.. _test-environment-config:

==================================================
Appendix A: Example test environment configuration
==================================================

Introduction
~~~~~~~~~~~~

This appendix describes an example test environment for a working
OpenStack-Ansible (OSA) deployment with a small number of servers.

This example environment has the following characteristics:

* One infrastructure (control plane) host (8 vCPU, 8 GB RAM, 60 GB HDD)
* One compute host (8 vCPU, 8 GB RAM, 60 GB HDD)
* One Network Interface Card (NIC) for each host
* A basic compute kit environment, with the Image (glance) and Compute (nova)
  services set to use file-backed storage.
* Internet access via the router address 172.29.236.1 on the
  Management Network

.. image:: figures/arch-layout-test.png
   :width: 100%
   :alt: Test environment host layout

Network configuration
~~~~~~~~~~~~~~~~~~~~~

Network CIDR/VLAN assignments
-----------------------------

The following CIDR and VLAN assignments are used for this environment.

+-----------------------+-----------------+------+
| Network               | CIDR            | VLAN |
+=======================+=================+======+
| Management Network    | 172.29.236.0/22 |  10  |
+-----------------------+-----------------+------+
| Tunnel (VXLAN) Network| 172.29.240.0/22 |  30  |
+-----------------------+-----------------+------+
| Storage Network       | 172.29.244.0/22 |  20  |
+-----------------------+-----------------+------+

IP assignments
--------------

The following host name and IP address assignments are used for this
environment.

+------------------+----------------+-------------------+----------------+
| Host name        | Management IP  | Tunnel (VxLAN) IP | Storage IP     |
+==================+================+===================+================+
| infra1           | 172.29.236.11  |                   |                |
+------------------+----------------+-------------------+----------------+
| compute1         | 172.29.236.12  | 172.29.240.12     | 172.29.244.12  |
+------------------+----------------+-------------------+----------------+
| storage1         | 172.29.236.13  |                   | 172.29.244.13  |
+------------------+----------------+-------------------+----------------+

Host network configuration
--------------------------

Each host will require the correct network bridges to be implemented. The
following is the ``/etc/network/interfaces`` file for ``infra1``.

.. note::

   If your environment does not have ``eth0``, but instead has ``p1p1`` or
   some other interface name, ensure that all references to ``eth0`` in all
   configuration files are replaced with the appropriate name. The same
   applies to additional network interfaces.

.. literalinclude:: ../../etc/network/interfaces.d/openstack_interface.cfg.test.example

Deployment configuration
~~~~~~~~~~~~~~~~~~~~~~~~~

Environment layout
------------------

The ``/etc/openstack_deploy/openstack_user_config.yml`` file defines the
environment layout.

The following configuration describes the layout for this environment.

.. literalinclude:: ../../etc/openstack_deploy/openstack_user_config.yml.test.example

Environment customizations
--------------------------

The optionally deployed files in ``/etc/openstack_deploy/env.d`` allow the
customization of Ansible groups. This allows the deployer to set whether
the services will run in a container (the default), or on the host (on
metal).

For this environment you do not need the ``/etc/openstack_deploy/env.d``
folder as the defaults set by OpenStack-Ansible are suitable.

User variables
--------------

The ``/etc/openstack_deploy/user_variables.yml`` file defines the global
overrides for the default variables

For this environment you do not need the
``/etc/openstack_deploy/user_variables.yml`` file as the defaults set by
OpenStack-Ansible are suitable.