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Goを使ったセンサーデータ収集基盤の事例のお話 / golang.tokyo 26 LT
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Takeshi Shinoda
September 25, 2019
Programming
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960
Goを使ったセンサーデータ収集基盤の事例のお話 / golang.tokyo 26 LT
golang.tokyo #26 LT
https://golangtokyo.connpass.com/event/147175/
Takeshi Shinoda
September 25, 2019
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Transcript
GoΛͬͨ ηϯαʔσʔλऩूج൫ ͷ ࣄྫͷ͓ @takeshinoda
ࣗݾհ • ࣰా ݈ (͠ͷͩ ͚ͨ͠) • @takeshinoda • MODE,
Inc ۈ • ීஈRubyist • னGoͱTypeScriptॻ͍ͯ·͢ • Go݁ߏ͖
MODE, Inc. • γϦίϯόϨʔʹͯ2014ۀ • B2BͳIoTج൫Λఏڙ • ϦΞϧͷσʔλऩू • ϦΞϧσʔλͬͨϏδωεͷ͓ख͍
None
ϓϩμΫγϣϯͷ͓ख͍ MODE Ϋϥυ ࣌ܥྻ DB WebHook Πϕϯτج൫ OTA (Over-the-Air) ϩάऩू
σόΠεཧ ೝূ Users / Devices / API access MODE ήʔτΣΠ MODE αʔϏε ϏδωεɾۀαʔϏε ݱ࣮σʔλ ηϯαʔ/֤छػثσʔλ ͜͜ͷϨΠϠʔʹରͯ͠ PoCϨϕϧ͔Β ϓϩμΫγϣϯϨϕϧ·Ͱͷ ٕज़Λఏڙ͢Δ
MODE Ϋϥυ MODE ήʔτΣΠ MODE αʔϏε Ϣʔβʔɾఏܞاۀ ݱ࣮ੈք Sensor Cloud
Mobility Cloud Factory Cloud ࣌ܥྻ DB ࣌ܥྻ DB/SDS ࣌ܥྻ DB
MODE Gateway PLC Bluetooth MODbus GPS OBD-II ControllerPC RS-485 Bluetooth
LE MODbus/RTU NMEA 0183 CANbus / ISO9141-2 Smb protocol MODE Platform Application TSDB Event Dispatcher Manage Devices OTA Update Authentica tion Application MQTT REST API REST API
MODE Gateway PLC Bluetooth MODbus GPS OBD-II ControllerPC RS-485 Bluetooth
LE MODbus/RTU NMEA 0183 CANbus / ISO9141-2 Smb protocol MODE Platform Application TSDB Event Dispatcher Manage Devices OTA Update Authentica tion Application MQTT REST API REST API Go: Gateway, Server side TypeScript: Frontend, Gateway
Gateway OS: Ubuntu 16.04, 18.04, Yocto… Gateway main process Node
process WiFi / 3G OTA Updater Log collector
GoIoTͰศར Intel, ARM Ubuntu, Yocto Intel NUC, VIA, OpenBlocks, etc…
GoIoTͰศར • ࠷ॳظES6 • ΫϩείϯύΠϧͷखؒͷ • ඇಉظσʔλ௨৴ͷ੍ޚͷ؆ศ͞ • select, channel,
goroutine • σϓϩΠͷ؆ศ͞ • ͜ͷྖҬͷ؆ศ͞ͱͦͦ͜͜ศརͳܕ
Server side ඇಉظॲཧͱ ಉظॲཧ͕ࠞͬͯ͟Δ Gateway Eventॲཧ ࠶ૹॲཧ ࠶ଓॲཧ Event όοϑΝϦϯά
Command Synced data
GoIoTͰศར • ඇಉظ෦channelͱgoroutine • ಉظ෦௨ৗͷίʔυ • channelͱselect͕ͳ͍߹ɺͨ͘͞ΜͷΠϕ ϯτۦಈͰσʔλ͕ൃੜ͢ΔσʔλΛඇಉظ ॲཧͰॻ͘ͷ͕େม •
nodeEventEmitterͳͲͰద͍ͯͨ͠ • ֤छGWσϓϩΠͷ؆ศ͞ͱσόοάͷ؆ศ ͞ͰGo͕࠾༻͞Εͨ
Πϕϯτൃੜॲཧ TS for await (const sensorData of sensorModule.dataIterator()) { try
{ await timeout(dataSender.sendData(sensorData), timeout); } catch (error) { logger.error(`Failed: ${error}`); } } async* dataIterator(): AsyncIterable<SensorData[]> { while (true) { let sensorData: SensorData[]; try { sensorData = await this.next(); } catch (error) { throw error; // break loop } yield sensorData; } }
Πϕϯτൃੜॲཧ Go select { case l := <- serial.Rx: return
string(l), nil case <-time.After(timeout): return "", errors.New(“readtimeout”) } for { buf := make([]bytes, 1024) if _, err := s.Read(buf); err != nil { … } serial.Rx <- buf }
GoIoTͰศར • Ͳ͕ͬͪྑ͍͔͍͘͢͝͠ • ͲͬͪͳΜͱ͔ͳΔ • nodeGoඇಉظॲཧ༏ल • ݸਓతʹGoͷํ͕҆৺ •
TSతͳॻ͖ํʹ׳Εͯͳ͍ͷͪΖΜ͋Δ • ͔͠͠nodeͰΔͱ͖ʹTS҆͘͢͝৺
ͭ͠Μ
͋Γ͕ͱ͏ ͍͟͝·ͨ͠