Keane Lim ceea9dda0d Storage Guide update

Applied review feedback.

Fixed 'grey bars' formatting.
Fixed gerunds and lists
Added abbreviations and references

Change-Id: I104d678ce3ea52bddcbc141f8aad49ea1e1971db
Signed-off-by: Keane Lim <keane.lim@windriver.com>

2021-02-09 12:50:24 -05:00

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Ceph Cluster on a Controller Host

You can add one or more object storage devices (OSDs) 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.

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Ceph Cluster on a Controller Host

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