MicroServicesApp

Overview

• Installing Tools
• Ports
• Special steps
  • Updates to Step 39
  • Updates to Step 40

Versions

• 2.2.0 M1.RELEASE
• Finchley.M8

URLs

Application	URL
Limits Service	http://localhost:8080/limits
Spring Cloud Config Server	http://localhost:8888/limits-service/default http://localhost:8888/limits-service/dev
Currency Converter Service - Direct Call	http://localhost:8100/currency-converter/from/USD/to/INR//usr/local/var/log/rabbitmq/rabbit@localhost.log/usr/local/var/log/rabbitmq/rabbit@localhost.logquantity/10
Currency Converter Service - Feign	http://localhost:8100/currency-converter-feign/from/EUR/to/INR/quantity/10000
Currency Exchange Service	http://localhost:8000/currency-exchange/from/EUR/to/INR http://localhost:8001/currency-exchange/from/USD/to/INR
Eureka	http://localhost:8761/
Zuul - Currency Exchange & Exchange Services	http://localhost:8765/currency-exchange-service/currency-exchange/from/EUR/to/INR http://localhost:8765/currency-conversion-service/currency-converter-feign/from/USD/to/INR/quantity/10

VM Argument

-Dserver.port=8001

Commands

• mkdir git-configuration-repo
• cd git-configuration-repo/
• git init
• git add -A
• git commit -m "first commit"

Ports

Application	Port
Limits Service	8080, 8081, ...
Spring Cloud Config Server	8888
Currency Exchange Service	8000, 8001, 8002, ..
Currency Conversion Service	8100, 8101, 8102, ...
Netflix Eureka Naming Server	8761
Netflix Zuul API Gateway Server	8765
Zipkin Distributed Tracing Server	9411

Installing Tools

• Eclipse & Embedded Maven
• PostMan
• Git Client - https://git-scm.com/
• Rabbit MQ - https://www.rabbitmq.com/download.html

Installing Eclipse & Embedded Maven

• Installation Video : https://www.youtube.com/playlist?list=PLBBog2r6uMCSmMVTW_QmDLyASBvovyAO3
• GIT Repository For Installation : https://github.com/in28minutes/getting-started-in-5-steps
• PDF : https://github.com/in28minutes/SpringIn28Minutes/blob/master/InstallationGuide-JavaEclipseAndMaven_v2.pdf

Installing Rabbit MQ

Windows

• https://www.rabbitmq.com/install-windows.html
• https://www.rabbitmq.com/which-erlang.html
• http://www.erlang.org/downloads
• Video - https://www.youtube.com/watch?v=gKzKUmtOwR4

Mac

• https://www.rabbitmq.com/install-homebrew.html

Special steps

Updates to Step 39

- Running Zipkin on Windows

• In the next step, we set up our Zipkin Server by downloading a jar.
• Move to the next step if you are not on Windows!

ONLY FOR WINDOWS USERS

If you are on Windows, this is important for you:

After you watch the next video, You can use the below commands to run Zipkin Server.

  - set RABBIT_URI=amqp://localhost
  - java -jar zipkin-server-2.7.0-exec.jar

Updates to Step 40

- Use spring-cloud-starter-zipkin and spring-rabbit

The dependencies are ever changing with Spring Cloud and Spring Boot.

If you are using Spring Boot Release >= 2.1.*, you would need to use spring-cloud-starter-zipkin and spring-rabbit instead of spring-cloud-sleuth-zipkin and spring-cloud-starter-bus-amqp.

You would need to make this change in THREE pom.xmls - in currency-conversion-service, currency-exchange-service and zuul-api-gateway projects

New Dependencies

	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-zipkin</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.amqp</groupId>
		<artifactId>spring-rabbit</artifactId>
	</dependency>

OLD Dependencies to be Replaced

	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-sleuth-zipkin</artifactId>
	</dependency>

	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-bus-amqp</artifactId>
	</dependency>

Diagrams

• http://viz-js.com/
• http://dreampuf.github.io/GraphvizOnline/

MicroserviceCommunication
~~~~~~~~~~~~~~~~~~~~~~~~~
digraph architecture {
  rankdir=TB;
{rank=same; MovieService, CustomerService, ReviewService, BookingService, FareCalculationService};
DB1,DB2,DB3,DB4,DB5[shape=cylinder]
MovieService, CustomerService, ReviewService, BookingService, FareCalculationService[shape=component]

  MovieService->DB1;
  CustomerService->DB2;
ReviewService->DB3;
BookingService ->DB4;
FareCalculationService ->DB5;


}

digraph architecture {
  rankdir=TB;
{rank=same; MovieApplication};
LARGEDB[shape=cylinder];
  MovieApplication->LARGEDB;

}

digraph architecture {
  rankdir=TB;
{rank=same; CurrencyCalculationService, CurrencyExchangeService, LimitsService};
Configuration[shape=cylinder]
Database[shape=cylinder]
LimitsService, CurrencyCalculationService, CurrencyExchangeService[shape=component]

  CurrencyCalculationService -> CurrencyExchangeService -> LimitsService;

  CurrencyExchangeService->Database;
  LimitsService->Configuration;

}

Microservices-Environments
~~~~~~~~~~~~~~~~~~~~~~~~~~~`
digraph architecture {
  rankdir=LR;

node[shape=record]
LimitsService, CurrencyCalculationService, CurrencyExchangeService[shape=component]

  CurrencyCalculationService -> CurrencyExchangeService -> LimitsService

  subgraph CurrencyCalculationService {
      {rank=same; CurrencyCalculationService,CCDEV,CCQA,CCSTAGE, CCPROD};
  }

  subgraph CurrencyExchangeService {
      CurrencyExchangeService;
      {rank=same; CurrencyExchangeService,CEDEV,CEQA, CESTAGE, CEPROD};
  }

  subgraph LimitsService {
      CurrencyExchangeService;
      {rank=same; LimitsService,LSDEV,LSQA, LSSTAGE, LSPROD};
  }

}


SpringCloudConfigServer
#######################
digraph architecture {
rankdir = TB;
node[shape=component]
Git[shape=cylinder]
{rank=same; CurrencyCalculationService, CurrencyExchangeService, LimitsService};
CurrencyExchangeService -> SpringCloudConfigServer;
CurrencyCalculationService -> SpringCloudConfigServer;
LimitsService -> SpringCloudConfigServer
SpringCloudConfigServer -> Git

}

EUREKANAMINGSERVER
#######################
digraph architecture {
rankdir = TB;
node[shape=component]
{rank=same; CurrencyCalculationService, CurrencyExchangeService, LimitsService};
CurrencyExchangeService -> EurekaNamingServer;
CurrencyCalculationService -> EurekaNamingServer;
LimitsService -> EurekaNamingServer
}

RibbonClientSideLoadBalancing
#######################
digraph architecture {
rankdir = TB;
node[shape=component]
Ribbon[shape=underline]

{rank=same; CurrencyExchangeService1, CurrencyExchangeService2, CurrencyExchangeService3};
{rank=same; Ribbon, NamingServer };
Ribbon -> CurrencyExchangeService1
Ribbon -> CurrencyExchangeService2
Ribbon -> CurrencyExchangeService3
CurrencyCalculationService -> Ribbon
Ribbon -> NamingServer

}

ZipkinDistributedTracingServer
###############################
digraph architecture {
rankdir = TB;
node[shape=component]
Database[shape=cylinder]
RabbitMQ[shape=underline]
{rank=same; CurrencyCalculationService, CurrencyExchangeService, LimitsService};
CurrencyExchangeService -> RabbitMQ
CurrencyCalculationService -> RabbitMQ;
LimitsService -> RabbitMQ
RabbitMQ -> ZipkinDistributedTracingServer
ZipkinDistributedTracingServer -> Database

}

CurrencyExchangeMicroserviceDeployment
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~``
digraph architecture {
rankdir = TB;
node[shape=record]
{rank=same; DEV, QA, STAGE, PROD};

DEV -> DEV1

QA -> QA1
QA -> QA2

STAGE -> STAGE1

PROD -> PROD1
PROD -> PROD2
PROD -> PROD3
PROD -> PROD4

}

CurrencyConversionMicroserviceDeployment
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~``
digraph architecture {
rankdir = TB;
node[shape=record]
{rank=same; DEV, QA, STAGE, PROD};

DEV -> DEV1

QA -> QA1
QA -> QA2

STAGE -> STAGE1

PROD -> PROD1

}