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73 lines
3.7 KiB
XML
73 lines
3.7 KiB
XML
<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE section 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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<chapter id="user-services-overview">
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<title>User Services Overview</title>
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<para>In addition to the physical and logical infrastructure of your cloud
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and the &PRODUCT; software and servers, you also need a layer of user
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services so that people can actually make use of the cloud. This means
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not just a user UI, but a set of options and resources that users can
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choose from, such as templates for creating virtual machines, disk
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storage, and more. If you are running a commercial service, you will be
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keeping track of what services and resources users are consuming and
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charging them for that usage. Even if you do not charge anything for
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people to use your cloud – say, if the users are strictly internal to your
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organization, or just friends who are sharing your cloud – you can still
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keep track of what services they use and how much of them.
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</para>
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<section id="offerings-and-templates">
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<title>Service Offerings, Disk Offerings, Network Offerings, and Templates</title>
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<para>A user creating a new instance can make a variety of choices about
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its characteristics and capabilities. &PRODUCT; provides several ways to
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present users with choices when creating a new instance:
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</para>
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<itemizedlist>
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<listitem><para>Service Offerings, defined by the &PRODUCT; administrator,
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provide a choice of CPU speed, number of CPUs, RAM size, tags on the
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root disk, and other choices. See Creating a New Compute Offering.</para>
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</listitem>
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<listitem><para>Disk Offerings, defined by the &PRODUCT; administrator,
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provide a choice of disk size and IOPS (Quality of Service) for primary
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data storage. See Creating a New Disk Offering.</para>
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</listitem>
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<listitem><para>Network Offerings, defined by the &PRODUCT; administrator,
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describe the feature set that is available to end users from the virtual
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router or external networking devices on a given guest network. See
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Network Offerings.</para>
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</listitem>
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<listitem><para>Templates, defined by the &PRODUCT; administrator or by
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any &PRODUCT; user, are the base OS images that the user can choose
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from when creating a new instance. For example, &PRODUCT; includes
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CentOS as a template. See Working with Templates.</para>
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</listitem>
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</itemizedlist>
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<para>In addition to these choices that are provided for users, there is
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another type of service offering which is available only to the &PRODUCT;
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root administrator, and is used for configuring virtual infrastructure
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resources. For more information, see Upgrading a Virtual Router with
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System Service Offerings.
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</para>
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</section>
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</chapter>
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