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diff --git a/docs/overview/index.rst b/docs/overview/index.rst new file mode 100644 index 000000000..6b7b66846 --- /dev/null +++ b/docs/overview/index.rst @@ -0,0 +1,12 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) Open Platform for NFV Project, Inc. and its contributors + +******************************** +OPNFV Platform Overview Document +******************************** + +.. toctree:: + :maxdepth: 2 + + ./overview.rst diff --git a/docs/overview/overview.rst b/docs/overview/overview.rst new file mode 100644 index 000000000..26ec052b1 --- /dev/null +++ b/docs/overview/overview.rst @@ -0,0 +1,289 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) Open Platform for NFV Project, Inc. and its contributors + +============ +Introduction +============ + +Network Functions Virtualization (NFV) is transforming the networking industry via +software-defined infrastructures and open source is the proven method for developing +software quickly for commercial products and services that can move markets. +Open Platform for NFV (OPNFV) facilitates the development and evolution of NFV +components across various open source ecosystems. Through system level integration, +deployment and testing, OPNFV constructs a reference NFV platform to accelerate the +transformation of enterprise and service provider networks. +As an open source project, OPNFV is uniquely positioned to bring together the work +of standards bodies, open source communities, and commercial suppliers to deliver a +de facto NFV platform for the industry. + +By integrating components from upstream projects, the community is able to conduct performance +and use case-based testing on a variety of solutions to ensure the platform’s suitability for +NFV use cases. OPNFV also works upstream with other open source communities to bring both contributions +and learnings from its work directly to those communities in the form of blueprints, patches, +and new code. + +OPNFV initially focused on building NFV Infrastructure (NFVI) and Virtualised Infrastructure +Management (VIM) by integrating components from upstream projects such as OpenDaylight, +OpenStack, Ceph Storage, KVM, Open vSwitch, and Linux. +More recently, OPNFV has extended its portfolio of forwarding solutions to include fd.io and ODP, +is able to run on both Intel and ARM commercial and white-box hardware, and includes +Management and Network Orchestration MANO components primarily for application composition +and management in the Colorado release. + +These capabilities, along with application programmable interfaces (APIs) to other NFV +elements, form the basic infrastructure required for Virtualized Network Functions (VNF) +and MANO components. + +Concentrating on these components while also considering proposed projects on additional +topics (such as the MANO components and applications themselves), OPNFV aims to enhance +NFV services by increasing performance and power efficiency improving reliability, +availability and serviceability, and delivering comprehensive platform instrumentation. + +=========================== +OPNFV Platform Architecture +=========================== + +The OPNFV project addresses a number of aspects in the development of a consistent virtualisation +platform including common hardware requirements, software architecture, MANO and applications. + + +OPNFV Platform Overview Diagram + +.. image:: ../images/opnfvplatformgraphic.png + :alt: Overview infographic of the opnfv platform and projects. + + +To address these areas effectively, the OPNFV platform architecture can be decomposed +into the following basic building blocks: + +* Hardware: with the Infra working group, Pharos project and associated activities +* Software Platform: through the platform integration and deployment projects +* MANO: through the MANO working group and associated projects +* Applications: which affect all other areas and drive requirements for OPNFV + +OPNFV Lab Infrastructure +======================== + +The infrastructure working group oversees such topics as lab management, workflow, +definitions, metrics and tools for OPNFV infrastructure. + +Fundamental to the WG is the `Pharos Project <https://www.opnfv.org/developers/pharos>`_ +which provides a set of defined lab infrastructures over a geographically and technically +diverse federated global OPNFV lab. + +Labs may instantiate bare-metal and virtual environments that are accessed remotely by the +community and used for OPNFV platform and feature development, build, deploy and testing. +No two labs are the same and the heterogeneity of the Pharos environment provides the ideal +platform for establishing hardware and software abstractions providing well understood +performance characteristics. + +Community labs are hosted by OPNFV member companies on a voluntary basis. +The Linux Foundation also hosts an OPNFV lab that provides centralized CI +and other production resources which are linked to community labs. +Future lab capabilities will include the ability easily automate deploy and test of any +OPNFV install scenario in any lab environment as well as on a nested "lab as a service" +virtual infrastructure. + +OPNFV Software Platform Architecture +==================================== + +The OPNFV software platform is comprised exclusively of open source implementations of +platform component pieces. OPNFV is able to draw from the rich ecosystem of NFV related +technologies available in open-source then integrate, test, measure and improve these +components in conjunction with our source communities. + +While the composition of the OPNFV software platform is highly complex and constituted of many +projects and components, a subset of these projects gain the most attention from the OPNFV community +to drive the development of new technologies and capabilities. + +--------------------------------- +Virtual Infrastructure Management +--------------------------------- + +OPNFV derives it's virtual infrastructure management from one of our largest upstream ecosystems +OpenStack. OpenStack provides a complete reference cloud management system and associated technologies. +While the OpenStack community sustains a broad set of projects, not all technologies are relevant in +an NFV domain, the OPNFV community consumes a sub-set of OpenStack projects where the usage and +composition may vary depending on the installer and scenario. + +For details on the scenarios available in OPNFV and the specific composition of components +refer to the OPNFV installation instruction: +https://artifacts.opnfv.org/opnfvdocs/colorado/docs/installationprocedure/index.rst + +----------------- +Operating Systems +----------------- + +OPNFV currently uses Linux on all target machines, this can include Ubuntu, Centos or SUSE linux. The +specific version of Linux used for any deployment is documented in the installation guide. + +----------------------- +Networking Technologies +----------------------- + +SDN Controllers +--------------- + +OPNFV, as an NFV focused project, has a significant investment on networking technologies +and provides a broad variety of integrated open source reference solutions. The diversity +of controllers able to be used in OPNFV is supported by a similarly diverse set of +forwarding technologies. + +There are many SDN controllers available today relevant to virtual environments +where the OPNFV community supports and contributes to a number of these. The controllers +being worked on by the community during this release of OPNFV include: + +* Neutron: an OpenStack project to provide “network connectivity as a service” between + interface devices (e.g., vNICs) managed by other OpenStack services (e.g., nova). +* OpenDaylight: addresses multivendor, traditional and greenfield networks, establishing the + industry’s de facto SDN platform and providing the foundation for networks of the future. +* ONOS: a carrier-grade SDN network operating system designed for high availability, + performance, scale-out. + +.. OpenContrail SDN controller is planned to be supported in the next release. + +Data Plane +---------- + +OPNFV extends Linux virtual networking capabilities by using virtual switching +and routing components. The OPNFV community proactively engages with these source +communities to address performance, scale and resiliency needs apparent in carrier +networks. + +* FD.io (Fast data - Input/Output): a collection of several projects and libraries to + amplify the transformation that began with Data Plane Development Kit (DPDK) to support + flexible, programmable and composable services on a generic hardware platform. +* Open vSwitch: a production quality, multilayer virtual switch designed to enable + massive network automation through programmatic extension, while still supporting standard + management interfaces and protocols. + +Deployment Architecture +======================= + +A typical OPNFV deployment starts with three controller nodes running in a high availability +configuration including control plane components from OpenStack, SDN, etc. and a minimum +of two compute nodes for deployment of workloads (VNFs). +A detailed description of the hardware requirements required to support the 5 node configuration +can be found in pharos specification: https://artifacts.opnfv.org/pharos/colorado/docs/specification/index.rst + +In addition to the deployment on a highly available physical infrastructure, OPNFV can be +deployed for development and lab purposes in a virtual environment. In this case each of the hosts +is provided by a virtual machine and allows control and workload placement using nested virtualization. + +The initial deployment is done using a staging server, referred to as the "jumphost". +This server-either physical or virtual-is first installed with the installation program +that then installs OpenStack and other components on the controller nodes and compute nodes. +See the `OPNFV User Guide`_ for more details. + +=========================== +The OPNFV Testing Ecosystem +=========================== + +The OPNFV community has set out to address the needs of virtualization in the carrier +network and as such platform validation and measurements are a cornerstone to the +iterative releases and objectives. + +To simplify the complex task of feature, component and platform validation and characterization +the testing community has established a fully automated method for addressing all key areas of +platform validation. This required the integration of a variety of testing frameworks in our CI +systems, real time and automated analysis of results, storage and publication of key facts for +each run. + + +Release Verification +==================== + +The OPNFV community relies on its testing community to establish release criteria for each OPNFV +release. Each release cycle the testing criteria become more stringent and better representative +of our feature and resiliency requirements. + + +As each OPNFV release establishes a set of deployment scenarios to validate, the testing +infrastructure and test suites need to accommodate these features and capabilities. It’s not +only in the validation of the scenarios themselves where complexity increases, there are test +cases that require multiple datacenters to execute when evaluating features, including multisite +and distributed datacenter solutions. + +The release criteria as established by the testing teams include passing a set of test cases +derived from the functional testing project ‘functest,’ a set of test cases derived from our +platform system and performance test project ‘yardstick,’ and a selection of test cases for +feature capabilities derived from other test projects such as bottlenecks, vsperf, cperf and +storperf. The scenario needs to be able to be deployed, pass these tests, and be removed from +the infrastructure iteratively (no less that 4 times) in order to fulfill the release criteria. + +-------- +Functest +-------- + +Functest provides a functional testing framework incorporating a number of test suites +and test cases that test and verify OPNFV platform functionality. +The scope of Functest and relevant test cases can be found in its +`user guide <http://artifacts.opnfv.org/functest/colorado/docs/userguide/index.html>`_. + +Functest provides both feature project and component test suite integration, leveraging +OpenStack and SDN controllers testing frameworks to verify the key components of the OPNFV +platform are running successfully. + +--------- +Yardstick +--------- + +Yardstick is a testing project for verifying the infrastructure compliance when running VNF applications. +Yardstick benchmarks a number of characteristics and performance vectors on the infrastructure making it +a valuable pre-deployment NFVI testing tools. + +Yardstick provides a flexible testing framework for launching other OPNFV testing projects. + +There are two types of test cases in Yardstick: + +* Yardstick generic test cases and OPNFV feature test cases; + including basic characteristics benchmarking in compute/storage/network area. +* OPNFV feature test cases include basic telecom feature testing from OPNFV projects; + for example nfv-kvm, sfc, ipv6, Parser, Availability and SDN VPN + +System Evaluation and compliance testing +======================================== + +The OPNFV community is developing a set of test suites intended to evaluate a set of reference +behaviors and capabilities for NFV systems developed externally from the OPNFV ecosystem to +evaluate and measure their ability to provide the features and capabilities developed in the +OPNFV ecosystem. + +The Dovetail project will provide a test framework and methodology able to be used on any NFV platform, +including an agreed set of test cases establishing an evaluation criteria for exercising +an OPNFV compatible system. The Dovetail project has begun establishing the test framework +and will provide a preliminary methodology for the Colorado release. Work will continue to +develop these test cases to establish a stand alone compliance evaluation solution +in future releases. + +Additional Testing +================== + +Besides the test suites and cases for release verification, additional testing is performed to validate +specific features or characteristics of the OPNFV platform. +These testing framework and test cases may include some specific needs; such as extended measurements, +additional testing stimuli, or tests simulating environmental disturbances or failures. + +These additional testing activities provide a more complete evaluation of the OPNFV platform. +Some of the projects focused on these testing areas include: + +------ +VSPERF +------ + +VSPERF provides a generic and architecture agnostic vSwitch testing framework and associated tests. +This serves as a basis for validating the suitability of different vSwitch implementations and deployments. + +----------- +Bottlenecks +----------- + +Bottlenecks provides a framework to find system limitations and bottlenecks, providing +root cause isolation capabilities to facilitate system evaluation. + + +.. _`OPNFV Configuration Guide`: http://artifacts.opnfv.org/opnfvdocs/colorado/docs/configguide +.. _`OPNFV User Guide`: http://artifacts.opnfv.org/opnfvdocs/colorado/docs/userguide +.. _Dovetail project: https://wiki.opnfv.org/display/dovetail + |