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1 | .. _ceph-volume-overview: |
2 | ||
3 | Overview | |
4 | -------- | |
5 | The ``ceph-volume`` tool aims to be a single purpose command line tool to deploy | |
6 | logical volumes as OSDs, trying to maintain a similar API to ``ceph-disk`` when | |
7 | preparing, activating, and creating OSDs. | |
8 | ||
9 | It deviates from ``ceph-disk`` by not interacting or relying on the udev rules | |
10 | that come installed for Ceph. These rules allow automatic detection of | |
11 | previously setup devices that are in turn fed into ``ceph-disk`` to activate | |
12 | them. | |
13 | ||
14 | ||
15 | ``ceph-volume lvm`` | |
16 | ------------------- | |
17 | By making use of :term:`LVM tags`, the :ref:`ceph-volume-lvm` sub-command is | |
18 | able to store and later re-discover and query devices associated with OSDs so | |
19 | that they can later activated. |