7ec78aef2d
was incorrectly placed in trunk/training-guide non-plural, now trunk/training-guides. also add redirect from trunk/openstack-training and trunk/training-guide to the new location. Change-Id: I0648a9604dc6a1d6c7480a90c07871608a8752ca Closes-Bug: #1255684
129 lines
6.4 KiB
XML
129 lines
6.4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
||
<chapter xmlns="http://docbook.org/ns/docbook"
|
||
xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||
version="5.0"
|
||
xml:id="module001-ch001-intro-text">
|
||
<title>Introduction To OpenStack</title>
|
||
<para>Cloud Computing’s hype has certainly attracted IT Giants and
|
||
the entire Open Source community's attention, amidst all this
|
||
chaos of disrupting the software world and the way we saw and
|
||
thought about it. We need to enlighten ourselves with this massive
|
||
change as time again, entire Open Source community has seen the
|
||
rise of yet another project which is called as OpenStack. It is
|
||
believed that OpenStack will have a similar impact on the future
|
||
computing as Linux had on the ‘Post Unix’ era. This is not only
|
||
affecting the softwares, IT industry or the OpenSource world but
|
||
also the Scientific, Commercial and Domestic part of the world.
|
||
Cloud Computing has proven and solved many challenges and also cut
|
||
time and expenditure, OpenStack pitches in to make OPEX an Open
|
||
phenomenon. It is going to innovate Education to a further greater
|
||
extent, that too at an unimaginable and massive rate. Every
|
||
student will be exposed with the tools and the resources which are
|
||
locked in at high level scientific and corporate places which are
|
||
usually tough to get in touch with, further innovating the pace of
|
||
education and expanding its possibilities. Being open in nature,
|
||
these resources are free to use and modify, tailor them at no cost,
|
||
shape them as per your requirements and let the cloud do all the
|
||
hard work.</para>
|
||
<para>In data centers today, many computers suffer under-utilization
|
||
in computing power and networking bandwidth. For example, projects
|
||
may need a large amount of computing capacity to complete a
|
||
computation, but no longer need the computing power after
|
||
completing the computation. You want cloud computing when you want
|
||
a service that's available on-demand with the flexibility to bring
|
||
it up or down through automation or with little intervention. Much
|
||
like the electrical power we receive each day, cloud computing
|
||
provides subscribers or users with access to a shared collection
|
||
of computing resources: networks for transfer, servers for
|
||
storage, and applications or services for completing tasks.</para>
|
||
<para>These are the compelling features of a cloud:</para>
|
||
<itemizedlist>
|
||
<listitem>
|
||
<para>On-demand self-service: Users can provision servers and
|
||
networks with little human intervention.</para>
|
||
</listitem>
|
||
<listitem>
|
||
<para>Network access: Any computing capabilities are available
|
||
over the network. Many different devices are allowed access
|
||
through standardized mechanisms.</para>
|
||
</listitem>
|
||
<listitem>
|
||
<para>Resource pooling: Multiple users can access clouds that
|
||
serve other consumers according to demand.</para>
|
||
</listitem>
|
||
<listitem>
|
||
<para>Elasticity: Provisioning is rapid and scales out or in
|
||
based on need.</para>
|
||
</listitem>
|
||
<listitem>
|
||
<para>Metered or measured service: Just like utilities that are
|
||
paid for by the hour, clouds should optimize resource use and
|
||
control it for the level of service or type of servers such as
|
||
storage or processing.</para>
|
||
</listitem>
|
||
</itemizedlist>
|
||
<para>Cloud computing offers different service models depending on
|
||
the capabilities a consumer may require.</para>
|
||
<itemizedlist>
|
||
<listitem>
|
||
<para>SaaS: Software as a Service. Provides the consumer the
|
||
ability to use the software in a cloud environment, such as
|
||
web-based email for example.</para>
|
||
</listitem>
|
||
<listitem>
|
||
<para>PaaS: Platform as a Service. Provides the consumer the
|
||
ability to deploy applications through a programming language
|
||
or tools supported by the cloud platform provider. An example
|
||
of platform as a service is an Eclipse/Java programming
|
||
platform provided with no downloads required.</para>
|
||
</listitem>
|
||
<listitem>
|
||
<para>IaaS: Infrastructure as a Service. Provides infrastructure
|
||
such as computer instances, network connections, and storage
|
||
so that people can run any software or operating
|
||
system.</para>
|
||
</listitem>
|
||
</itemizedlist>
|
||
<para>When you hear terms such as public cloud or private cloud,
|
||
these refer to the deployment model for the cloud. A private cloud
|
||
operates for a single organization, but can be managed on-premise
|
||
or off-premise. A public cloud has an infrastructure that is
|
||
available to the general public or a large industry group and is
|
||
likely owned by a cloud services company.</para>
|
||
<para>Clouds can also be described as hybrid. A hybrid cloud can be
|
||
a deployment model, as a composition of both public and private
|
||
clouds, or a hybrid model for cloud computing may involve both
|
||
virtual and physical servers.</para>
|
||
<para>Cloud computing can help with large-scale computing needs or
|
||
can lead consolidation efforts by virtualizing servers to make
|
||
more use of existing hardware and potentially release old hardware
|
||
from service. Cloud computing is also used for collaboration
|
||
because of its high availability through networked computers.
|
||
Productivity suites for word processing, number crunching, and
|
||
email communications, and more are also available through cloud
|
||
computing. Cloud computing also avails additional storage to the
|
||
cloud user, avoiding the need for additional hard drives on each
|
||
user's desktop and enabling access to huge data storage capacity
|
||
online in the cloud.</para>
|
||
<para>Let’s take a peek into OpenStack, see what it means
|
||
technically, its reach and its impact on the entire world.</para>
|
||
<para>OpenStack is an Open source software for building private and
|
||
public clouds which delivers a massively scalable cloud operating
|
||
system.</para>
|
||
<informaltable class="c20">
|
||
<tbody>
|
||
<tr>
|
||
<td rowspan="1" colspan="1">OpenStack is backed up by a global
|
||
community of technologists, developers, researchers,
|
||
corporations and cloud computing experts.</td>
|
||
<td rowspan="1" colspan="1"><inlinemediaobject>
|
||
<imageobject>
|
||
<imagedata fileref="figures/image11.png"/>
|
||
</imageobject>
|
||
</inlinemediaobject></td>
|
||
</tr>
|
||
</tbody>
|
||
</informaltable>
|
||
</chapter>
|