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diff --git a/docs/testing/user/userguide/12-nsb-overview.rst b/docs/testing/user/userguide/12-nsb-overview.rst new file mode 100644 index 000000000..71a5c1130 --- /dev/null +++ b/docs/testing/user/userguide/12-nsb-overview.rst @@ -0,0 +1,206 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International +.. License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) OPNFV, 2016-2017 Intel Corporation. + +=================================== +Network Services Benchmarking (NSB) +=================================== + +Abstract +======== + +.. _Yardstick: https://wiki.opnfv.org/yardstick + +This chapter provides an overview of the NSB, a contribution to OPNFV +Yardstick_ from Intel. + +Overview +======== + +The goal of NSB is to Extend Yardstick to perform real world VNFs and NFVi +Characterization and benchmarking with repeatable and deterministic methods. + +The Network Service Benchmarking (NSB) extends the yardstick framework to do +VNF characterization and benchmarking in three different execution +environments - bare metal i.e. native Linux environment, standalone virtual +environment and managed virtualized environment (e.g. Open stack etc.). +It also brings in the capability to interact with external traffic generators +both hardware & software based for triggering and validating the traffic +according to user defined profiles. + +NSB extension includes: + + - Generic data models of Network Services, based on ETSI spec `ETSI GS NFV-TST 001 <http://www.etsi.org/deliver/etsi_gs/NFV-TST/001_099/001/01.01.01_60/gs_nfv-tst001v010101p.pdf>`_ + + - New Standalone context for VNF testing like SRIOV, OVS, OVS-DPDK etc + + - Generic VNF configuration models and metrics implemented with Python + classes + + - Traffic generator features and traffic profiles + + - L1-L3 state-less traffic profiles + + - L4-L7 state-full traffic profiles + + - Tunneling protocol / network overlay support + + - Test case samples + + - Ping + + - Trex + + - vPE,vCGNAT, vFirewall etc - ipv4 throughput, latency etc + + - Traffic generators like Trex, ab/nginx, ixia, iperf etc + + - KPIs for a given use case: + + - System agent support for collecting NFVi KPI. This includes: + + - CPU statistic + + - Memory BW + + - OVS-DPDK Stats + + - Network KPIs, e.g., inpackets, outpackets, thoughput, latency etc + + - VNF KPIs, e.g., packet_in, packet_drop, packet_fwd etc + +Architecture +============ + +The Network Service (NS) defines a set of Virtual Network Functions (VNF) +connected together using NFV infrastructure. + +The Yardstick NSB extension can support multiple VNFs created by different +vendors including traffic generators. Every VNF being tested has its +own data model. The Network service defines a VNF modelling on base of +performed network functionality. The part of the data model is a set of the +configuration parameters, number of connection points used and flavor including +core and memory amount. + +The ETSI defines a Network Service as a set of configurable VNFs working in +some NFV Infrastructure connecting each other using Virtual Links available +through Connection Points. The ETSI MANO specification defines a set of +management entities called Network Service Descriptors (NSD) and +VNF Descriptors (VNFD) that define real Network Service. The picture below +makes an example how the real Network Operator use-case can map into ETSI +Network service definition + +Network Service framework performs the necessary test steps. It may involve + + - Interacting with traffic generator and providing the inputs on traffic + type / packet structure to generate the required traffic as per the + test case. Traffic profiles will be used for this. + + - Executing the commands required for the test procedure and analyses the + command output for confirming whether the command got executed correctly + or not. E.g. As per the test case, run the traffic for the given + time period / wait for the necessary time delay + + - Verify the test result. + + - Validate the traffic flow from SUT + + - Fetch the table / data from SUT and verify the value as per the test case + + - Upload the logs from SUT onto the Test Harness server + + - Read the KPI's provided by particular VNF + +Components of Network Service +----------------------------- + + * *Models for Network Service benchmarking*: The Network Service benchmarking + requires the proper modelling approach. The NSB provides models using Python + files and defining of NSDs and VNFDs. + + The benchmark control application being a part of OPNFV yardstick can call + that python models to instantiate and configure the VNFs. Depending on + infrastructure type (bare-metal or fully virtualized) that calls could be + made directly or using MANO system. + + * *Traffic generators in NSB*: Any benchmark application requires a set of + traffic generator and traffic profiles defining the method in which traffic + is generated. + + The Network Service benchmarking model extends the Network Service + definition with a set of Traffic Generators (TG) that are treated + same way as other VNFs being a part of benchmarked network service. + Same as other VNFs the traffic generator are instantiated and terminated. + + Every traffic generator has own configuration defined as a traffic profile + and a set of KPIs supported. The python models for TG is extended by + specific calls to listen and generate traffic. + + * *The stateless TREX traffic generator*: The main traffic generator used as + Network Service stimulus is open source TREX tool. + + The TREX tool can generate any kind of stateless traffic. + + .. code-block:: console + + +--------+ +-------+ +--------+ + | | | | | | + | Trex | ---> | VNF | ---> | Trex | + | | | | | | + +--------+ +-------+ +--------+ + + Supported testcases scenarios: + + - Correlated UDP traffic using TREX traffic generator and replay VNF. + + - using different IMIX configuration like pure voice, pure video traffic etc + + - using different number IP flows like 1 flow, 1K, 16K, 64K, 256K, 1M flows + + - Using different number of rules configured like 1 rule, 1K, 10K rules + + For UDP correlated traffic following Key Performance Indicators are collected + for every combination of test case parameters: + + - RFC2544 throughput for various loss rate defined (1% is a default) + +Graphical Overview +================== + +NSB Testing with yardstick framework facilitate performance testing of various +VNFs provided. + +.. code-block:: console + + +-----------+ + | | +-----------+ + | vPE | ->|TGen Port 0| + | TestCase | | +-----------+ + | | | + +-----------+ +------------------+ +-------+ | + | | -- API --> | VNF | <---> + +-----------+ | Yardstick | +-------+ | + | Test Case | --> | NSB Testing | | + +-----------+ | | | + | | | | + | +------------------+ | + +-----------+ | +-----------+ + | Traffic | ->|TGen Port 1| + | patterns | +-----------+ + +-----------+ + + Figure 1: Network Service - 2 server configuration + +VNFs supported for chracterization: +----------------------------------- + +1. CGNAPT - Carrier Grade Network Address and port Translation +2. vFW - Virtual Firewall +3. vACL - Access Control List +4. Prox - Packet pROcessing eXecution engine: + - VNF can act as Drop, Basic Forwarding (no touch), + L2 Forwarding (change MAC), GRE encap/decap, Load balance based on + packet fields, Symmetric load balancing + - QinQ encap/decap IPv4/IPv6, ARP, QoS, Routing, Unmpls, Policing, ACL +5. UDP_Replay |