A Journey into a Microservice World

Presented at Vilnius JUG #37

As Hailo expanded to a global presence, we needed to re-evaluate our approach to technology. This talk follows Hailo's journey from a monolithic application to a new microservice platform, running on three continents, built in both Java and Go.

1. A JOURNEY INTO A MICROSERVICE WORLD @mattheath
5. Redis Load Balancer Java
 App Load Balancer MySQL Slave MySQL aws PHP
 API PHP
 API
10. Redis Load Balancer Java
 App Load Balancer MySQL Slave MySQL aws PHP
 API PHP
 API
11. Redis Load Balancer Java
 App Load Balancer MySQL Slave MySQL aws PHP
 API Services PHP
 API
12. PHP
 API MySQL PHP Service Java Service LB per city per-region Load Balancer Cassandra PHP
 API PHP Service MySQL MySQL LB LB PHP
 API PHP
 API Java App Java App Java App
13. PHP
 API MySQL PHP Service Java Service LB per city per-region Load Balancer Cassandra PHP Service MySQL MySQL LB LB PHP
 API PHP
 API Java App Java App Java App PHP
 API
14. SLOW FAILOVER
15. LACK OF
 AUTOMATION
16. PHP
 API MySQL PHP Service Java Service LB per city per-region Load Balancer Cassandra PHP Service MySQL MySQL LB LB PHP
 API PHP
 API Java App Java App Java App PHP
 API
17. UNCLEAR RESPONSIBILITIES
18. SLOW
 DEVELOPMENT
19. Communication paths with two programmers Communication paths with three programmers Communication paths with four programmers Communication paths with five programmers Communication paths with ten programmers
20. A CLOUDY
 BEGINNING
21. SCALE
 BREAKS HARDWARE
22. SPEED
 BREAKS SOFTWARE
24. “construct a highly agile and highly available service from ephemeral and assumed broken components” - Adrian Cockcroſt
25. region 1 region n
26. Cassandra region 1 region n Cassandra
27. Cassandra region 1 Cassandra Go
 Service Java Service Java
 Service Java Service Go
 Service Go
 Service region n
28. Cassandra region 1 Cassandra Go
 Service Java Service Java
 Service Java Service RabbitMQ Message Bus
 (federated clusters per AZ) RabbitMQ Message Bus
 (federated clusters per AZ) Go
 Service Go
 Service region n
29. Cassandra Go
 Service Go
 Service Java Service Load Balancer API / Routing Layer region 1 Go
 Service Java
 Service Java Service Load Balancer API / Routing Layer RabbitMQ Message Bus
 (federated clusters per AZ) RabbitMQ Message Bus
 (federated clusters per AZ) Cassandra region n
30. Logic Service Handler Storage
31. Logic Storage Handler Library for building services that talk Protobuf via RMQ Service platform-layer
32. Logic service-layer Storage Handler Library for building services that talk Protobuf via RMQ Self-configuring external service adapters Service platform-layer
33. Logic service-layer Storage platform-layer Handler Library for building services that talk Protobuf via RMQ Self-configuring external service adapters Services get for free: • Provisioning • Service discovery • Configuration • Monitoring • Authentication/authorisation • AB testing • Self configuring connectivity 
 to third-party services Service
37. Provisioning Service Provisioning Service Provisioning Service CI Pipeline (Janky/Jenkins) Amazon S3 Provisioning Manager / Scheduler
38. Provisioning Service Provisioning Service Provisioning Service CI Pipeline (Janky/Jenkins) Amazon S3 Provisioning Manager / Scheduler
39. Provisioning Service Rabbit MQ Discovery Service Provisioning Service New
 Service
40. Provisioning Service Rabbit MQ Discovery Service Binding
 Service Provisioning Service New
 Service
41. DEALING WITH COMPLEXITY
42. TESTING
43. LOAD FAILURE DEGRADATION
44. 15,000 JOBS/HOUR 50,000 DRIVERS 30,000+ REQ/S
45. CONTINUOUS PRODUCTION TESTING
46. MONITORING
47. Provisioning Service Rabbit MQ Monitoring
 Service Provisioning Service 
 Service Publish Healthchecks
51. DISTRIBUTED
 TRACING
52. hailo~2~api api.v1.customer service.customer hailo~2~api api.v1.customer service.customer
53. hailo~2~api api.v1.customer service.customer hailo~2~api api.v1.customer service.customer REQ REP REQ REP IN OUT IN OUT
54. { "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" }
55. Phosphor Host Instances Publish Service A Trace Library worker chan UDP Service B Trace Library worker chan UDP Trace Service In-memory Aggregates Optional
 persistant storage Dashboards Monitoring
56. 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
62. WHY BUILD MICROSERVICES?
63. SIMPLE
 INDEPENDENT UNITS
64. SIMPLE
 SCALABILITY
65. EXPECT
 FAILURE
66. AUTOMATE
 EVERYTHING
67. CLOUD NATIVE
 ANTIFRAGILITY
68. AČIŪ! Image Credits
 HMS President: Roger Marks Orbital Ion Cannon: www.rom.ac Go Gophers: Renee French Duopia: Jonny Hughes Microchips: S4nt1 Control Room: NASA