OpenFlowコントローラを取り巻く状況とその実装

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1. OpenFlowίϯτϩʔϥΛ औΓר͘ঢ়گͱͦͷ࣮૷ ਗ਼ਫɹᠳ (@oshothebig)
2. ࣗݾ঺հ • ਗ਼ਫɹᠳ • ෋࢜௨ݚڀॴۈ຿ • লిྗωοτϫʔΫٕज़ • ωοτϫʔΫΞʔΩςΫνϟɺϓϩτίϧ • શޫωοτϫʔΫ, GMPLS, VLAN tag swapped Ethernet, ಈత࠶ߏ੒ϓϩηοα, etc.
3. OpenFlowͱͷؔ܎ • Galibier OpenFlow Controller • https://github.com/oshothebig/galibier • ϒϩά • 300ߦ଍ΒͣͰॻ͚ΔJavaʹΑΔOpenFlowίϯτ ϩʔϥ (http://bit.ly/qXoMGM) • OpenFlowͷϕϯνϚʔΫϓϩάϥϜΛJavaͰॻ͘ (http://bit.ly/pbI3Or)
4. OpenFlowͷߏ੒ Controller Switch OpenFlow ϓϩτίϧ Application Application Application Switch Switch Switch
5. OpenFlowεΠον ιϑτ΢ΣΞ࣮૷ ϋʔυ΢ΣΞ࣮૷ • Reference Implementation • Open vSwitch • NEC UNIVERGE PF5240/ PF5820 • Pronto Systems 3240/3290 • IBM RackSwitch G8264 • HP 3500/5400/8200
6. OpenFlowίϯτϩʔϥ Φʔϓϯιʔε ঎༻ NOX Trema Beacon/Floodlight Ryu NodeFlow etc. NEC Nicira Networks Big Switch Networks Midokura NTT Data etc.
7. NOX • http://noxrepo.org/ • GPL v3 • Nicira Networks͕ओಋ • C++/Python • ࠷΋ྺ࢙ͷ͋Δίϯτϩʔϥ • ελϯϑΥʔυେֶΩϟϯύε಺Ͱ࢖༻ • ࠷ۙɺ։ൃ͕ఀ଺ؾຯʁ • 2011/1/1Ҏ߱ͷίϛοτ਺͕53
8. Trema • https://github.com/trema/trema • GPL v2 • NEC͕։ൃΛओಋ • C/Ruby • ϑϧελοΫ • 1୆ͷPCͰ։ൃ͕׬݁ • ؆ܿͳهड़ͰΞϓϦέʔγϣϯ͕هड़Մೳ
9. Beacon/Floodlight Beacon Floodlight ྫ֎৚߲෇͖GPL v2 Apache License Version 2.0 Java Java David Erickson (Stanford) Big Switch Networks • http://www.beaconcontroller.net/ (Beacon) http://floodlight.openflowhub.org/ (Floodlight) • ඇಉظIOΛ༻͍ͯߴύϑΥʔϚϯε 600ສ Flow req/sec Ҏ্@4εϨου࢖༻࣌ (Beacon)
10. Ryu • http://www.osrg.net/ryu/ • GPL v3 • NTT(αΠόʔιϦϡʔγϣϯݚڀॴ?)ͱVA Linuxओಋ • Pure Python • OpenStackͷ࿈ܞ
11. NodeFlow • http://github.com/gaberger/NodeFLow • MIT Licenes • Gary Berger • JavaScript (for Node.js)
12. ίϯτϩʔϥؔ࿈ͷಈ޲
13. ίϯτϩʔϥ૬ؔਤ Floodlight Big Switch BigController? Trema NEC UNIVERGE PF NOX Nicira NVP? εςϧεϞʔυނɺṖ
14. FloodlightͷϦϦʔε • 12݄ޙ൒ʹιʔείʔυ͕ެ։ https://github.com/floodlight/floodlight • Beacon͔ΒϑΥʔΫ • ϥΠηϯεͷҧ͍ • OSGi΁ͷґଘΛআڈʢϞδϡʔϧγεςϜ࣮૷தʣ • NettyΛ࢖༻͢ΔΑ͏ʹͳͬͨ • ΞϓϦืूத→TγϟπϓϨθϯτத
15. FloodlightͷϦϦʔε • 12݄ޙ൒ʹιʔείʔυ͕ެ։ https://github.com/floodlight/floodlight • Beacon͔ΒϑΥʔΫ • ϥΠηϯεͷҧ͍ • OSGi΁ͷґଘΛআڈʢϞδϡʔϧγεςϜ࣮૷தʣ • NettyΛ࢖༻͢ΔΑ͏ʹͳͬͨ • ΞϓϦืूத→TγϟπϓϨθϯτத
16. Nicira Networksͷಈ͖ • 2݄ʹεςϧεϞʔυΛऴ͑Δ༧ఆ (by Publickey) http://www.publickey1.jp/blog/11/nicira_networks.html • NTTͱڞಉͰϥΠϒϚΠάϨʔγϣϯ࣮ݧ http://www.ntt.co.jp/news2011/1108/110802a.html • Nicira Virtualization Platform (NVP) http://cn.teldevice.co.jp/product/nicira/nicira_nvp/ index.html
17. 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, UC Berkeley • ෼ࢄίϯτϩʔϥ • ZookeeperΛ࢖༻࣮ͯ͠૷ • 15ສߦͷC++ίʔυ
18. 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
19. • 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
20. OpenFlowίϯτϩʔϥͷ࣮૷
21. ඞཁͳಈ࡞ • ϝοηʔδͷ੾Γग़͠ • ϋϯυγΣΠΫॲཧ • ίωΫγϣϯͷҡ࣋ • εΠον͔ΒૹΒΕͯ͘Δϝοηʔδ΁ͷԠ౴
22. ϝοηʔδ • Symmetric Message • Hello, Echo, Τϥʔ, ϕϯμʔ֦ு • Controller/Switch Message • ϑϩʔͷ௥Ճ, εΠονͷঢ়ଶऔಘ, ౷ܭऔಘͳͲ • Async Message • Packet in, ϑϩʔͷ࡟আ, ϙʔτͷঢ়ଶͷมߋ
23. ϝοηʔδͷ੾Γग़͠ • length (2 bytes)ΛಡΜͰɺϝοηʔδΛ੾Γग़͢ • NettyͩͱLengthFieldBasedFrameDecoder͕࢖͑Δ • FloodlightͰ͸࢖͍ͬͯͳ͍ ver. type length xid payload Header 22छྨͷϝοηʔδ
24. FloodlightͰͷϝοηʔδॲཧ Netty Internal I/O Threads OFMessageDecoder OFMessageEncoder OFChannelHandler ChannelPipeline σγϦΞϥΠζ γϦΞϥΠζ OpenFlowݻ༗ಈ࡞ Controller
25. ϋϯυγΣΠΫ Switch Controller
26. ϋϯυγΣΠΫ Switch Controller ઀ଓ
27. ϋϯυγΣΠΫ Switch Controller ઀ଓ HELLO HELLO
28. ϋϯυγΣΠΫ Switch Controller ઀ଓ HELLO HELLO FEATURE_REQUEST FEATURE_REPLY
29. ϋϯυγΣΠΫޙ Switch Controller
30. ϋϯυγΣΠΫޙ Switch Controller ECHO_REQUEST ECHO_REPLY
31. ϋϯυγΣΠΫޙ Switch Controller ECHO_REQUEST ECHO_REPLY ECHO_REPLY ECHO_REQUEST ఆظతʹ܁Γฦ͢
32. Controller.java (಺෦ΫϥεOFChannelHandler) protected void processOFMessage(OFMessage m) throws IOException, SwitchStateException { switch (m.getType()) { case HELLO: .... case ECHO_REQUEST: .... case FEATURES_REPLY: .... default: .... } ※ Tremaͩͱsrc/switch_manager/ofpmsg_recv.c: ofpmsg_recv()ΛݟΔͱ෼͔Δ
33. ະ஌ͷύέοτ͕౸ண Switch Controller
34. ະ஌ͷύέοτ͕౸ண Switch Controller ύέοτ౸ண
35. ະ஌ͷύέοτ͕౸ண Switch Controller ύέοτ౸ண PACKET_IN
36. ະ஌ͷύέοτ͕౸ண Switch Controller ύέοτ౸ண PACKET_IN ܦ࿏ܭࢉͳͲ PACKET_OUT or FLOW_MOD
37. Controller.java protected void handleMessage( IOFSwitch sw, OFMessage m, FloodlightContext bContext) { switch (m.getType()) { case PACKET_IN: .... default: .... } default಺ͰΠϕϯτϋϯυϥΛݺͼग़͢
38. • OpenFlow 1.1͕ެ։͞Ε͍ͯΔ࠷৽όʔδϣϯ • Ұํɺ΄΅શͯͷίϯτϩʔϥͷ࣮૷͸1.0४ڌ • Ver. 1.1͸ϋʔυ΢ΣΞ࣮૷͕೉͍͠ͱݴΘΕ͍ͯΔ • Ver. 1.1ʹ४ڌͨ͠εΠονͷ࣮૷͕ͳ͍ • Αͬͯɺίϯτϩʔϥͷ࣮૷΋ͳ͍ • ۙʑɺVer. 1.2͕ެ։͞ΕΔ༧ఆ • ίϯτϩʔϥ࣮૷͸Ͳ͏ͳΔ͔ʁ OpenFlowͷόʔδϣϯͱ࣮૷
39. ·ͱΊ • OpenFlowίϯτϩʔϥͷ঺հ • ίϯτϩʔϥؔ࿈ͷಈ޲ • OpenFlowίϯτϩʔϥͷ࣮૷ • FloodlightΛྫʹͯ͠
40. ࠷ޙʹ • ίϯτϩʔϥͱOpen vSwitchͷιʔείʔυϦʔσΟ ϯάڵຯ͋Δํ͍ͬͯ·͔͢ʁ
41. ͋Γ͕ͱ͏͍͟͝·ͨ͠