93 lines
4.8 KiB
XML
93 lines
4.8 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="configuring-rpc">
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<?dbhtml stop-chunking?>
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<title>Configure the Oslo RPC messaging system</title>
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<para>OpenStack projects use AMQP, an open standard for messaging
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middleware. OpenStack services that run on multiple servers to
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talk to each other. OpenStack Oslo RPC supports three
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implementations of AMQP: <application>RabbitMQ</application>,
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<application>Qpid</application>, and
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<application>ZeroMQ</application>.</para>
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<section xml:id="configuration-rabbitmq">
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<title>Configure RabbitMQ</title>
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<para>OpenStack Oslo RPC uses <application>RabbitMQ</application>
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by default. Use these options to configure the
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<application>RabbitMQ</application> message system. The
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<literal>rpc_backend</literal> option is not required as long
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as <application>RabbitMQ</application> is the default messaging
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system. However, if it is included the configuration, you must
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set it to
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<literal>nova.openstack.common.rpc.impl_kombu</literal>.</para>
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<programlisting language="ini">rpc_backend=nova.openstack.common.rpc.impl_kombu</programlisting>
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<para>You can use these additional options to configure the
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<application>RabbitMQ</application> messaging system. You can
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configure messaging communication for different installation
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scenarios, tune retries for RabbitMQ, and define the size of the
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RPC thread pool. To monitor notifications through RabbitMQ, you
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must set the <option>notification_driver</option> option to
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<literal>nova.openstack.common.notifier.rpc_notifier</literal> in the
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<filename>nova.conf</filename> file. The default for sending
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usage data is sixty seconds plus a random number of seconds from
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zero to sixty.</para>
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<xi:include href="../../common/tables/nova-rabbitmq.xml"/>
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<xi:include href="../../common/tables/nova-kombu.xml"/>
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</section>
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<section xml:id="configuration-qpid">
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<title>Configure Qpid</title>
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<para>Use these options to configure the
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<application>Qpid</application> messaging system for OpenStack
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Oslo RPC. <application>Qpid</application> is not the default
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messaging system, so you must enable it by setting the
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<option>rpc_backend</option> option in the
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<filename>nova.conf</filename> file.</para>
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<programlisting language="ini">rpc_backend=nova.openstack.common.rpc.impl_qpid</programlisting>
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<para>This critical option points the compute nodes to the
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<application>Qpid</application> broker (server). Set
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<option>qpid_hostname</option> to the host name where the
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broker runs in the <filename>nova.conf</filename> file.</para>
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<note>
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<para>The <parameter>--qpid_hostname</parameter> option accepts a host
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name or IP address value.</para>
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</note>
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<programlisting language="ini">qpid_hostname=hostname.example.com</programlisting>
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<para>If the <application>Qpid</application> broker listens on a
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port other than the AMQP default of <literal>5672</literal>, you
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must set the <option>qpid_port</option> option to that
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value:</para>
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<programlisting language="ini">qpid_port=12345</programlisting>
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<para>If you configure the <application>Qpid</application> broker
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to require authentication, you must add a user name and password
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to the configuration:</para>
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<programlisting language="ini">qpid_username=username
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qpid_password=password</programlisting>
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<para>By default, TCP is used as the transport. To enable SSL, set
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the <option>qpid_protocol</option> option:</para>
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<programlisting language="ini">qpid_protocol=ssl</programlisting>
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<para>This table lists additional options that you use to
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configure the Qpid messaging driver for OpenStack Oslo RPC.
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These options are used infrequently.</para>
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<xi:include href="../../common/tables/nova-qpid.xml"/>
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</section>
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<section xml:id="configuration-zeromq">
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<title>Configure ZeroMQ</title>
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<para>Use these options to configure the
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<application>ZeroMQ</application> messaging system for
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OpenStack Oslo RPC. <application>ZeroMQ</application> is not the
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default messaging system, so you must enable it by setting the
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<option>rpc_backend</option> option in the
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<filename>nova.conf</filename> file.</para>
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<xi:include href="../../common/tables/nova-zeromq.xml"/>
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</section>
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<section xml:id="common-messaging-configuration">
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<title>Configure messaging</title>
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<para>Use these options to configure the
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<application>RabbitMQ</application> and
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<application>Qpid</application> messaging drivers.</para>
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<xi:include href="../../common/tables/nova-rpc.xml"/>
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</section>
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</section>
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