rbd recover tool for stopped ceph cluster

rbd recover tool for stopped ceph cluster

[minchen]

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rbd recover tool  is an offline tool to recover rbd image when ceph cluster is stopped.
It is usefull when you want to recover rbd image on a broken ceph cluster in urgent.  
    I have used a similar prototype tool succeessfully recovering a large rbd image in ceph cluster whose scale is 900+ osds. So I think this tool can help us to keep rbd data security.
    Before you runing this tool, just make sure to stop all ceph services: ceph-mon, ceph-osd, ceph-mds.
    Currently, this tool supports both raw image and snapshot, and clone image will be supported sooner.


    there is the pull request
    https://github.com/ceph/ceph/pull/3611‍

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