Merge lp:~themue/clouddocs/003-splitted-and-continued-ceph into lp:~jujudocs/clouddocs/trunk

[Frank Mueller]

Splitted Ceph into installation and scaling and continued work. Scaling has to be continued later based on an information by James Page about possible inefficiencies when adding storrage nodes later.

=== modified file 'Scaling-Ceph.md'
--- Scaling-Ceph.md	2014-04-02 16:18:10 +0000
+++ Scaling-Ceph.md	2014-04-04 13:07:55 +0000
@@ -5,47 +5,30 @@
 
 ## Introduction
 
-As documented in the *OpenStack Installation Guide* we're using Ceph as block device
-for Cinder. It stripes block device images as objects across a cluster. This way it
-provides a better performance than a typical standalone server. So it allows scalability 
-and redundancy needs to be satisified and Cinder's RBD driver used to create, export and 
-connect volumes to instances. This assumes a functioning Ceph cluster has already been 
+Beside the redundancy for more safety and the higher performance through the usage of 
+Ceph as storage backend for OpenStack the user also benefits from the more simple way
+of scaling the storage of the needs grow.
 
 ## Scope
 
 **TODO**
 
-## Deployment
-
-**TODO** Check installation document and compare to Information by James Page.
-
-The usage of Ceph as block device for our Cinder needs a deployed and configured Ceph
-cluster. This has been described in the document mentioned above. Here our 
-`openstack-config.yaml` contains the setting `block-device: None` for Cinder.
-This way we don't use the local device for Cinder.
-
-The next step has to be adding the relations between Cinder and Ceph as well as Cinder
-and other needed services.
-
-````
-juju add-relation cinder ceph
-juju add-relation cinder keystone
-juju add-relation cinder mysql
-juju add-relation cinder rabbitmq-server
-juju add-relation cinder nova-cloud-controller
-````
-
 ## Scaling
 
 The addition of Ceph nodes is done using the Juju `add-node` command. By default
 it adds only one node, but it is possible to add the number of wanted nodes as
-argument.
-
-````
-# Add one ceph node
-$ juju add-node ceph
-# Add ten ceph nodes
-$ juju add-node ceph -n 10
-````
-
-**SEE ALSO** https://jujucharms.com/precise/ceph-22/#readme
+argument. To add one more Ceph OSD Daemon node you simply call
+
+```
+juju add-node ceph-osd
+```
+
+Larger numbers of nodes can be added using the `-n` argument, e.g. 10 nodes
+with
+
+```
+juju add-node -n 10 ceph-osd
+```
+
+**TODO** Adding nodes later can cause some in-efficiencies. This should be covered.
+