update ceph source to reef 18.2.1

[ceph.git] / ceph / doc / cephadm / services / mds.rst

diff --git a/ceph/doc/cephadm/services/mds.rst b/ceph/doc/cephadm/services/mds.rst
index 949a0fa5d8e7a87340c5b22ecbc017993c6eeb8d..96b7c2dda78a4476bed832fcc73664c89e65e5f9 100644 (file)
--- a/ceph/doc/cephadm/services/mds.rst
+++ b/ceph/doc/cephadm/services/mds.rst
@@ -20,7 +20,18 @@ For example:
   ceph fs volume create <fs_name> --placement="<placement spec>"
 
 where ``fs_name`` is the name of the CephFS and ``placement`` is a
-:ref:`orchestrator-cli-placement-spec`.
+:ref:`orchestrator-cli-placement-spec`. For example, to place
+MDS daemons for the new ``foo`` volume on hosts labeled with ``mds``:
+
+.. prompt:: bash #
+
+  ceph fs volume create foo --placement="label:mds"
+
+You can also update the placement after-the-fact via:
+
+.. prompt:: bash #
+
+  ceph orch apply mds foo 'mds-[012]'
 
 For manually deploying MDS daemons, use this specification:
 
@@ -30,6 +41,7 @@ For manually deploying MDS daemons, use this specification:
     service_id: fs_name
     placement:
       count: 3
+      label: mds
 
 
 The specification can then be applied using: