mirror of
https://github.com/apache/cloudstack.git
synced 2025-11-04 00:02:37 +01:00
164 lines
7.7 KiB
XML
164 lines
7.7 KiB
XML
<?xml version='1.0' encoding='utf-8' ?>
|
|
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
|
<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
|
|
%BOOK_ENTITIES;
|
|
]>
|
|
|
|
<!-- Licensed to the Apache Software Foundation (ASF) under one
|
|
or more contributor license agreements. See the NOTICE file
|
|
distributed with this work for additional information
|
|
regarding copyright ownership. The ASF licenses this file
|
|
to you under the Apache License, Version 2.0 (the
|
|
"License"); you may not use this file except in compliance
|
|
with the License. You may obtain a copy of the License at
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
Unless required by applicable law or agreed to in writing,
|
|
software distributed under the License is distributed on an
|
|
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
KIND, either express or implied. See the License for the
|
|
specific language governing permissions and limitations
|
|
under the License.
|
|
-->
|
|
<section id="reserved-ip-addresses-non-csvms">
|
|
<title>IP Reservation in Isolated Guest Networks</title>
|
|
<para>In isolated guest networks, a part of the guest IP address space can be reserved for
|
|
non-&PRODUCT; VMs or physical servers. To do so, you configure a range of Reserved IP addresses
|
|
by specifying the CIDR when a guest network is in Implemented state. If your customers wish to
|
|
have non-&PRODUCT; controlled VMs or physical servers on the same network, they can share a part
|
|
of the IP address space that is primarily provided to the guest network.</para>
|
|
<para>In an Advanced zone, an IP address range or a CIDR is assigned to a network when the network
|
|
is defined. The &PRODUCT; virtual router acts as the DHCP server and uses CIDR for assigning IP
|
|
addresses to the guest VMs. If you decide to reserve IP ranges for non-&PRODUCT; purposes, you
|
|
can specify a part of the IP address range or the CIDR that should only be allocated by the DHCP
|
|
service of the virtual router to the guest VMs created in &PRODUCT;. The remaining IPs in that
|
|
network are called Reserved IP Range. When IP reservation is configured, the administrator can
|
|
add additional VMs or physical servers that are not part of &PRODUCT; to the same network and
|
|
assign them the Reserved IP addresses. &PRODUCT; guest VMs cannot acquire IPs from the Reserved
|
|
IP Range.</para>
|
|
<section id="ip-reserve-consider">
|
|
<title>IP Reservation Considerations</title>
|
|
<para>Consider the following before you reserve an IP range for non-&PRODUCT; machines:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>IP Reservation can be applied only when the network is in Implemented state.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>No IP Reservation is done by default.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Guest VM CIDR you specify must be a subset of the network CIDR.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Specify a valid Guest VM CIDR. IP Reservation is applied only if no active IPs exist
|
|
outside the Guest VM CIDR. </para>
|
|
<para>You cannot apply IP Reservation if any VM is alloted with an IP address that is
|
|
outside the Guest VM CIDR.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>To reset an existing IP Reservation, apply IP reservation by specifying the value of
|
|
network CIDR in the CIDR field.</para>
|
|
<para>For example, the following table describes three scenarios of guest network
|
|
creation:</para>
|
|
<informaltable>
|
|
<tgroup cols="5" align="left" colsep="1" rowsep="1">
|
|
<colspec colnum="1" colname="c1" colwidth="33.0pt"/>
|
|
<colspec colnum="2" colname="c2" colwidth="84.75pt"/>
|
|
<colspec colnum="3" colname="c3" colwidth="97.5pt"/>
|
|
<colspec colnum="4" colname="c4" colwidth="129.0pt"/>
|
|
<colspec colnum="5" colname="c5" colwidth="336.0pt"/>
|
|
<thead>
|
|
<row>
|
|
<entry><para>Case</para></entry>
|
|
<entry><para> CIDR</para></entry>
|
|
<entry><para>Network CIDR</para></entry>
|
|
<entry><para>Reserved IP Range for Non-&PRODUCT; VMs</para></entry>
|
|
<entry><para>Description</para></entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry><para>1</para></entry>
|
|
<entry><para>10.1.1.0/24</para></entry>
|
|
<entry><para> None</para></entry>
|
|
<entry><para>None</para></entry>
|
|
<entry><para>No IP Reservation.</para></entry>
|
|
</row>
|
|
<row>
|
|
<entry><para>2</para></entry>
|
|
<entry><para>10.1.1.0/26</para></entry>
|
|
<entry><para>10.1.1.0/24</para></entry>
|
|
<entry><para>10.1.1.64 to 10.1.1.254</para></entry>
|
|
<entry><para>IP Reservation configured by the UpdateNetwork API with
|
|
guestvmcidr=10.1.1.0/26 or enter 10.1.1.0/26 in the CIDR field in the
|
|
UI.</para></entry>
|
|
</row>
|
|
<row>
|
|
<entry><para>3</para></entry>
|
|
<entry><para>10.1.1.0/24</para></entry>
|
|
<entry><para>None</para></entry>
|
|
<entry><para>None</para></entry>
|
|
<entry><para>Removing IP Reservation by the UpdateNetwork API with
|
|
guestvmcidr=10.1.1.0/24 or enter 10.1.1.0/24 in the CIDR field in the UI.
|
|
</para></entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</informaltable>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
<section id="ip-reserv-limition">
|
|
<title>Limitations</title>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>The IP Reservation is not supported if active IPs that are found outside the Guest VM
|
|
CIDR. </para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Upgrading network offering which causes a change in CIDR (such as upgrading an
|
|
offering with no external devices to one with external devices) IP Reservation becomes
|
|
void if any. Reconfigure IP Reservation in the new re-implemeted network.</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
<section id="best-practice-ipreserv">
|
|
<title>Best Practices</title>
|
|
<para>Apply IP Reservation to the guest network as soon as the network state changes to
|
|
Implemented. If you apply reservation soon after the first guest VM is deployed, lesser
|
|
conflicts occurs while applying reservation. </para>
|
|
</section>
|
|
<section id="reserve-ip">
|
|
<title>Reserving an IP Range</title>
|
|
<orderedlist>
|
|
<listitem>
|
|
<para>Log in to the &PRODUCT; UI as an administrator or end user.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>In the left navigation, choose Network.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Click the name of the network you want to modify.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>In the Details tab, click Edit.<inlinemediaobject>
|
|
<imageobject>
|
|
<imagedata fileref="./images/edit-icon.png"/>
|
|
</imageobject>
|
|
<textobject>
|
|
<phrase>edit-icon.png: button to edit a network</phrase>
|
|
</textobject>
|
|
</inlinemediaobject></para>
|
|
<para>The CIDR field changes to editable one.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>In CIDR, specify the Guest VM CIDR.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Click Apply.</para>
|
|
<para>Wait for the update to complete. The Network CIDR and the Reserved IP Range are
|
|
displayed on the Details page.</para>
|
|
</listitem>
|
|
</orderedlist>
|
|
</section>
|
|
</section>
|