doc: Add note to osds_per_device description about dual-actuator devices

This commit adds information about using dual-actuator devices with the
osds_per_device drive group option, letting users know they can create
an OSD for each actuator by setting this value to 2 in the drive group
they're using to apply OSDs to the device.

Signed-off-by: Joseph Sawaya <jsawaya@redhat.com>

diff --git a/src/python-common/ceph/deployment/drive_group.py b/src/python-common/ceph/deployment/drive_group.py
index f64f48abafc995a8301e45268dca9cf287ef2b43..72019dd88a2c82e8ccc2931d376ac633c5efcb2e 100644 (file)
--- a/src/python-common/ceph/deployment/drive_group.py
+++ b/src/python-common/ceph/deployment/drive_group.py
@@ -208,6 +208,7 @@ class DriveGroupSpec(ServiceSpec):
 
         #: Number of osd daemons per "DATA" device.
         #: To fully utilize nvme devices multiple osds are required.
+        #: Can be used to split dual-actuator devices across 2 OSDs, by setting the option to 2.
         self.osds_per_device = osds_per_device
 
         #: A list of strings, containing paths which should back OSDs