starlingx/docs
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docs/doc/source/storage/kubernetes/ceph-cluster-on-a-controller-host.rst
Elaine Fonaro ab5a865574 Fixed the OSD acronym Ceph disk upercase 
Added upper case for Ceph disk.
Address comment in review https://review.opendev.org/c/starlingx/docs/+/864177

Signed-off-by: Elaine Fonaro <elaine.fonaro@windriver.com>
Change-Id: Ib3706a97636849664e0dfa2c7c82ead433f3ed4b
2022-11-11 11:06:38 -03:00

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Ceph Cluster on a Controller Host

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

See Configure Ceph OSDs on a Host <ceph-storage-pools> 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.

The worker must be locked.

  • 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 <provision-storage-on-a-controller-or-storage-host-using-horizon> for more information.