You're Good to Go.

6 min read Original article ↗

Transcript

  3. FROM BARCELONA TO BOSTON, FROM TOKYO TO TORONTO.

  6. MySQL PHP Driver
 API Java
 Hailo Engine ELB MySQL PHP

    Driver
 API Java
 Hailo Engine ELB MySQL PHP Driver
 API Java
 Hailo Engine ELB eu-west-1 eu-west-1 us-east-1 PHP
 Cust
 API PHP
 Cust
 API PHP
 Cust
 API PHP
 Cust
 Service PHP
 Credits
 Service Java
 Pay Service ELB C* C* C* H1.5

  7. CHALLENGES

  11. Go
 Service Go
 Service Java Service ELB C* C* C*

    Go “Thin” API RabbitMQ Message Bus
 (federated clusters per AZ) us-east-1 eu-west-1 H2 Go
 Service Go
 Service Java Service ELB C* C* C* Go “Thin” API RabbitMQ Message Bus
 (federated clusters per AZ)

  14. H2

  19. SMALL INDEPENDENT SERVICES SINGLE RESPONSIBILITY EASE PAIN, SCALE RAPIDLY

  20. CLOUD NATIVE / ANTIFRAGILE EXPECT FAILURE AUTOMATE EVERYTHING

  23. RAZIEL

  25. RAZIEL

  26. INFRASTRUCTURE

  27. AUTOMATION GO SERVICES GOAMZ

  29. TESTING

  30. ! LOAD FAILURE DEGRADATION

  31. 15,000 JOBS/HOUR 20,000 DRIVERS 4,000+ REQ/S

  32. CONTINUOUS PRODUCTION TESTING

  33. TOOLING

  34. DISTRIBUTED
 TRACING

  35. hailo~2~api api.v1.customer service.customer hailo~2~api api.v1.customer service.customer

  37. { "timestamp": 1410262798427145176, "traceId": "d30479b8-1491-4390-7cf5-4cd14bc4b765", "type": "OUT", "messageId": "a661f9ef-774c-49b2-6e74-cfed65f7d120", "parentMessageId":

    "", "from": "com.hailocab.hshell", "to": "com.hailocab.service.nearest-driver.search", "hostname": "ip-10-13-2-251", "az": "eu-west-1a", "handlerInstanceId": “server-com.hailocab.service.nearest-driver-18bd089e-8ef1-4ca1-75cb-8...c”, "duration": 11222094 } { "timestamp": 1410262798416053450, "traceId": "d30479b8-1491-4390-7cf5-4cd14bc4b765", "type": "REQ", "messageId": "6404dd1e-c995-48a9-73dc-9edb1380f0bf", "parentMessageId": "a661f9ef-774c-49b2-6e74-cfed65f7d120", "from": "com.hailocab.service.nearest-driver", "to": "com.hailocab.service.zoning.search", "hostname": "ip-10-13-2-251", "az": "eu-west-1a" }

  39. // Req sends a request, and... func (c *Client) Req(req

    *Request, rsp proto.Message, options ...Options) errors.Error { ! go c.traceReq(req) responseMsg, err := c.doReq(req, options...) go c.traceRsp(req, responseMsg, err) if err != nil { return err } ! // Do other things... ! return nil }

  40. // instrumentedHandler wraps the handler to provide instrumentation func (ep

    *Endpoint) instrumentedHandler(req *Request) (proto.Message, errors.Error) { ! start := time.Now() var err errors.Error var msg proto.Message ! // Defer panic handling defer func() { stats.Record(ep, err, time.Since(start)) // oh crap i hope this never happens }() ! // Execute handler go traceIn(req) msg, err = ep.Handler(req) go traceOut(req, msg, err, time.Since(start)) return msg, err }

  41. // instrumentedHandler wraps the handler to provide instrumentation func (ep

    *Endpoint) instrumentedHandler(req *Request) (proto.Message, errors.Error) { ! start := time.Now() var err errors.Error var msg proto.Message ! // Defer panic handling defer func() { stats.Record(ep, err, time.Since(start)) // oh crap i hope this never happens }() ! // Execute handler go traceIn(req) // Don’t actually do this msg, err = ep.Handler(req) go traceOut(req, msg, err, time.Since(start)) return msg, err }

  44. var traceChan chan []byte ! func init() { // Use

    a buffered channel traceChan = make(chan []byte, 200) ! // Fire off a background worker for this channel defaultClient = NewClient(traceChan) go defaultClient.publisher() } ! // Send, drops trace if the backend is at capacity func Send(msg []byte) { select { case traceChan <- msg: // Success default: // Default case fired if channel is full // Ensures this is non blocking } }

  46. func (w *worker) loop() { var b []byte ! //

    Spin and forward on traces every time our // buffer fills, or when our time window elapses for { select { case b = <-w.ch: w.buf = append(w.buf, b) if len(w.buf) >= bufferSize { w.send() } case <-time.Tick(bufferWindow): w.send() } } }

  47. func (w *worker) loop() { var b []byte ! //

    Spin and forward on traces every time our // buffer fills, or when our time window elapses for { select { case b = <-w.ch: w.buf = append(w.buf, b) if len(w.buf) >= bufferSize { w.send() } case <-time.Tick(bufferWindow): // Leaks goroutines w.send() } } }

  48. func (w *worker) loop() { var b []byte timeout :=

    time.Tick(bufferWindow) ! // Spin and forward on traces every time our // buffer fills, or when our time window elapses for { select { case b = <-w.ch: w.buf = append(w.buf, b) if len(w.buf) >= bufferSize { w.send() } case <-timeout: w.send() } } }

  49. func (w *worker) loop() { var b []byte timeout :=

    time.NewTicker(bufferWindow) defer timeout.Stop() // Bonus points ! // Spin and forward on traces every time our // buffer fills, or when our time window elapses for { select { case b = <-w.ch: w.buf = append(w.buf, b) if len(w.buf) >= bufferSize { w.send() } case <-timeout.C: w.send() } } }

  50. Tracing: 33eda743-f124-435c-71fc-3c872bbc98e6 ! 2014-09-07 02:20:19.867 [/] [START] → - 2014-09-07

    02:20:19.867 [eu-west-1a/ip-10-11-3-51] [REQ] com.hailocab.hailo-2-api → com.hailocab.api.v1.customer.neardrivers - 2014-09-07 02:20:19.867 [eu-west-1a/ip-10-11-2-203] [IN] com.hailocab.hailo-2-api → com.hailocab.api.v1.customer.neardrivers - 2014-09-07 02:20:19.868 [eu-west-1a/ip-10-11-2-203] [REQ] com.hailocab.api.v1.customer → com.hailocab.service.feature-flags.features - 2014-09-07 02:20:19.869 [eu-west-1a/ip-10-11-3-111] [IN] com.hailocab.api.v1.customer → com.hailocab.service.feature-flags.features - 2014-09-07 02:20:19.876 [eu-west-1a/ip-10-11-3-111] [REQ] com.hailocab.service.feature-flags → com.hailocab.service.hob.list - 2014-09-07 02:20:19.877 [eu-west-1a/ip-10-11-3-168] [IN] com.hailocab.service.hob → com.hailocab.service.config.compile - 2014-09-07 02:20:19.877 [eu-west-1a/ip-10-11-3-111] [IN] com.hailocab.service.feature-flags → com.hailocab.service.hob.list - 2014-09-07 02:20:19.877 [eu-west-1a/ip-10-11-3-111] [REQ] com.hailocab.service.hob → com.hailocab.service.config.compile - 2014-09-07 02:20:19.883 [eu-west-1a/ip-10-11-3-168] [OUT] com.hailocab.service.hob → com.hailocab.service.config.compile - 5.59 ms 2014-09-07 02:20:19.886 [eu-west-1a/ip-10-11-3-111] [REP] com.hailocab.service.hob → com.hailocab.service.config.compile - 8.40 ms 2014-09-07 02:20:19.887 [eu-west-1a/ip-10-11-3-111] [OUT] com.hailocab.service.feature-flags → com.hailocab.service.hob.list - 9.72 ms 2014-09-07 02:20:19.889 [eu-west-1a/ip-10-11-3-111] [REP] com.hailocab.service.feature-flags → com.hailocab.service.hob.list - 13.23 ms 2014-09-07 02:20:19.889 [eu-west-1a/ip-10-11-3-111] [OUT] com.hailocab.api.v1.customer → com.hailocab.service.feature-flags.features - 20.58 ms 2014-09-07 02:20:19.890 [eu-west-1a/ip-10-11-2-203] [REP] com.hailocab.api.v1.customer → com.hailocab.service.feature-flags.features - 22.59 ms 2014-09-07 02:20:19.902 [eu-west-1a/ip-10-11-2-203] [REQ] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 2014-09-07 02:20:19.903 [eu-west-1a/ip-10-11-2-203] [REQ] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 2014-09-07 02:20:19.903 [eu-west-1a/ip-10-11-2-203] [REQ] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 2014-09-07 02:20:19.904 [eu-west-1a/ip-10-11-3-111] [IN] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 2014-09-07 02:20:19.904 [eu-west-1a/ip-10-11-3-111] [OUT] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 0.36 ms 2014-09-07 02:20:19.905 [eu-west-1a/ip-10-11-2-203] [REP] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 1.97 ms 2014-09-07 02:20:19.905 [eu-west-1a/ip-10-11-2-214] [IN] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 2014-09-07 02:20:19.905 [eu-west-1a/ip-10-11-2-203] [REQ] com.hailocab.api.v1.customer → com.hailocab.service.nearest-driver.search - 2014-09-07 02:20:19.905 [eu-west-1a/ip-10-11-2-214] [OUT] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 0.10 ms
 ERR - com.hailocab.service.fare.basefare: Missing config at xxx 2014-09-07 02:20:19.906 [eu-west-1a/ip-10-11-2-214] [IN] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 2014-09-07 02:20:19.906 [eu-west-1a/ip-10-11-2-214] [OUT] com.hailocab.api.v1.customer → com.hailocab.service.fare.basefare - 0.06 ms 
 ERR - com.hailocab.service.fare.basefare: Missing config at xxx 2014-09-07 02:20:19.907 [eu-west-1a/ip-10-11-3-58] [IN] com.hailocab.api.v1.customer → com.hailocab.service.nearest-driver.search - 2014-09-07 02:20:19.907 [eu-west-1a/ip-10-11-3-58] [REQ] com.hailocab.service.nearest-driver → com.hailocab.service.zoning.search - 2014-09-07 02:20:19.908 [eu-west-1a/ip-10-11-3-58] [IN] com.hailocab.service.nearest-driver → com.hailocab.service.zoning.search - 2014-09-07 02:20:19.908 [eu-west-1a/ip-10-11-3-58] [OUT] com.hailocab.service.nearest-driver → com.hailocab.service.zoning.search - 0.20 ms 2014-09-07 02:20:19.909 [eu-west-1a/ip-10-11-3-58] [REP] com.hailocab.service.nearest-driver → com.hailocab.service.zoning.search - 2.25 ms 2014-09-07 02:20:19.909 [eu-west-1a/ip-10-11-3-58] [REQ] com.hailocab.service.nearest-driver → com.hailocab.service.raziel.multisearch - 2014-09-07 02:20:19.912 [eu-west-1a/ip-10-11-3-227] [IN] com.hailocab.service.nearest-driver → com.hailocab.service.raziel.multisearch - 2014-09-07 02:20:19.919 [eu-west-1a/ip-10-11-3-58] [REP] com.hailocab.service.nearest-driver → com.hailocab.service.raziel.multisearch - 9.46 ms 2014-09-07 02:20:19.919 [eu-west-1a/ip-10-11-3-58] [REQ] com.hailocab.service.nearest-driver → com.hailocab.service.eta.multitraveltime - 2014-09-07 02:20:19.919 [eu-west-1a/ip-10-11-3-227] [OUT] com.hailocab.service.nearest-driver → com.hailocab.service.raziel.multisearch - 7.58 ms 2014-09-07 02:20:19.920 [eu-west-1a/ip-10-11-3-58] [IN] com.hailocab.service.nearest-driver → com.hailocab.service.eta.multitraveltime - 2014-09-07 02:20:19.920 [eu-west-1a/ip-10-11-3-58] [OUT] com.hailocab.service.nearest-driver → com.hailocab.service.eta.multitraveltime - 0.06 ms 2014-09-07 02:20:19.921 [eu-west-1a/ip-10-11-3-58] [REP] com.hailocab.service.nearest-driver → com.hailocab.service.eta.multitraveltime - 1.77 ms 2014-09-07 02:20:19.921 [eu-west-1a/ip-10-11-3-58] [OUT] com.hailocab.api.v1.customer → com.hailocab.service.nearest-driver.search - 14.02 ms 2014-09-07 02:20:19.921 [eu-west-1a/ip-10-11-2-203] [REP] com.hailocab.api.v1.customer → com.hailocab.service.nearest-driver.search - 15.48 ms 2014-09-07 02:20:19.941 [eu-west-1a/ip-10-11-2-203] [REQ] com.hailocab.api.v1.customer → com.hailocab.service.experiment.readlastupdated - 2014-09-07 02:20:19.945 [eu-west-1a/ip-10-11-2-214] [IN] com.hailocab.api.v1.customer → com.hailocab.service.experiment.readlastupdated - 2014-09-07 02:20:19.947 [eu-west-1a/ip-10-11-2-214] [OUT] com.hailocab.api.v1.customer → com.hailocab.service.experiment.readlastupdated - 1.82 ms 2014-09-07 02:20:19.947 [eu-west-1a/ip-10-11-2-203] [REP] com.hailocab.api.v1.customer → com.hailocab.service.experiment.readlastupdated - 6.01 ms 2014-09-07 02:20:19.948 [eu-west-1a/ip-10-11-2-203] [OUT] com.hailocab.hailo-2-api → com.hailocab.api.v1.customer.neardrivers - 80.46 ms 2014-09-07 02:20:19.950 [eu-west-1a/ip-10-11-3-51] [REP] com.hailocab.hailo-2-api → com.hailocab.api.v1.customer.neardrivers - 82.71 ms

  55. SO, GO?

  56. SMALL, SIMPLE EASY TO READ & LEARN CONCURRENCY DEPLOYMENT

  57. STILL LEARNING 3RD PARTY LIBRARY SUPPORT PACKAGE MANAGEMENT

  58. NEXT?

  59. TOOLING, TESTING, AUTOMATION, SCHEDULING, DOCKER, KUBERNETES

  61. THANKS! PS. We’re hiring! Go London User Group, Sep 2014