Creating Ceph OSDs

The create subcommand calls the prepare subcommand, and then calls the activate subcommand.

Prerequisites

  • A running IBM Storage Ceph cluster.

  • Root-level access to the Ceph OSD nodes.

Note: If you prefer to have more control over the creation process, you can use the prepare and activate subcommands separately to create the OSD instead of using create. You can use the two subcommands to gradually introduce new OSDs into a storage cluster, and avoid having to rebalance large amounts of data. Both approaches work the same way, except that using the create subcommand causes the OSD to become up and in immediately after completion.

Procedure

  • Create an OSD.

    Syntax 

    ceph-volume lvm create --bluestore --data VOLUME_GROUP/LOGICAL_VOLUME

    Example 

    [root@osd ~]# ceph-volume lvm create --bluestore --data example_vg/data_lv