we are planning to go with static PVC's to support async mirroring. During Async mirroring only the RBD images are mirrored to the secondary site, and when the user creates the static PVC's on the failover we need to regenerate the omap data. The volumeHandler in PV spec is an encoded string which contains clusterID and poolID and image UUID, The clusterID and poolID won't remain same on both the clusters, for that cephcsi need to generate the new volume handler and its to create a mapping between new volume handler and old volume handler with that whenever cephcsi gets csi requests it check if the mapping exists it will pull the new volume handler and continues other operations. The new controller watches for the PVs created, It checks if the omap exists if it doesn't it will regenerate the entire omap data. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>		2020-11-28 18:50:00 +00:00
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persistentvolume.go	rbd: add new controller to regenerate omap data	2020-11-28 18:50:00 +00:00