openstack/openstack-manuals
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Arch Design: Edits on compute_focus and storage_focus

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Edits to follow conventions.

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Andreas Jaeger 2014-07-25 20:02:09 +02:00
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doc/arch-design/compute_focus/section_prescriptive_examples_compute_focus.xml
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@ -11,7 +11,7 @@
provides particle accelerators and other infrastructure for provides particle accelerators and other infrastructure for
high-energy physics research.</para> high-energy physics research.</para>
<para>As of 2011 CERN operated these two compute centers in Europe <para>As of 2011 CERN operated these two compute centers in Europe
with plans to add a third:</para> with plans to add a third.</para>
<para>To support a growing number of compute heavy users of <para>To support a growing number of compute heavy users of
experiments related to the Large Hadron Collider (LHC) CERN experiments related to the Large Hadron Collider (LHC) CERN
ultimately elected to deploy an OpenStack cloud using ultimately elected to deploy an OpenStack cloud using

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doc/arch-design/compute_focus/section_user_requirements_compute_focus.xml
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@ -1,4 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE section [
<!ENTITY % openstack SYSTEM "../../common/entities/openstack.ent">
%openstack;
]>
<section xmlns="http://docbook.org/ns/docbook" <section xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xlink="http://www.w3.org/1999/xlink"
@ -9,24 +13,33 @@
<para>Compute intensive workloads are defined by their high <para>Compute intensive workloads are defined by their high
utilization of CPU, RAM, or both. User requirements will utilization of CPU, RAM, or both. User requirements will
determine if a cloud must be built to accommodate anticipated determine if a cloud must be built to accommodate anticipated
performance demands.</para> performance demands.
<itemizedlist> </para>
<variablelist>
<varlistentry>
<term>Cost</term>
<listitem> <listitem>
<para>Cost: Cost is not generally a primary concern for a <para>Cost is not generally a primary concern for a
compute-focused cloud, however some organizations compute-focused cloud, however some organizations
might be concerned with cost avoidance. Repurposing might be concerned with cost avoidance. Repurposing
existing resources to tackle compute-intensive tasks existing resources to tackle compute-intensive tasks
instead of needing to acquire additional resources may instead of needing to acquire additional resources may
offer cost reduction opportunities.</para> offer cost reduction opportunities.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Time to market</term>
<listitem> <listitem>
<para>Time to Market: Compute-focused clouds can be used <para>Compute-focused clouds can be used
to deliver products more quickly, for example, to deliver products more quickly, for example,
speeding up a company's software development life cycle speeding up a company's software development life cycle
(SDLC) for building products and applications.</para> (SDLC) for building products and applications.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Revenue opportunity</term>
<listitem> <listitem>
<para>Revenue Opportunity: Companies that are interested <para>Companies that are interested
in building services or products that rely on the in building services or products that rely on the
power of the compute resources will benefit from a power of the compute resources will benefit from a
compute-focused cloud. Examples include the analysis compute-focused cloud. Examples include the analysis
@ -35,7 +48,8 @@
rendering, scientific computation, or rendering, scientific computation, or
simulations.</para> simulations.</para>
</listitem> </listitem>
</itemizedlist> </varlistentry>
</variablelist>
<section xml:id="legal-requirements-compute-focus"> <section xml:id="legal-requirements-compute-focus">
<title>Legal requirements</title> <title>Legal requirements</title>
<para>Many jurisdictions have legislative and regulatory <para>Many jurisdictions have legislative and regulatory
@ -57,33 +71,41 @@
jurisdictions.</para> jurisdictions.</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Data compliance - certain types of information needs <para>Data compliance&mdash;certain types of information needs
to reside in certain locations due to regular issues - to reside in certain locations due to regular issues&mdash;and
and more important cannot reside in other locations more important cannot reside in other locations
for the same reason.</para> for the same reason.</para>
</listitem> </listitem>
</itemizedlist> </itemizedlist>
<para>Examples of such legal frameworks include the data <para>
protection framework of the European Union Examples of such legal frameworks include the <link
(http://ec.europa.eu/justice/data-protection/ ) and the xlink:href="http://ec.europa.eu/justice/data-protection/">data
requirements of the Financial Industry Regulatory Authority protection framework</link> of the European Union and the
(http://www.finra.org/Industry/Regulation/FINRARules/ ) in the requirements of the <link
United States. Consult a local regulatory body for more xlink:href="http://www.finra.org/Industry/Regulation/FINRARules/">Financial
information.</para></section> Industry Regulatory Authority</link> in the United
States. Consult a local regulatory body for more
information.</para></section>
<section xml:id="technical-considerations-compute-focus-user"> <section xml:id="technical-considerations-compute-focus-user">
<title>Technical considerations</title> <title>Technical considerations</title>
<para>The following are some technical requirements that need to <para>The following are some technical requirements that need to
be incorporated into the architecture design.</para> be incorporated into the architecture design.
<itemizedlist> </para>
<variablelist>
<varlistentry>
<term>Performance</term>
<listitem> <listitem>
<para>Performance: If a primary technical concern is for <para>If a primary technical concern is for
the environment to deliver high performance the environment to deliver high performance
capability, then a compute-focused design is an capability, then a compute-focused design is an
obvious choice because it is specifically designed to obvious choice because it is specifically designed to
host compute-intensive workloads.</para> host compute-intensive workloads.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Workload persistence</term>
<listitem> <listitem>
<para>Workload persistence: Workloads can be either <para>Workloads can be either
short-lived or long running. Short-lived workloads short-lived or long running. Short-lived workloads
might include continuous integration and continuous might include continuous integration and continuous
deployment (CI-CD) jobs, where large numbers of deployment (CI-CD) jobs, where large numbers of
@ -104,8 +126,11 @@
workloads is legacy applications that typically are workloads is legacy applications that typically are
persistent over time.</para> persistent over time.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Storage</term>
<listitem> <listitem>
<para>Storage: Workloads targeted for a compute-focused <para>Workloads targeted for a compute-focused
OpenStack cloud generally do not require any OpenStack cloud generally do not require any
persistent block storage (although some usages of persistent block storage (although some usages of
Hadoop with HDFS may dictate the use of persistent Hadoop with HDFS may dictate the use of persistent
@ -118,8 +143,11 @@
scale the object store or shared file system to match scale the object store or shared file system to match
the storage demand.</para> the storage demand.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>User interface</term>
<listitem> <listitem>
<para>User Interface: Like any other cloud architecture, a <para>Like any other cloud architecture, a
compute-focused OpenStack cloud requires an on-demand compute-focused OpenStack cloud requires an on-demand
and self-service user interface. End users must be and self-service user interface. End users must be
able to provision computing power, storage, networks able to provision computing power, storage, networks
@ -127,8 +155,11 @@
scaling the infrastructure up to a substantial level scaling the infrastructure up to a substantial level
without disrupting host operations.</para> without disrupting host operations.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Security</term>
<listitem> <listitem>
<para>Security: Security is going to be highly dependent <para>Security is going to be highly dependent
on the business requirements. For example, a on the business requirements. For example, a
computationally intense drug discovery application computationally intense drug discovery application
will obviously have much higher security requirements will obviously have much higher security requirements
@ -137,11 +168,14 @@
recommendations and guidelines provided in the recommendations and guidelines provided in the
OpenStack Security Guide are applicable.</para> OpenStack Security Guide are applicable.</para>
</listitem> </listitem>
</itemizedlist></section> </varlistentry>
</variablelist>
</section>
<section xml:id="operational-considerations-compute-focus-user"> <section xml:id="operational-considerations-compute-focus-user">
<title>Operational considerations</title> <title>Operational considerations</title>
<para>The compute intensive cloud from the operational perspective <para>The compute intensive cloud from the operational perspective
is similar to the requirements for the general-purpose cloud. is similar to the requirements for the general-purpose cloud.
More details on operational requirements can be found in the More details on operational requirements can be found in the
general-purpose design section.</para></section> general-purpose design section.</para>
</section>
</section> </section>

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doc/arch-design/storage_focus/section_architecture_storage_focus.xml
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@ -1,4 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE section [
<!ENTITY % openstack SYSTEM "../../common/entities/openstack.ent">
%openstack;
]>
<section xmlns="http://docbook.org/ns/docbook" <section xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xlink="http://www.w3.org/1999/xlink"
@ -31,14 +35,19 @@
performance and scalability of the design architecture. A performance and scalability of the design architecture. A
number of different factors must be considered in the design number of different factors must be considered in the design
process:</para> process:</para>
<itemizedlist> <variablelist>
<varlistentry>
<term>Cost</term>
<listitem> <listitem>
<para>Cost: The overall cost of the solution will play a <para>The overall cost of the solution will play a
major role in what storage architecture and the major role in what storage architecture and the
resulting storage hardware that is selected.</para> resulting storage hardware that is selected.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Performance</term>
<listitem> <listitem>
<para>Performance: The performance of the solution, <para>The performance of the solution,
measured by observing the latency of storage I-O measured by observing the latency of storage I-O
requests, also plays a major role. In a requests, also plays a major role. In a
compute-focused OpenStack cloud storage latency could compute-focused OpenStack cloud storage latency could
@ -48,10 +57,11 @@
storage can have a significant impact on the overall storage can have a significant impact on the overall
performance of the application.</para> performance of the application.</para>
</listitem> </listitem>
</itemizedlist> </varlistentry>
<itemizedlist> <varlistentry>
<term>Scalability</term>
<listitem> <listitem>
<para>Scalability: "Scalability" refers to how well the <para>"Scalability" refers to how well the
storage solution performs as it is expanded up to its storage solution performs as it is expanded up to its
maximum size. A storage solution that performs well in maximum size. A storage solution that performs well in
small configurations but has degrading performance as small configurations but has degrading performance as
@ -61,8 +71,11 @@
ability of the storage solution to continue to perform ability of the storage solution to continue to perform
well as it expands is important.</para> well as it expands is important.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Expandability</term>
<listitem> <listitem>
<para>Expandability: Here we are referring to the overall <para>Here we are referring to the overall
ability of the solution to grow. A storage solution ability of the solution to grow. A storage solution
that expands to 50 PB is considered more expandable that expands to 50 PB is considered more expandable
than a solution that only scales to 10 PB. Note that than a solution that only scales to 10 PB. Note that
@ -70,7 +83,8 @@
scalability which is a measure of the solution's scalability which is a measure of the solution's
performance as it expands.</para> performance as it expands.</para>
</listitem> </listitem>
</itemizedlist> </varlistentry>
</variablelist>
<para>Latency is one of the key considerations in a <para>Latency is one of the key considerations in a
storage-focused OpenStack cloud . Using solid-state disks storage-focused OpenStack cloud . Using solid-state disks
(SSDs) to minimize latency for instance storage and reduce CPU (SSDs) to minimize latency for instance storage and reduce CPU
@ -97,9 +111,11 @@
<para>Some potential impacts that might affect a particular <para>Some potential impacts that might affect a particular
storage architecture (and corresponding storage hardware) of a storage architecture (and corresponding storage hardware) of a
Storage-focused OpenStack cloud:</para> Storage-focused OpenStack cloud:</para>
<itemizedlist> <variablelist>
<varlistentry>
<term>Connectivity</term>
<listitem> <listitem>
<para>Connectivity: Based on the storage solution <para>Based on the storage solution
selected, ensure the connectivity matches the storage selected, ensure the connectivity matches the storage
solution requirements. If a centralized storage array solution requirements. If a centralized storage array
is selected it is important to determine how the is selected it is important to determine how the
@ -109,48 +125,70 @@
characteristics will minimize latency to boost the characteristics will minimize latency to boost the
overall performance of the design.</para> overall performance of the design.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Latency</term>
<listitem> <listitem>
<para>Latency: Determine if the use case will have <para>Determine if the use case will have
consistent or highly variable latency.</para> consistent or highly variable latency.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Throughput</term>
<listitem> <listitem>
<para>Throughput: Ensure that the storage solution <para>Ensure that the storage solution
throughput is optimized based on application throughput is optimized based on application
requirements.</para> requirements.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Server hardware</term>
<listitem> <listitem>
<para>Server Hardware: Use of DAS impacts the server <para>Use of DAS impacts the server
hardware choice and affects host density, instance hardware choice and affects host density, instance
density, power density, OS-hypervisor, and management density, power density, OS-hypervisor, and management
tools, to name a few.</para> tools, to name a few.</para>
</listitem> </listitem>
</itemizedlist> </varlistentry>
</variablelist>
<section xml:id="compute-server-hardware-selection"> <section xml:id="compute-server-hardware-selection">
<title>Compute (server) hardware selection</title> <title>Compute (server) hardware selection</title>
<para>Compute (server) hardware must be evaluated against four <para>Compute (server) hardware must be evaluated against four
opposing dimensions:</para> opposing dimensions:</para>
<itemizedlist> <variablelist>
<varlistentry>
<term>Server density</term>
<listitem> <listitem>
<para>Server density: A measure of how many servers can <para>A measure of how many servers can
fit into a given measure of physical space, such as a fit into a given measure of physical space, such as a
rack unit [U].</para> rack unit [U].</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Resource capacity</term>
<listitem> <listitem>
<para>Resource capacity: The number of CPU cores, how much <para>The number of CPU cores, how much
RAM, or how much storage a given server will RAM, or how much storage a given server will
deliver.</para> deliver.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Expandability</term>
<listitem> <listitem>
<para>Expandability: The number of additional resources <para>The number of additional resources
that can be added to a server before it has reached that can be added to a server before it has reached
its limit.</para> its limit.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Cost</term>
<listitem> <listitem>
<para>Cost: The relative of the hardware weighted against <para>The relative of the hardware weighted against
the level of design effort needed to build the the level of design effort needed to build the
system.</para> system.</para>
</listitem> </listitem>
</itemizedlist> </varlistentry>
</variablelist>
<para>The dimensions need to be weighed against each other to <para>The dimensions need to be weighed against each other to
determine the best design for the desired purpose. For determine the best design for the desired purpose. For
example, increasing server density can mean sacrificing example, increasing server density can mean sacrificing
@ -231,31 +269,40 @@
<para>Other factors that will strongly influence server hardware <para>Other factors that will strongly influence server hardware
selection for a storage-focused OpenStack design selection for a storage-focused OpenStack design
architecture:</para> architecture:</para>
<itemizedlist> <variablelist>
<varlistentry>
<term>Instance density</term>
<listitem> <listitem>
<para>Instance density: In this architecture, instance <para>In this architecture, instance
density and CPU-RAM oversubscription are lower. More density and CPU-RAM oversubscription are lower. More
hosts will be required to support the anticipated hosts will be required to support the anticipated
scale, especially if the design uses dual-socket scale, especially if the design uses dual-socket
hardware designs.</para> hardware designs.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Host density</term>
<listitem> <listitem>
<para>Host density: Another option to address the higher <para>Another option to address the higher
host count is to use a quad socket platform. Taking host count is to use a quad socket platform. Taking
this approach will decrease host density which also this approach will decrease host density which also
increases rack count. This configuration affects the increases rack count. This configuration affects the
number of power connections and also impacts network number of power connections and also impacts network
and cooling requirements.</para> and cooling requirements.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Power and cooling density</term>
<listitem> <listitem>
<para>Power and cooling density: The power and cooling <para>The power and cooling
density requirements might be lower than with blade, density requirements might be lower than with blade,
sled, or 1U server designs due to lower host density sled, or 1U server designs due to lower host density
(by using 2U, 3U or even 4U server designs). For data (by using 2U, 3U or even 4U server designs). For data
centers with older infrastructure, this might be a centers with older infrastructure, this might be a
desirable feature.</para> desirable feature.</para>
</listitem> </listitem>
</itemizedlist> </varlistentry>
</variablelist>
<para>Storage-focused OpenStack design architecture server <para>Storage-focused OpenStack design architecture server
hardware selection should focus on a "scale up" versus "scale hardware selection should focus on a "scale up" versus "scale
out" solution. The determination of which will be the best out" solution. The determination of which will be the best
@ -267,17 +314,22 @@
<title>Networking hardware selection</title> <title>Networking hardware selection</title>
<para>Some of the key considerations that should be included in <para>Some of the key considerations that should be included in
the selection of networking hardware include:</para> the selection of networking hardware include:</para>
<itemizedlist> <variablelist>
<varlistentry>
<term>Port count</term>
<listitem> <listitem>
<para>Port count: The user will require networking <para>The user will require networking
hardware that has the requisite port count.</para> hardware that has the requisite port count.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Port density</term>
<listitem> <listitem>
<para>Port density: The network design will be affected by <para>The network design will be affected by
the physical space that is required to provide the the physical space that is required to provide the
requisite port count. A switch that can provide 48 10 requisite port count. A switch that can provide 48 10&nbsp;GbE
GbE ports in 1U has a much higher port density than a ports in 1U has a much higher port density than a
switch that provides 24 10 GbE ports in 2U. On a switch that provides 24 10&nbsp;GbE ports in 2U. On a
general scale, a higher port density leaves more rack general scale, a higher port density leaves more rack
space for compute or storage components which is space for compute or storage components which is
preferred. It is also important to consider fault preferred. It is also important to consider fault
@ -285,13 +337,19 @@
switches are more expensive, therefore it is important switches are more expensive, therefore it is important
not to over design the network.</para> not to over design the network.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Port speed</term>
<listitem> <listitem>
<para>Port speed: The networking hardware must support the <para>The networking hardware must support the
proposed network speed, for example: 1 GbE, 10 GbE, or proposed network speed, for example: 1&nbsp;GbE, 10&nbsp;GbE, or
40 GbE (or even 100 GbE).</para> 40&nbsp;GbE (or even 100&nbsp;GbE).</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Redundancy</term>
<listitem> <listitem>
<para>Redundancy: The level of network hardware redundancy <para>The level of network hardware redundancy
required is influenced by the user requirements for required is influenced by the user requirements for
high availability and cost considerations. Network high availability and cost considerations. Network
redundancy can be achieved by adding redundant power redundancy can be achieved by adding redundant power
@ -300,22 +358,30 @@
User requirements will determine if a completely User requirements will determine if a completely
redundant network infrastructure is required.</para> redundant network infrastructure is required.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Power requirements</term>
<listitem> <listitem>
<para>Power requirements: Make sure that the physical data <para>Make sure that the physical data
center provides the necessary power for the selected center provides the necessary power for the selected
network hardware. This is not typically an issue for network hardware. This is not typically an issue for
top of rack (ToR) switches, but may be an issue for top of rack (ToR) switches, but may be an issue for
spine switches in a leaf and spine fabric, or end of spine switches in a leaf and spine fabric, or end of
row (EoR) switches.</para> row (EoR) switches.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Protocol support</term>
<listitem> <listitem>
<para>Protocol support: It is possible to gain even more <para>It is possible to gain even more
performance out of a single storage system by using performance out of a single storage system by using
specialized network technologies such as RDMA, SRP, specialized network technologies such as RDMA, SRP,
iSER and SCST. The specifics for using these iSER and SCST. The specifics for using these
technologies is beyond the scope of this book.</para> technologies is beyond the scope of this book.</para>
</listitem> </listitem>
</itemizedlist></section> </varlistentry>
</variablelist>
</section>
<section xml:id="software-selection-arch-storage"> <section xml:id="software-selection-arch-storage">
<title>Software selection</title> <title>Software selection</title>
<para>Selecting software to be included in a storage-focused <para>Selecting software to be included in a storage-focused
@ -346,9 +412,11 @@
support it.</para> support it.</para>
<para>Some areas that could be impacted by the selection of OS and <para>Some areas that could be impacted by the selection of OS and
hypervisor include:</para> hypervisor include:</para>
<itemizedlist> <variablelist>
<varlistentry>
<term>Cost</term>
<listitem> <listitem>
<para>Cost: Selection of a commercially supported <para>Selection of a commercially supported
hypervisor, such as Microsoft Hyper-V, will result in hypervisor, such as Microsoft Hyper-V, will result in
a different cost model rather than selected a a different cost model rather than selected a
community-supported open source hypervisor like community-supported open source hypervisor like
@ -358,8 +426,11 @@
requirements might dictate a specific or commercially requirements might dictate a specific or commercially
supported hypervisor.</para> supported hypervisor.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Supportability</term>
<listitem> <listitem>
<para>Supportability: Whichever hypervisor is chosen, the <para>Whichever hypervisor is chosen, the
staff needs to have appropriate training and knowledge staff needs to have appropriate training and knowledge
to support the selected OS and hypervisor combination. to support the selected OS and hypervisor combination.
If they do not training will need to be provided, If they do not training will need to be provided,
@ -372,8 +443,11 @@
resources. Either decision has a cost that will have resources. Either decision has a cost that will have
an impact on the design.</para> an impact on the design.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Management tools</term>
<listitem> <listitem>
<para>Management tools: The management tools used for <para>The management tools used for
Ubuntu and Kinstance differ from the management tools Ubuntu and Kinstance differ from the management tools
for VMware vSphere. Although both OS and hypervisor for VMware vSphere. Although both OS and hypervisor
combinations are supported by OpenStack, there will combinations are supported by OpenStack, there will
@ -381,16 +455,22 @@
design as a result of the selection of one combination design as a result of the selection of one combination
versus the other.</para> versus the other.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Scale and performance</term>
<listitem> <listitem>
<para>Scale and performance: Make sure that selected OS <para>Make sure that selected OS
and hypervisor combination meet the appropriate scale and hypervisor combination meet the appropriate scale
and performance requirements needed for this general and performance requirements needed for this general
purpose OpenStack cloud. The chosen architecture will purpose OpenStack cloud. The chosen architecture will
need to meet the targeted instance-host ratios with need to meet the targeted instance-host ratios with
the selected OS-hypervisor combination.</para> the selected OS-hypervisor combination.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Security</term>
<listitem> <listitem>
<para>Security: Make sure that the design can accommodate <para>Make sure that the design can accommodate
the regular periodic installation of application the regular periodic installation of application
security patches while maintaining the required security patches while maintaining the required
workloads. The frequency of security patches for the workloads. The frequency of security patches for the
@ -398,8 +478,11 @@
on performance and the patch installation process on performance and the patch installation process
could affect maintenance windows.</para> could affect maintenance windows.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Supported features</term>
<listitem> <listitem>
<para>Supported features: Determine what features of <para>Determine what features of
OpenStack are required. This will often determine the OpenStack are required. This will often determine the
selection of the OS-hypervisor combination. Certain selection of the OS-hypervisor combination. Certain
features are only available with specific OSs or features are only available with specific OSs or
@ -407,8 +490,11 @@
available, the design might need to be modified to available, the design might need to be modified to
meet the user requirements.</para> meet the user requirements.</para>
</listitem> </listitem>
</varlistentry>
<varlistentry>
<term>Interoperability</term>
<listitem> <listitem>
<para>Interoperability: Consideration should be given to <para>Consideration should be given to
the ability of the selected OS-hypervisor combination the ability of the selected OS-hypervisor combination
to interoperate or co-exist with other OS-hypervisors to interoperate or co-exist with other OS-hypervisors
,or other software solutions in the overall design, if ,or other software solutions in the overall design, if
@ -419,7 +505,9 @@
address if the two sets of tools need to interoperate. address if the two sets of tools need to interoperate.
</para> </para>
</listitem> </listitem>
</itemizedlist></section> </varlistentry>
</variablelist>
</section>
<section xml:id="openstack-components-arch-storage"> <section xml:id="openstack-components-arch-storage">
<title>OpenStack components</title> <title>OpenStack components</title>
<para>The selection of OpenStack components has a significant <para>The selection of OpenStack components has a significant
@ -439,36 +527,36 @@
following components would typically be used:</para> following components would typically be used:</para>
<itemizedlist> <itemizedlist>
<listitem> <listitem>
<para>Keystone</para> <para>OpenStack Identity (keystone)</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Horizon</para> <para>OpenStack dashboard (horizon)</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Nova (including the use of multiple hypervisor <para>OpenStack Compute (nova) (including the use of multiple hypervisor
drivers)</para> drivers)</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Swift (or another object storage solution)</para> <para>OpenStack Object Storage (swift) (or another object storage solution)</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Cinder</para> <para>OpenStack Block Storage (cinder)</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Glance</para> <para>OpenStack Image Service (glance)</para>
</listitem> </listitem>
<listitem> <listitem>
<para>Neutron or nova-network</para> <para>OpenStack Networking (neutron) or nova-network</para>
</listitem> </listitem>
</itemizedlist> </itemizedlist>
<para>The exclusion of certain OpenStack components may limit or <para>The exclusion of certain OpenStack components may limit or
constrain the functionality of other components. If a design constrain the functionality of other components. If a design
opts to include Heat but exclude Ceilometer, then the design opts to include Orchestration but exclude Telemetry, then the design
will not be able to take advantage of Heat's auto scaling will not be able to take advantage of Orchestration's auto scaling
functionality (which relies on information from Ceilometer). functionality (which relies on information from Telemetry).
Due to the fact that you can use Heat to spin up a large Due to the fact that you can use Orchestration to spin up a large
number of instances to perform the compute-intensive number of instances to perform the compute-intensive
processing, including Heat in a compute-focused architecture processing, including Orchestration in a compute-focused architecture
design is strongly recommended.</para></section> design is strongly recommended.</para></section>
<section xml:id="supplemental-software-arch-storage"> <section xml:id="supplemental-software-arch-storage">
<title>Supplemental software</title> <title>Supplemental software</title>
@ -478,18 +566,21 @@
any given OpenStack design.</para></section> any given OpenStack design.</para></section>
<section xml:id="networking-software-arch-storage"> <section xml:id="networking-software-arch-storage">
<title>Networking software</title> <title>Networking software</title>
<para>OpenStack Neutron provides a wide variety of networking <para>OpenStack Networking (neutron) provides a wide variety of networking
services for instances. There are many additional networking services for instances. There are many additional networking
software packages that may be useful to manage the OpenStack software packages that may be useful to manage the OpenStack
components themselves. Some examples include HAProxy, components themselves. Some examples include HAProxy,
keepalived, and various routing daemons (like Quagga). Some of keepalived, and various routing daemons (like Quagga). Some of
these software packages, HAProxy in particular, are described these software packages, HAProxy in particular, are described
in more detail in the OpenStack HA Guide (refer to Chapter 8 in more detail in the <citetitle>OpenStack High Availability
of the OpenStack High Availability Guide). For a general Guide</citetitle> (refer to the <link
purpose OpenStack cloud, it is reasonably likely that the xlink:href="http://docs.openstack.org/high-availability-guide/content/ch-network.html">Network
OpenStack infrastructure components will need to be highly controller cluster stack chapter</link> of the OpenStack High
available, and therefore networking software packages like Availability Guide). For a general purpose OpenStack cloud, it
HAProxy will need to be included.</para></section> is reasonably likely that the OpenStack infrastructure
components will need to be highly available, and therefore
networking software packages like HAProxy will need to be
included.</para></section>
<section xml:id="management-software-arch-storage"> <section xml:id="management-software-arch-storage">
<title>Management software</title> <title>Management software</title>
<para>This includes software for providing clustering, logging, <para>This includes software for providing clustering, logging,
@ -504,8 +595,8 @@
Therefore, the impact of including (or not including) these Therefore, the impact of including (or not including) these
software packages is determined by the availability of the software packages is determined by the availability of the
cloud infrastructure and the complexity of supporting the cloud infrastructure and the complexity of supporting the
configuration after it is deployed. The OpenStack High configuration after it is deployed. The <citetitle>OpenStack High
Availability Guide provides more details on the installation Availability Guide</citetitle> provides more details on the installation
and configuration of Corosync and Pacemaker, should these and configuration of Corosync and Pacemaker, should these
packages need to be included in the design.</para> packages need to be included in the design.</para>
<para>Requirements for logging, monitoring, and alerting are <para>Requirements for logging, monitoring, and alerting are
@ -526,7 +617,7 @@
design impacts include:</para> design impacts include:</para>
<itemizedlist> <itemizedlist>
<listitem> <listitem>
<para>OS - Hypervisor combination: Ensure that the <para>OS-Hypervisor combination: Ensure that the
selected logging, monitoring, or alerting tools selected logging, monitoring, or alerting tools
support the proposed OS-hypervisor combination.</para> support the proposed OS-hypervisor combination.</para>
</listitem> </listitem>
@ -545,7 +636,7 @@
of the OpenStack services.</para> of the OpenStack services.</para>
<para>MySQL is generally considered to be the de facto database <para>MySQL is generally considered to be the de facto database
for OpenStack, however, other compatible databases are also for OpenStack, however, other compatible databases are also
known to work. Note, however, that Ceilometer uses known to work. Note, however, that Telemetry uses
MongoDB.</para> MongoDB.</para>
<para>The solution selected to provide high availability for the <para>The solution selected to provide high availability for the
database will change based on the selected database. If MySQL database will change based on the selected database. If MySQL
@ -570,4 +661,6 @@
components might require it depending on the specific components might require it depending on the specific
implementation.</para> implementation.</para>
</listitem> </listitem>
</itemizedlist></section></section> </itemizedlist>
</section>
</section>

17
doc/arch-design/storage_focus/section_user_requirements_storage_focus.xml
View File

@ -58,13 +58,16 @@
other locations for the same reason.</para> other locations for the same reason.</para>
</listitem> </listitem>
</itemizedlist> </itemizedlist>
<para>Examples of such legal frameworks include the data <para>
protection framework of the European Union Examples of such legal frameworks include the <link
(http://ec.europa.eu/justice/data-protection/ ) and the xlink:href="http://ec.europa.eu/justice/data-protection/">data
requirements of the Financial Industry Regulatory Authority protection framework</link> of the European Union and the
(http://www.finra.org/Industry/Regulation/FINRARules/ ) in the requirements of the <link
United States. Consult a local regulatory body for more xlink:href="http://www.finra.org/Industry/Regulation/FINRARules/">Financial
information.</para></section> Industry Regulatory Authority</link> in the United
States. Consult a local regulatory body for more information.
</para>
</section>
<section xml:id="technical-requirements-storage-focus"> <section xml:id="technical-requirements-storage-focus">
<title>Technical requirements</title> <title>Technical requirements</title>
<para>The following are some technical requirements that could be <para>The following are some technical requirements that could be