openstack/openstack-ansible
Code Issues Proposed changes
openstack-ansible/doc/source/install-guide/overview-hostlayout.rst
Jesse Pretorius 7a12374003 Various Documentation Updates 
This patch does the following:

- Move the CONTRIBUTING doc content into the developer documentation
- Move the development-stack doc content into the developer documentation
- Rename all instances of 'OpenStack Ansible' to 'OpenStack-Ansible'
- Implements a simpler navigation index for the bottom of the page
- Implements a navigation index at the bottom of all developer docs
- Updates the README to reflect where to get documentation and further
  information
- Adds more information into the 'scripts' developer doc
- Updates the 'Additional Resources' Appendix with Ansible information

Change-Id: Ic08ba072f3b3d1e4e446d1e81c20c0cdf01833de
2015-10-05 18:16:01 +01:00

1.7 KiB
Raw Blame History

Home OpenStack-Ansible Installation Guide

Host layout

The recommended layout contains a minimum of five hosts (or servers).

  • Three control plane infrastructure hosts
  • One logging infrastructure host
  • One compute host

To use the optional Block Storage (cinder) service, a sixth host is recommended. Block Storage hosts require an LVM volume group named cinder-volumes. See the section called "Installation requirements" and the section called "Configuring LVM" for more information.

The hosts are called target hosts because Ansible deploys the OSA environment within these hosts. The OSA environment also recommends a deployment host from which Ansible orchestrates the deployment process. One of the target hosts can function as the deployment host.

At least one hardware load balancer must be included to manage the traffic among the target hosts.

Infrastructure Control Plane target hosts contain the following services:

  • Infrastructure:
    • Galera
    • RabbitMQ
    • Memcached
    • Logging
  • OpenStack:
    • Identity (keystone)
    • Image service (glance)
    • Compute management (nova)
    • Networking (neutron)
    • Orchestration (heat)
    • Dashboard (horizon)

Infrastructure Logging target hosts contain the following services:

  • Rsyslog
  • Logstash
  • Elasticsearch with Kibana

Compute target hosts contain the following services:

  • Compute virtualization
  • Logging

(Optional) Storage target hosts contain the following services:

  • Block Storage scheduler
  • Block Storage volumes

Figure 2.1. Host Layout Overview

image