What are the steps to add an OSD back to a Ceph cluster?

Solution Verified - Updated -


  • One of the OSDs were removed from the Ceph cluster using the steps below, where ${id} is the numeric ID of the OSD removed:

    1. Remove the OSD from the Crush map

      # ceph osd crush remove osd.${id}
    2. Remove the OSD from the OSD listing

      # ceph osd rm ${id}
    3. Remove the OSD's authentication keys

      # ceph auth del osd.${id}
  • This OSD needs to be re-added to the cluster.

  • ceph-deploy disk lists shows the disk as prepared.
  • Running ceph-deploy osd activate ${osd-node}:${device} changed the OSD status to ACTIVE.
  • ceph -s does not show the new OSD as part of the ceph cluster.


  • Red Hat Ceph Storage 1.2.3
  • Red Hat Ceph Storage 1.3

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