8d2b198d61
The XML declaration should be available on the first line in every XML file and should match the following line: <?xml version="1.0" encoding="UTF-8"?> Change-Id: I29b3d4b730d7ff01c89f34b0bef60b74a858de13
65 lines
2.7 KiB
XML
65 lines
2.7 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" version="5.0"
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xml:id="basics-prerequisites">
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<?dbhtml-stop-chunking?>
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<title>Before you begin</title>
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<para>For a functional environment, OpenStack doesn't require a
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significant amount of resources. We recommend that your environment meets
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or exceeds the following minimum requirements which can support several
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minimal <glossterm>CirrOS</glossterm> instances:</para>
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<itemizedlist>
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<listitem>
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<para>Controller Node: 1 processor, 2 GB memory, and 5 GB
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storage</para>
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</listitem>
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<listitem>
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<para>Network Node: 1 processor, 512 MB memory, and 5 GB
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storage</para>
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</listitem>
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<listitem>
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<para>Compute Node: 1 processor, 2 GB memory, and 10 GB
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storage</para>
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</listitem>
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</itemizedlist>
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<para>To minimize clutter and provide more resources for OpenStack, we
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recommend a minimal installation of your Linux distribution. Also, we
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strongly recommend that you install a 64-bit version of your distribution
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on at least the compute node. If you install a 32-bit version of your
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distribution on the compute node, attempting to start an instance using
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a 64-bit image will fail.</para>
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<note>
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<para>A single disk partition on each node works for most basic
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installations. However, you should consider
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<glossterm>Logical Volume Manager (LVM)</glossterm> for installations
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with optional services such as Block Storage.</para>
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</note>
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<para>Many users build their test environments on
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<glossterm baseform="virtual machine (VM)">virtual machines
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(VMs)</glossterm>. The primary benefits of VMs include the
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following:</para>
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<itemizedlist>
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<listitem>
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<para>One physical server can support multiple nodes, each with almost
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any number of network interfaces.</para>
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</listitem>
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<listitem>
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<para>Ability to take periodic "snap shots" throughout the installation
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process and "roll back" to a working configuration in the event of
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a problem.</para>
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</listitem>
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</itemizedlist>
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<para>However, VMs will reduce performance of your instances, particularly
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if your hypervisor and/or processor lacks support for hardware
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acceleration of nested VMs.</para>
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<note>
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<para>If you choose to install on VMs, make sure your hypervisor
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permits <glossterm>promiscuous mode</glossterm> on the
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<glossterm>external network</glossterm>.</para>
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</note>
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<para>For more information about system requirements, see the <link
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xlink:href="http://docs.openstack.org/ops/">OpenStack Operations
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Guide</link>.</para>
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</section>
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