Ceph Cluster on a Controller Host

You can add one or more Ceph disks (OSD disks) per controller host for data storage.

About this task

See Configure Ceph OSDs on a Host for details on configuring Ceph on a host.

For Standard-with-controller storage and All-in-one Duplex scenarios with 2x controllers, Ceph replication is nodal. For All-in-one Simplex, with a single controller, replication is across OSDs.

For All-in-one Simplex and Duplex there is a single Ceph monitor; on Duplex, the Ceph monitor floats between controllers. For Standard-with-controller storage, there are 3 Ceph monitors; 2 automatically configured on each controller and the third Ceph monitor configured on one of the worker nodes.

Prerequisites

The worker must be locked.

Procedure

• To configure a Ceph monitor on a worker node, execute the following command:

  ~(keystone_admin)$ system ceph-mon-add compute-0
  

• To add OSDs on an AIO-SX, AIO-DX and Standard systems, see Provision Storage on a Controller or Storage Host Using Horizon for more information.