OpenFlowコントローラとその実装

Transcript

1. OpenFlowίϯτϩʔϥͱ ͦͷ࣮૷ ਗ਼ਫɹᠳ (osho@galibier.org) @oshothebig
2. ໨࣍ • ࣗݾ঺հ • OpenFlowίϯτϩʔϥ঺հ • OpenFlowϓϩτίϧ • ίϯτϩʔϥͷ࣮૷ • ՝୊ • ࠓޙͷํ޲ੑͳͲ΁ͷݸਓతͳݟղ
3. ࣗݾ঺հ • ਗ਼ਫɹᠳ (Twitter: oshothebig) • ๭ࣾݚڀॴۈ຿ • লిྗωοτϫʔΫٕज़ʢओʹɺϧʔςΟϯάʣ • ωοτϫʔΫΞʔΩςΫνϟɺϓϩτίϧ • શޫωοτϫʔΫ, GMPLS, VLAN Tag Swapped Ethernet, ಈత࠶ߏ੒ϓϩηοα, etc.
4. OpenFlowͱͷؔ܎ • 4, 5೥લɺݚڀࣨͷڭत͔Β஌Δ • Galibier OpenFlow Controller • ϒϩά • 300ߦ଍ΒͣͰॻ͚ΔJavaʹΑΔOpenFlowίϯτ ϩʔϥ (http://bit.ly/qXoMGM) • OpenFlowͷϕϯνϚʔΫϓϩάϥϜΛJavaͰॻ͘ (http://bit.ly/pbI3Or)
5. OpenFlowίϯτϩʔϥ࣮૷ • NOX (Nicira) • Trema (NEC) • Beacon (David Erickson, Stanford University) • Floodlight (BigSwitch Networks?) • Maestro (Rice University) • Nettle (Yale University)
6. NOX • Nicira Networks • http://noxrepo.org/ • C++/Python • GPLv3 • ྺ࢙͕͋ΓҰ൪ελϯμʔυ
7. Trema • NEC • https://github.com/trema/trema • C/Ruby • GPLv2 • ίʔυ͕៉ྷ • Ծ૝ωοτϫʔΫػೳͰ࢖͍΍͍͢
8. Beacon • David Erickson (Stanford University) • http://www.beaconcontroller.net/ • Java • GPL v2 and the Stanford University FOSS License Exception v1.0 • τϙϩδσΟεΧόϦʔ, WebΠϯλʔϑΣΠε • 2011/9/12ʹVer. 1.0.0ϦϦʔε
9. Floodlight • Big Switch Networks? • http://www.openflowhub.org/display/Floodlight/ Floodlight+is+a+Java-based+OpenFlow+Controller • Java • Apache License • git://github.com/bigswitch/floodlight.git • ιʔε͸·ͩೖखͰ͖ͳ͍
10. BeaconͱFloodlight • Floodlight͸Beacon͔ΒͷϑΥʔΫ • OSSϥΠηϯεͷҧ͍ͱOSGiґଘͷ༗ແ • Big Switch Networks͕བྷΜͰΔʁ • git://github.com/bigswitch/BeaconMirror.git (Ҏલ) • git://github.com/bigswitch/floodlight.git
11. Maestro • Rice University • http://code.google.com/p/maestro-platform/ • Java • LGPL v2.1 • DAGͰಈ࡞Λهड़Մೳ
12. Nettle • Yale University • http://haskell.cs.yale.edu/?page_id=376 • Haskell • BSD3 • Nettle: Functional Reactive Programming of OpenFlow Networks http://haskell.cs.yale.edu/wp-content/uploads/2011/03/ NettlePADL2011.pdf
13. OpenFlowίϯτϩʔϥͷ࣮૷
14. εΠονͱίϯτϩʔϥ Controller Switch OpenFlow ϓϩτίϧ Applicatioin Application APIΛنఆ Open vSwitch
15. OpenFlowϓϩτίϧ • Ver. 1.0.0࢓༷ॻ http://www.openflow.org/documents/openflow-spec- v1.0.0.pdf ver. type length xid payload Header 22छྨͷϝοηʔδ
16. ϝοηʔδ • Symmetric Message • Hello, Echo, Τϥʔ, ϕϯμʔ֦ு • Controller/Switch Message • ϑϩʔͷ௥Ճ, εΠονͷঢ়ଶऔಘ, ౷ܭऔಘͳͲ • Async Message • Packet in, ϑϩʔͷ࡟আ, ϙʔτͷঢ়ଶ
17. ϋϯυγΣΠΫ Switch Controller ઀ଓ HELLO HELLO FEATURE_REQUEST FEATURE_REPLY
18. ϋϯυγΣΠΫޙ Switch Controller ECHO_REQUEST ECHO_REPLY ECHO_REPLY ECHO_REQUEST ఆظతʹ܁Γฦ͢
19. ະ஌ͷύέοτ͕౸ண Switch Controller ύέοτ౸ண PACKET_IN ܦ࿏ܭࢉͳͲ PACKET_OUT or FLOW_MOD
20. Galibier OpenFlow Controller • ͖͔͚ͬ • Mac্ͰίϯτϩʔϥΛಈ͔͢ͷ͕໘౗ͩͬͨ • Java • OpenFlowϥΠϒϥϦ: openflowj • ඇಉظIO: Netty • http://github.com/oshothebig/galibier
22. ࣮૷ͷϙΠϯτ • ϝοηʔδͷ੾Γग़͠ • ϝοηʔδຖͷಈ࡞γʔέϯε • ΞϓϦέʔγϣϯʹఏڙ͢ΔAPI
23. ϝοηʔδͷ੾Γग़͠ • length (2 bytes)ΛಡΜͰɺϝοηʔδΛ੾Γग़͢ • LengthFieldBasedFrameDecoderΛ࢖༻͢Δͱ؆୯ ver. type length xid payload Header 22छྨͷϝοηʔδ
24. Netty Internal I/O Threads LengthFieldBasedFrameDecoder OpenFlowDecoder OpenFlowEncoder OpenFlowControllerHandler ChannelPipeline ϝοηʔδͷ੾Γग़͠ σγϦΞϥΠζ γϦΞϥΠζ OpenFlowݻ༗ಈ࡞ Controller
25. OpenFlowݻ༗ಈ࡞ • ηογϣϯཱ֬ → HELLOૹ৴ • HELLOड৴ → FEATURE_REQUESTૹ৴ • FEATURE_REPLYड৴ → ϋϯυγΣΠΫ׬ྃ • ECHO_REQUESTड৴ → ECHO_REPLYૹ৴ • ఆظతʹECHO_REQUESTૹ৴
26. HELLOड৴࣌ private void handleHello(OFHello in) { send(factory.getMessage(OFType.FEATURES_REQUEST)); }
27. ΠϕϯτAPI • switchConnected(Switch sw) • switchDisconnected(Switch sw) • handlePacketIn(Switch sw, OFPacketIn msg) • handleFlowRemoved(Switch sw, OFFlowRemoved msg) • handlePortStatus(Switch sw, OFPortStatus msg)
28. Controller Performance ? http://www.openflow.org/wk/index.php/ Controller_Performance_Comparisons
29. Benchmark for controller • Cbench http://www.openflow.org/wk/index.php/Oflops Cbench Controller PACKET_OUT PACKET_IN ఆظతʹ܁Γฦ͢ PACKET_OUT PACKET_IN
30. Netty Internal I/O Threads LengthFieldBasedFrameDecoder OpenFlowDecoder OpenFlowEncoder OpenFlowBenchmarkHandler ChannelPipeline ϝοηʔδͷ੾Γग़͠ σγϦΞϥΠζ γϦΞϥΠζ ϕϯνϚʔΫݻ༗ಈ࡞
31. ίϯτϩʔϥΛ࣮૷ͨ͠ײ૝ • ࢓༷ॻͷهड़͕؁͍Α͏ͳؾ͕͢Δ • OpenFlowεΠονͷೖखੑͷ໰୊ • ී௨ͷਓ͸Open vSwitch͔͠࢖͑ͳ͍ • ։ൃ࣌ʹԾ૝ωοτϫʔΫػೳ͸΍ͬͺΓཉ͍͠ • ͲͷΑ͏ͳAPIΛఏڙ͢Δͷ͔ʁ
32. ՝୊ • ίϯτϩʔϥ͕୯Ұো֐఺ • εέʔϥϏϦςΟʔ • OpenFlowͷࢥ૝ • Logically centralized
33. Onix • OSDI’10Ͱൃද Onix: A Distributed Control Platform for Large-scale Production Networks http://www.usenix.org/event/osdi10/tech/full_papers/ Koponen.pdf • Nicira Networks, Google, NEC • ෼ࢄίϯτϩʔϥ
34. Onix Onix Switch Import / Export NIB Distribution I / E Network Control Logic Switch Import / Export NIB Distribution I / E Network Control Logic Server 1 Server N Managed Physical Network Infrastructure Management Connectivity Network Infrastructure Figure 1: There are four components in an Onix controlled network: managed physical infrastructure, connectivity
35. • Network Information Base (NIB) • ωοτϫʔΫͷεςʔτ͸άϥϑͰදݱͰ͖Δ • ΞϓϦέʔγϣϯಛੑʹ߹ΘͤͨDB • Transactional persistent database • One-hop, eventually-consistent, memory-only DHT Onixͷࢥ૝ 1 Node Forwarding Engine Host Forwarding Table n n Port 1 Network Link 2 1 Figure 2: The default network entity classes provided by Onix’s API. Solid lines represent inheritance, while dashed lines correspond to referential relation between entity instances. The numbers on the dashed lines show the quantitative mapping relationship (e.g., one Link maps to two Ports, and two Ports can map to the same Link). Nodes, ports and links constitute the network topology. All entity classes inherit the same base class providing generic key-value pair access. Category Query Create, dest Access attri Notification Synchronize Configuratio Pull Table 1: Fu
36. OpenFlow΁ͷݸਓతݟղ • ϜʔϒϝϯτΛ࡞Γग़͢ΞϝϦΧͷ͏·͞ • OpenFlowͷίϯηϓτ͸৽͍͠ʁ • OpenFlowϓϩτίϧ͸Ͳ͜·ͰෳࡶԽ͢Δ͔ʁ • සൟͳϓϩτίϧΞοϓσʔτ • ্ҐͷAPI͸ඪ४Խ͞ΕΔ͔൱͔ʁ • ίϯτϩʔϥ=OSͱߟ͑Δͱɾɾɾ
37. ·ͱΊ • ֤छOpenFlowίϯτϩʔϥͷ঺հ • OpenFlowϓϩτίϧུ֓ • OpenFlowίϯτϩʔϥͷ࡞Γํ • ՝୊ͱ෼ࢄίϯτϩʔϥOnixͷ঺հ • ݸਓతݟղ
38. Thank you! osho@galibier.org