4247c75744
Partial-Bug: #1250515 backport: havana Change-Id: I11117af7e13966f70e0050f96a7b2a1c4bcb59ca author: diane fleming
79 lines
3.7 KiB
XML
79 lines
3.7 KiB
XML
<chapter 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" version="5.0"
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xml:id="ch_overview">
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<?dbhtml stop-chunking?>
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<title>Architecture</title>
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<para>This install guide offers a few of the many ways to install
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OpenStack components and have them work together. It is meant as a
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"choose your own adventure" guide, not a comprehensive guide. The
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<citetitle>OpenStack Configuration Reference</citetitle> lists
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every option in all OpenStack services. Before you begin an
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installation adventure, here are some things you should know about
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OpenStack concepts.</para>
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<xi:include href="../common/ch_getstart.xml"
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xpointer="element(para1)"/>
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<xi:include href="../common/ch_getstart.xml"
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xpointer="element(para2)"/>
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<xi:include href="../common/ch_getstart.xml"
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xpointer="element(para3)"/>
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<xi:include href="../common/ch_getstart.xml"
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xpointer="element(table1)"/>
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<xi:include href="../common/section_getstart_conceptual_arch.xml"/>
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<xi:include href="../common/section_getstart_logical_arch.xml"/>
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<section xml:id="overview-architecture">
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<title>Sample architectures</title>
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<para>This guide enables you to choose your own OpenStack
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adventure. OpenStack is highly configurable to meet different
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needs with various storage and networking options.</para>
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<para>This guide offers the following sample architecture
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examples:</para>
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<itemizedlist>
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<listitem>
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<para>Example basic architecture. This architecture has two
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nodes. A cloud controller node runs the control services,
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such as database, message queue, and API services for the
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Identity Service, Image Service, and Compute. A compute node
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runs the hypervisor where virtual machines live.</para>
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<figure xml:id="basic-architecture">
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<title>Basic architecture</title>
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<mediaobject>
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<imageobject>
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<imagedata contentwidth="6in"
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fileref="figures/basic-architecture.svg"/>
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</imageobject>
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</mediaobject>
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</figure>
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<para>Technical details: Compute with KVM, local ephemeral
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storage, <systemitem class="service">nova-network</systemitem> in multi-host flatDHCP mode, MySQL,
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nova-api, default scheduler, <phrase os="fedora;rhel;centos"
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>Qpid for messaging,</phrase><phrase
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os="ubuntu;debian;opensuse">RabbitMQ for
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messaging,</phrase> Identity Service with SQL back end, Image Service with
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local storage, Dashboard (optional extra). Uses as many
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default options as possible.</para>
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</listitem>
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<listitem>
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<para>Example architecture from the <link
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xlink:href="http://docs.openstack.org/trunk/openstack-ops/content/"
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><citetitle>OpenStack Operations
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Guide</citetitle></link>. Same as the basic architecture
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but with the Block Storage Service LVM/iSCSI back end, <systemitem class="service">nova-network</systemitem> in
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multi-host with FlatDHCP, Live Migration back end, shared
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storage with NFS, and Object Storage. One controller node
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and multiple compute nodes.</para>
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</listitem>
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<listitem>
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<para>Example architecture with Identity Service and Object
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Storage: Five-node installation with Identity Service on the
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proxy node and three replications of object servers.
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Dashboard does not support this configuration so examples
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are with CLI.</para>
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</listitem>
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<listitem>
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<para>Example architecture with OpenStack Networking.</para>
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</listitem>
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</itemizedlist>
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</section>
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</chapter>
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