5443833cf3
As per discussion in the OSA docs summit session, clean up of installation guide. This fixes typos, minor RST mark up changes, and passive voice. Change-Id: Ic48981a2e3cb7f168e0148325b36a3842c68ceaf
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`Home <index.html>`_ OpenStack-Ansible Installation Guide
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===========
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Host layout
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===========
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We recommend a layout that contains a minimum of five hosts (or servers):
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- Three control plane infrastructure hosts
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- One logging infrastructure host
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- One compute host
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If using the optional Block Storage (cinder) service, we recommend
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the use of a sixth host. Block Storage hosts require an LVM volume group named
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``cinder-volumes``. See `the section called "Installation
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requirements" <overview-requirements.html>`_ and `the section
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called "Configuring LVM" <targethosts-configlvm.html>`_ for more information.
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The hosts are called target hosts because Ansible deploys the OSA
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environment within these hosts. We recommend a
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deployment host from which Ansible orchestrates the deployment
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process. One of the target hosts can function as the deployment host.
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Use at least one load balancer to manage the traffic among
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the target hosts. You can use any type of load balancer such as a hardware
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appliance or HAProxy. We recommend using physical load balancers for
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production environments.
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Infrastructure Control Plane target hosts contain the following
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services:
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- Infrastructure:
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- Galera
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- RabbitMQ
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- Memcached
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- Logging
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- Repository
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- OpenStack:
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- Identity (keystone)
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- Image service (glance)
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- Compute management (nova)
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- Networking (neutron)
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- Orchestration (heat)
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- Dashboard (horizon)
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Infrastructure Logging target hosts contain the following services:
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- Rsyslog
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Compute target hosts contain the following services:
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- Compute virtualization
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- Logging
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(Optional) Storage target hosts contain the following services:
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- Block Storage scheduler
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- Block Storage volumes
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**Figure 1.1. Host Layout Overview**
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.. image:: figures/environment-overview.png
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--------------
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.. include:: navigation.txt
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