update sources to v12.2.0

[ceph.git] / ceph / doc / rbd / rbd-mirroring.rst

diff --git a/ceph/doc/rbd/rbd-mirroring.rst b/ceph/doc/rbd/rbd-mirroring.rst
index 5f1c1148907d0cc9a16c961072e5ada5cd6a51e5..989f1fc3287d0c5ba25c620916bd47d467f16576 100644 (file)
--- a/ceph/doc/rbd/rbd-mirroring.rst
+++ b/ceph/doc/rbd/rbd-mirroring.rst
@@ -36,6 +36,13 @@ Ceph clusters.
    configuration file of the same name (e.g. /etc/ceph/remote.conf).  See the
    `ceph-conf`_ documentation for how to configure multiple clusters.
 
+.. note:: Images in a given pool will be mirrored to a pool with the same name
+   on the remote cluster. Images using a separate data-pool will use a data-pool
+   with the same name on the remote cluster. E.g., if an image being mirrored is
+   in the ``rbd`` pool on the local cluster and using a data-pool called
+   ``rbd-ec``, pools called ``rbd`` and ``rbd-ec`` must exist on the remote
+   cluster and will be used for mirroring the image.
+
 Enable Mirroring
 ----------------
 
@@ -288,13 +295,24 @@ distribution package.
 
 .. important:: Each ``rbd-mirror`` daemon requires the ability to connect
    to both clusters simultaneously.
-.. warning:: Only run a single ``rbd-mirror`` daemon per Ceph cluster. A
-   future Ceph release will add support for horizontal scale-out of the
-   ``rbd-mirror`` daemon.
+.. warning:: Pre-Luminous releases: only run a single ``rbd-mirror`` daemon per
+   Ceph cluster.
+
+Each ``rbd-mirror`` daemon should use a unique Ceph user ID. To
+`create a Ceph user`_, with ``ceph`` specify the ``auth get-or-create``
+command, user name, monitor caps, and OSD caps::
+
+  ceph auth get-or-create client.rbd-mirror.{unique id} mon 'profile rbd' osd 'profile rbd'
+
+The ``rbd-mirror`` daemon can be managed by ``systemd`` by specifying the user
+ID as the daemon instance::
+
+  systemctl enable ceph-rbd-mirror@rbd-mirror.{unique id}
 
 .. _rbd: ../../man/8/rbd
 .. _ceph-conf: ../../rados/configuration/ceph-conf/#running-multiple-clusters
 .. _explicitly enabled: #enable-image-mirroring
 .. _force resync command: #force-image-resync
 .. _demote the image: #image-promotion-and-demotion
+.. _create a Ceph user: ../../rados/operations/user-management#add-a-user