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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1. GoΛ࢖ͬͨ ηϯαʔσʔλऩूج൫ ͷ ࣄྫͷ͓࿩ @takeshinoda

2. ࣗݾ঺հ • ࣰా ݈ (͠ͷͩ ͚ͨ͠) • @takeshinoda • MODE,

   Inc ۈ຿ • ීஈ͸Rubyist • ன͸GoͱTypeScriptॻ͍ͯ·͢ • Go΋݁ߏ޷͖

3. MODE, Inc. • γϦίϯόϨʔʹͯ2014೥૑ۀ • B2BͳIoTج൫Λఏڙ • ϦΞϧͷσʔλऩू • ϦΞϧσʔλ࢖ͬͨϏδωεͷ͓ख఻͍

4. None

5. ϓϩμΫγϣϯ΁ͷ͓ख఻͍ MODE Ϋϥ΢υ ࣌ܥྻ DB WebHook Πϕϯτج൫ OTA (Over-the-Air) ϩάऩू

   σόΠε؅ཧ ೝূ Users / Devices / API access MODE ήʔτ΢ΣΠ MODE αʔϏε Ϗδωεɾۀ຿αʔϏε ݱ࣮σʔλ ηϯαʔ/֤छػثσʔλ ͜͜ͷϨΠϠʔʹରͯ͠ PoCϨϕϧ͔Β ϓϩμΫγϣϯϨϕϧ·Ͱͷ ٕज़Λఏڙ͢Δ

6. MODE Ϋϥ΢υ MODE ήʔτ΢ΣΠ MODE αʔϏε Ϣʔβʔɾఏܞاۀ ݱ࣮ੈք Sensor Cloud

   Mobility Cloud Factory Cloud ࣌ܥྻ DB ࣌ܥྻ DB/SDS ࣌ܥྻ DB

7. 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

8. 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

9. Gateway OS: Ubuntu 16.04, 18.04, Yocto… Gateway main process Node

   process WiFi / 3G OTA Updater Log collector

10. Go͸IoTͰศར Intel, ARM Ubuntu, Yocto Intel NUC, VIA, OpenBlocks, etc…

11. Go͸IoTͰศར • ࠷ॳظ͸ES6 • ΫϩείϯύΠϧͷखؒͷ໰୊ • ඇಉظσʔλ௨৴ͷ੍ޚͷ؆ศ͞ • select, channel,

    goroutine • σϓϩΠͷ؆ศ͞ • ͜ͷྖҬͷ؆ศ͞ͱͦͦ͜͜ศརͳܕ

12. Server side ඇಉظॲཧͱ ಉظॲཧ͕ࠞͬͯ͟Δ Gateway Eventॲཧ ࠶ૹॲཧ ࠶઀ଓॲཧ Event όοϑΝϦϯά

    Command Synced data

13. Go͸IoTͰศར • ඇಉظ෦෼͸channelͱgoroutine • ಉظ෦෼͸௨ৗͷίʔυ • channelͱselect͕ͳ͍৔߹ɺͨ͘͞ΜͷΠϕ ϯτۦಈͰσʔλ͕ൃੜ͢ΔσʔλΛඇಉظ ॲཧͰॻ͘ͷ͕େม •

    node΋EventEmitterͳͲͰదͯ͠͸͍ͨ • ֤छGWσϓϩΠͷ؆ศ͞ͱσόοάͷ؆ศ ͞ͰGo͕࠾༻͞Εͨ

14. 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; } }

15. 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 }

16. Go͸IoTͰศར • Ͳ͕ͬͪྑ͍͔͸͘͢͝೉͍͠ • Ͳͬͪ΋ͳΜͱ͔ͳΔ • node΋Go΋ඇಉظॲཧ͸༏ल • ݸਓతʹ͸Goͷํ͕҆৺ •

    TSతͳॻ͖ํʹ׳Εͯͳ͍ͷ΋΋ͪΖΜ͋Δ • ͔͠͠nodeͰ΍Δͱ͖ʹ͸TS͸҆͘͢͝৺

17. ͭ͠΋Μ

18. ͋Γ͕ͱ͏ ͍͟͝·ͨ͠