Add license info and update structure

This change adds license to all .rst files under userguide.
It also combines all configguide files into user guide.
New reference.rst with list of links.
Updated glossary, removed separate directories for apexlake and yardstick
framework.

Change-Id: I6532ed073905b0fa85a17e759ea7dc3c24acb91f
Signed-off-by: Ana C <ana.cunha@ericsson.com>
(cherry picked from commit 702eebbf78b29fb9046436dd71575b4f210f4731)

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+.. This work is licensed under a Creative Commons Attribution 4.0 International
+.. License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) OPNFV, Ericsson AB and others.
+
+===========
+Methodology
+===========
+
+Abstract
+========
+
+This chapter describes the methodology implemented by the Yardstick project for
+verifying the :term:`NFVI` from the perspective of a :term:`VNF`.
+
+ETSI-NFV
+========
+
+.. _NFV-TST001: https://docbox.etsi.org/ISG/NFV/Open/Drafts/TST001_-_Pre-deployment_Validation/
+.. _Yardsticktst: https://wiki.opnfv.org/_media/opnfv_summit_-_bridging_opnfv_and_etsi.pdf
+
+
+The document ETSI GS NFV-TST001_, "Pre-deployment Testing; Report on Validation
+of NFV Environments and Services", recommends methods for pre-deployment
+testing of the functional components of an NFV environment.
+
+The Yardstick project implements the methodology described in chapter 6, "Pre-
+deployment validation of NFV infrastructure".
+
+The methodology consists in decomposing the typical :term:`VNF` work-load
+performance metrics into a number of characteristics/performance vectors, which
+each can be represented by distinct test-cases.
+
+The methodology includes five steps:
+
+* *Step1:* Define Infrastruture - the Hardware, Software  and corresponding
+   configuration target for validation; the OPNFV infrastructure, in OPNFV
+   community labs.
+
+* *Step2:* Identify :term:`VNF` type - the application for which the
+   infrastructure is to be validated, and its requirements on the underlying
+   infrastructure.
+
+* *Step3:* Select test cases - depending on the workload that represents the
+   application for which the infrastruture is to be validated, the relevant
+   test cases amongst the list of available Yardstick test cases.
+
+* *Step4:* Execute tests - define the duration and number of iterations for the
+   selected test cases, tests runs are automated via OPNFV Jenkins Jobs.
+
+* *Step5:* Collect results - using the common API for result collection.
+
+.. seealso:: Yardsticktst_ for material on alignment ETSI TST001 and Yardstick.
+
+Metrics
+=======
+
+The metrics, as defined by ETSI GS NFV-TST001, are shown in
+:ref:`Table1 <table2_1>`, :ref:`Table2 <table2_2>` and
+:ref:`Table3 <table2_3>`.
+
+In OPNFV Brahmaputra release, generic test cases covering aspects of the listed
+metrics are available; further OPNFV releases will provide extended testing of
+these metrics.
+The view of available Yardstick test cases cross ETSI definitions in
+:ref:`Table1 <table2_1>`, :ref:`Table2 <table2_2>` and :ref:`Table3 <table2_3>`
+is shown in :ref:`Table4 <table2_4>`.
+It shall be noticed that the Yardstick test cases are examples, the test
+duration and number of iterations are configurable, as are the System Under
+Test (SUT) and the attributes (or, in Yardstick nomemclature, the scenario
+options).
+
+.. _table2_1:
+
+**Table 1 - Performance/Speed Metrics**
+
++---------+-------------------------------------------------------------------+
+| Category| Performance/Speed                                                 |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Compute | * Latency for random memory access                                |
+|         | * Latency for cache read/write operations                         |
+|         | * Processing speed (instructions per second)                      |
+|         | * Throughput for random memory access (bytes per second)          |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Network | * Throughput per NFVI node (frames/byte per second)               |
+|         | * Throughput provided to a VM (frames/byte per second)            |
+|         | * Latency per traffic flow                                        |
+|         | * Latency between VMs                                             |
+|         | * Latency between NFVI nodes                                      |
+|         | * Packet delay variation (jitter) between VMs                     |
+|         | * Packet delay variation (jitter) between NFVI nodes              |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Storage | * Sequential read/write IOPS                                      |
+|         | * Random read/write IOPS                                          |
+|         | * Latency for storage read/write operations                       |
+|         | * Throughput for storage read/write operations                    |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+
+.. _table2_2:
+
+**Table 2 - Capacity/Scale Metrics**
+
++---------+-------------------------------------------------------------------+
+| Category| Capacity/Scale                                                    |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Compute | * Number of cores and threads- Available memory size              |
+|         | * Cache size                                                      |
+|         | * Processor utilization (max, average, standard deviation)        |
+|         | * Memory utilization (max, average, standard deviation)           |
+|         | * Cache utilization (max, average, standard deviation)            |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Network | * Number of connections                                           |
+|         | * Number of frames sent/received                                  |
+|         | * Maximum throughput between VMs (frames/byte per second)         |
+|         | * Maximum throughput between NFVI nodes (frames/byte per second)  |
+|         | * Network utilization (max, average, standard deviation)          |
+|         | * Number of traffic flows                                         |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Storage | * Storage/Disk size                                               |
+|         | * Capacity allocation (block-based, object-based)                 |
+|         | * Block size                                                      |
+|         | * Maximum sequential read/write IOPS                              |
+|         | * Maximum random read/write IOPS                                  |
+|         | * Disk utilization (max, average, standard deviation)             |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+
+.. _table2_3:
+
+**Table 3 - Availability/Reliability Metrics**
+
++---------+-------------------------------------------------------------------+
+| Category| Availability/Reliability                                          |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Compute | * Processor availability (Error free processing time)             |
+|         | * Memory availability (Error free memory time)                    |
+|         | * Processor mean-time-to-failure                                  |
+|         | * Memory mean-time-to-failure                                     |
+|         | * Number of processing faults per second                          |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Network | * NIC availability (Error free connection time)                   |
+|         | * Link availability (Error free transmission time)                |
+|         | * NIC mean-time-to-failure                                        |
+|         | * Network timeout duration due to link failure                    |
+|         | * Frame loss rate                                                 |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+| Storage | * Disk availability (Error free disk access time)                 |
+|         | * Disk mean-time-to-failure                                       |
+|         | * Number of failed storage read/write operations per second       |
+|         |                                                                   |
++---------+-------------------------------------------------------------------+
+
+.. _table2_4:
+
+**Table 4 - Yardstick Generic Test Cases**
+
++---------+-------------------+----------------+------------------------------+
+| Category| Performance/Speed | Capacity/Scale | Availability/Reliability     |
+|         |                   |                |                              |
++---------+-------------------+----------------+------------------------------+
+| Compute | TC003 [1]_        | TC003 [1]_     |  TC013 [1]_                  |
+|         | TC004 [1]_        | TC004 [1]_     |  TC015 [1]_                  |
+|         | TC014             | TC010          |                              |
+|         | TC024             | TC012          |                              |
+|         |                   |                |                              |
++---------+-------------------+----------------+------------------------------+
+| Network | TC002             | TC001          |  TC016 [1]_                  |
+|         | TC011             | TC008          |  TC018 [1]_                  |
+|         |                   | TC009          |                              |
+|         |                   |                |                              |
++---------+-------------------+----------------+------------------------------+
+| Storage | TC005             | TC005          |  TC017 [1]_                  |
+|         |                   |                |                              |
++---------+-------------------+----------------+------------------------------+
+
+.. note:: The description in this OPNFV document is intended as a reference for
+  users to understand the scope of the Yardstick Project and the
+  deliverables of the Yardstick framework. For complete description of
+  the methodology, refer to the ETSI document.
+
+.. rubric:: Footnotes
+.. [1] To be included in future deliveries.