Added OpenStack md information

Signed-off-by: Robert Wolff <robert.wolff@linaro.org>

Reference-Platform/Platforms/Enterprise/OpenStack/README.md

@@ -0,0 +1,105 @@
+# OpenStack
+
+This repository provides all the support code required to deploy a "Developer
+Cloud".
+
+# OpenStack packages
+
+The OpenStack packages are built by Linaro and made available in the following
+location:
+
+TBD
+
+The build scripts for the packages are available in this repository on the
+`openstack-venvs` folder. These scripts are provided on as is basis, and they
+are tailored specifically for Linaro's building environment. Use only at your
+own risk.
+
+# Reference Architecture
+
+The reference architecture deploys a cloud that uses Ceph as backend for OpenStack.
+
+See block diagram of how the servers should be connected to the network and how to
+spread the services on the different hosts on a default configuration in the [architecture document](docs/architecture.md).
+
+# Pre-requisites
+
+
+1. All the servers are supposed to have CentOS or Debian installed and they are supposed to
+have networking configured in a way that they can see/resolve each other's names.
+
+1. The nodes that will be used as Ceph OSDs need to have at least one extra harddrive for Ceph.
+
+1. The networking node should have 3 NICs connected as described in the [architecture document](docs/architecture.md).
+
+# Configuration
+
+Some example configuration files are provided in this repo as example, go through them and
+generate the equivalent ones for your particular deployment:
+
+    ansible/hosts.example
+    group_vars/all
+
+Ensure to use host names, instead of ips to avoid some known deployment issues.
+
+The playbook assumes your own files are in a folder called `ansible/secrets`, so the recommendation
+is to place your files there.
+
+# The deployment
+
+The deployment can be split in two different parts. Ceph and OpenStack.
+
+## Deploying Ceph
+
+1) Monitors are deployed and the cluster bootstrapmd:
+
+    ansible-playbook -K -v -i ./hosts ./site.yml --tags ceph-mon
+
+Check that the cluster is up and running by connecting to one of the monitors
+and checking:
+
+    ssh server1
+    ceph daemon mon.server1 mon_status
+
+2) OSDs assume a full hard drive is dedicated to Ceph at least. A default
+configuration if all the servers that will be OSDs have the same HD layout
+can be spedified in group_vars/all as follows:
+
+```
+ceph_host_osds:
+  - sbX
+  - sbY
+  - sbZ
+```
+
+If some server has a different configuration, this will be specified in the
+hostvars folder, in a file with the name of your server. For example:
+
+```
+$ cat hostvars/server1
+
+ceph_host_osds:
+  - sbZ
+  - sbY
+```
+
+After configuring, the OSDs are deployed as follows:
+
+  ansible-playbook -K -v -i ./secrets/hosts ./site.yml --tags ceph-osd
+
+2.1) In the case of setting up a cluster from scratch where ceph has been installed
+previously, there is an option to force the resetting of all the disks (this
+option WILL DELETE all the data on the OSDs). This option is not
+idempotent, use at your own risk. It is safe to use if you have cleanly deployed
+the machine and the disk to be used as OSD had a previously installed Ceph:
+
+    --extra-vars 'ceph_force_prepare=true'
+
+## Deploying OpenStack
+
+OpenStack is deployed using Ansible with the playbook defined in the "ansible"
+directory. You'll need to create the files "deployment-vars" and "hosts" to
+match your environment. There are examples to help guide you. Once those files
+are in place, OpenStack can be deployed with:
+
+    ansible-playbook -K -v -i secrets/hosts site.yml