<chapter xmlns="http://docbook.org/ns/docbook"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xi="http://www.w3.org/2001/XInclude"
    version="5.0" xml:id="ha-aa-controllers">
      <info>
        <title>OpenStack controller nodes</title>
      </info>
      <simpara>OpenStack controller nodes contain:</simpara>
      <itemizedlist>
        <listitem>
          <simpara>
All OpenStack API services
</simpara>
        </listitem>
        <listitem>
          <simpara>
All OpenStack schedulers
</simpara>
        </listitem>
        <listitem>
          <simpara>
Memcached service
</simpara>
        </listitem>
      </itemizedlist>

      <xi:include href="./ha_aa_controllers/section_run_openstack_api_and_schedulers.xml"/>
      <xi:include href="./ha_aa_controllers/section_memcached.xml"/>

    </chapter>