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39 lines
2.3 KiB
XML
39 lines
2.3 KiB
XML
<!-- Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<section id="cloud_infrastructure_overview">
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<title>Cloud Infrastructure Overview</title>
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<para>
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The Management Server manages one or more zones (typically, datacenters) containing host computers where guest virtual machines will run. The cloud infrastructure is organized as follows:
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</para>
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<itemizedlist>
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<listitem><para>Zone: Typically, a zone is equivalent to a single datacenter. A zone consists of one or more pods and secondary storage. See About Zones.</para></listitem>
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<listitem><para>Pod: A pod is usually one rack of hardware that includes a layer-2 switch and one or more clusters. See About Pods.</para></listitem>
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<listitem><para>Cluster: A cluster consists of one or more hosts and primary storage. See About Clusters.</para></listitem>
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<listitem><para>Host: A single compute node within a cluster. The hosts are where the actual cloud services run in the form of guest virtual machines. See About Hosts.</para></listitem>
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<listitem><para>Primary storage is associated with a cluster, and it stores the disk volumes for all the VMs running on hosts in that cluster. See About Primary Storage</para></listitem>
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<listitem><para>Secondary storage is associated with a zone, and it stores templates, ISO images, and disk volume snapshots. See About Secondary Storage.</para></listitem>
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</itemizedlist>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/infrastructure_overview.png" />
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</imageobject>
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<textobject><phrase>infrastructure_overview.png: Nested organization of a zone</phrase></textobject>
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</mediaobject>
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</section>
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