Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/doc/ceph-volume/simple/index.rst b/doc/ceph-volume/simple/index.rst
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+.. _ceph-volume-simple:
+
+``simple``
+==========
+Implements the functionality needed to manage OSDs from the ``simple`` subcommand:
+``ceph-volume simple``
+
+**Command Line Subcommands**
+
+* :ref:`ceph-volume-simple-scan`
+
+* :ref:`ceph-volume-simple-activate`
+
+* :ref:`ceph-volume-simple-systemd`
+
+
+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 <ceph-volume-simple-scan>` the running OSD or the data device
+#. :ref:`Activate <ceph-volume-simple-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.