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A JOURNEY INTO A MICROSERVICE WORLD @mattheath

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Redis Load Balancer Java
 App Load Balancer MySQL Slave MySQL aws PHP
 API PHP
 API

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Redis Load Balancer Java
 App Load Balancer MySQL Slave MySQL aws PHP
 API PHP
 API

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Redis Load Balancer Java
 App Load Balancer MySQL Slave MySQL aws PHP
 API Services PHP
 API

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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

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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

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SLOW FAILOVER

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LACK OF
 AUTOMATION

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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

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UNCLEAR RESPONSIBILITIES

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SLOW
 DEVELOPMENT

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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

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A CLOUDY
 BEGINNING

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SCALE
 BREAKS HARDWARE

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SPEED
 BREAKS SOFTWARE

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“construct a highly agile and highly available service from ephemeral and assumed broken components” - Adrian Cockcroſt

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region 1 region n

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Cassandra region 1 region n Cassandra

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Cassandra region 1 Cassandra Go
 Service Java Service Java
 Service Java Service Go
 Service Go
 Service region n

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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

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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

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Logic Service Handler Storage

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Logic Storage Handler Library for building services that talk Protobuf via RMQ Service platform-layer

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Logic service-layer Storage Handler Library for building services that talk Protobuf via RMQ Self-configuring external service adapters Service platform-layer

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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

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Provisioning Service Provisioning Service Provisioning Service CI Pipeline (Janky/Jenkins) Amazon S3 Provisioning Manager / Scheduler

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Provisioning Service Provisioning Service Provisioning Service CI Pipeline (Janky/Jenkins) Amazon S3 Provisioning Manager / Scheduler

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Provisioning Service Rabbit MQ Discovery Service Provisioning Service New
 Service

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Provisioning Service Rabbit MQ Discovery Service Binding
 Service Provisioning Service New
 Service

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DEALING WITH COMPLEXITY

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TESTING

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LOAD FAILURE DEGRADATION

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15,000 JOBS/HOUR 50,000 DRIVERS 30,000+ REQ/S

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CONTINUOUS PRODUCTION TESTING

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MONITORING

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Provisioning Service Rabbit MQ Monitoring
 Service Provisioning Service 
 Service Publish Healthchecks

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DISTRIBUTED
 TRACING

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

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hailo~2~api api.v1.customer service.customer hailo~2~api api.v1.customer service.customer REQ REP REQ REP IN OUT IN OUT

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{ "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" }

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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

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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

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WHY BUILD MICROSERVICES?

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SIMPLE
 INDEPENDENT UNITS

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SIMPLE
 SCALABILITY

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EXPECT
 FAILURE

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AUTOMATE
 EVERYTHING

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CLOUD NATIVE
 ANTIFRAGILITY

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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