Added Installation for Wallaby

Updated the install guide for Wallaby. RDO and Ubuntu will need to be
updated when released as well as deploy guides.

Change-Id: Ia5adcd1f897a8f6741d99a9c6cc2e6944cd9bd0e

doc/install-guide/source/openstack-services.rst

@@ -6,6 +6,8 @@ The installation of individual OpenStack services is covered in the
 Project Installation Guides that are available at the following
 locations:
 
+* `OpenStack Installation Guides for Wallaby
+  <https://docs.openstack.org/wallaby/install/>`_
 * `OpenStack Installation Guides for Victoria
   <https://docs.openstack.org/victoria/install/>`_
 * `OpenStack Installation Guides for Ussuri
@@ -21,6 +23,29 @@ locations:
 * `OpenStack Installation Guides for Pike
   <https://docs.openstack.org/pike/install/>`_
 
+Minimal deployment for Wallaby
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+At a minimum, you need to install the following services. Install the services
+in the order specified below:
+
+* Identity service – `keystone installation for Wallaby
+  <https://docs.openstack.org/keystone/wallaby/install/>`_
+* Image service – `glance installation for Wallaby
+  <https://docs.openstack.org/glance/wallaby/install/>`_
+* Placement service – `placement installation for Wallaby
+  <https://docs.openstack.org/placement/wallaby/install/>`_
+* Compute service – `nova installation for Wallaby
+  <https://docs.openstack.org/nova/wallaby/install/>`_
+* Networking service – `neutron installation for Wallaby
+  <https://docs.openstack.org/neutron/wallaby/install/>`_
+
+We advise to also install the following components after you have installed the
+minimal deployment services:
+
+* Dashboard – `horizon installation for Wallaby <https://docs.openstack.org/horizon/wallaby/install/>`_
+* Block Storage service – `cinder installation for Wallaby <https://docs.openstack.org/cinder/wallaby/install/>`_
+
 Minimal deployment for Victoria
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

doc/install-guide/source/overview.rst

@@ -33,6 +33,7 @@ following steps toward deployment using a production architecture:
   The OpenStack project has a couple of deployment projects with
   specific guides per version:
 
+  - `Wallaby release <https://docs.openstack.org/wallaby/deploy/>`_
   - `Victoria release <https://docs.openstack.org/victoria/deploy/>`_
   - `Ussuri release <https://docs.openstack.org/ussuri/deploy/>`_
   - `Train release <https://docs.openstack.org/train/deploy/>`_

doc/install-guide/source/preface.rst

@@ -53,8 +53,9 @@ Red Hat Enterprise Linux and CentOS
 
   ..note::
 
-    OpenStack Ussuri is available for both CentOS 8 and RHEL 8. OpenStack
-    Train and earlier are available on both CentOS 7 and RHEL 7.
+    OpenStack Wallaby is available for CentOS Stream 8. OpenStack Ussuri and
+    Victoria are available for both CentOS 8 and RHEL 8. OpenStack Train and
+    earlier are available on both CentOS 7 and RHEL 7.
 
 Ubuntu
   You can walk through an installation by using packages available through