From ef6eced698718b4f4399526bf42c6ef84a57498f Mon Sep 17 00:00:00 2001 From: Alfredo Deza Date: Tue, 8 May 2018 13:47:11 -0400 Subject: [PATCH] doc/ceph-volume high-level description of simple activate at index.rst Signed-off-by: Alfredo Deza (cherry picked from commit dd6f368158db7f102b485179166ebe73d6ea622f) --- doc/ceph-volume/simple/index.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/doc/ceph-volume/simple/index.rst b/doc/ceph-volume/simple/index.rst index 6f2534a738e36..315dea99a1061 100644 --- a/doc/ceph-volume/simple/index.rst +++ b/doc/ceph-volume/simple/index.rst @@ -17,3 +17,16 @@ Implements the functionality needed to manage OSDs from the ``simple`` subcomman By *taking over* management, it disables all ``ceph-disk`` systemd units used to trigger devices at startup, relying on basic (customizable) JSON configuration and systemd for starting up OSDs. + +This process involves two steps: + +#. :ref:`Scan ` the running OSD or the data device +#. :ref:`Activate ` the scanned OSD + +The scanning will infer everything that ``ceph-volume`` needs to start the OSD, +so that when activation is needed, the OSD can start normally without getting +interference from ``ceph-disk``. + +As part of the activation process the systemd units for ``ceph-disk`` in charge +of reacting to ``udev`` events, are linked to ``/dev/null`` so that they are +fully inactive. -- 2.39.5