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43 lines
3.0 KiB
XML
43 lines
3.0 KiB
XML
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
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%BOOK_ENTITIES;
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]>
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<!-- 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="large_scale_redundant_setup">
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<title>Large-Scale Redundant Setup</title>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/large-scale-redundant-setup.png" />
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</imageobject>
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<textobject><phrase>Large-Scale Redundant Setup</phrase></textobject>
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</mediaobject>
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<para>This diagram illustrates the network architecture of a large-scale &PRODUCT; deployment.</para>
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<itemizedlist>
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<listitem><para>A layer-3 switching layer is at the core of the data center. A router redundancy protocol like VRRP should be deployed. Typically high-end core switches also include firewall modules. Separate firewall appliances may also be used if the layer-3 switch does not have integrated firewall capabilities. The firewalls are configured in NAT mode. The firewalls provide the following functions:</para>
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<itemizedlist>
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<listitem><para>Forwards HTTP requests and API calls from the Internet to the Management Server. The Management Server resides on the management network.</para></listitem>
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<listitem><para>When the cloud spans multiple zones, the firewalls should enable site-to-site VPN such that servers in different zones can directly reach each other.</para></listitem>
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</itemizedlist>
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</listitem>
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<listitem><para>A layer-2 access switch layer is established for each pod. Multiple switches can be stacked to increase port count. In either case, redundant pairs of layer-2 switches should be deployed.</para></listitem>
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<listitem><para>The Management Server cluster (including front-end load balancers, Management Server nodes, and the MySQL database) is connected to the management network through a pair of load balancers.</para></listitem>
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<listitem><para>Secondary storage servers are connected to the management network.</para></listitem>
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<listitem><para>Each pod contains storage and computing servers. Each storage and computing server should have redundant NICs connected to separate layer-2 access switches.</para></listitem>
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</itemizedlist>
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</section>
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