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spring-microservices-v3's Introduction

Spring Microservices - REST + Microservices + Spring Boot + Spring Cloud + Docker + Kubernetes

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Learn how to create awesome Microservices and RESTful web services with Spring and Spring Boot.

Course Updates

  • Jan 2021: Docker and Kubernetes added to the course!
  • Aug 2022: REST API V2 recorded with Spring Boot 3
  • Feb 2023: Microservices V2 upgraded to Spring Boot 3

Launch MySQL as Docker Container

docker run --detach --env MYSQL_ROOT_PASSWORD=dummypassword --env MYSQL_USER=social-media-user --env MYSQL_PASSWORD=dummypassword --env MYSQL_DATABASE=social-media-database --name mysql --publish 3306:3306 mysql:8-oracle

Installing Tools

Our Recommendations

  • Use latest version of Java
  • Use latest version of "Eclipse IDE for Enterprise Java Developers" or Intellij Community Edition
  • Remember: Spring Boot 3+ works only with Java 17+

Installing Java

Troubleshooting

Installing Eclipse

Troubleshooting

What will you learn?

  • Docker
  • Kubernetes
  • Spring Boot 2.4.x+ & Spring Cloud 2020.x+
    • Service Registry using Eureka Naming Server
    • Load Balancing with Spring Cloud LoadBalancer (replacing Ribbon)
    • API Gateway with Spring Cloud Gateway (instead of Zuul)
    • Circuit Breaker with Resilience4j (instead of Hystrix)
    • Distributed Tracing with Zipkin
    • Asynchronous Communication using Rabbit MQ

Microservices with Spring Cloud - V2

  • Step 01 - Setting up Limits Microservice
  • Step 02 - Creating a hard coded limits service
  • Step 03 - Enhance limits service to pick up configuration from application properties
  • Step 04 - Setting up Spring Cloud Config Server
  • Step 05 - Installing Git and Creating Local Git Repository
  • Step 06 - Connect Spring Cloud Config Server to Local Git Repository
  • Step 07 - Connect Limits Service to Spring Cloud Config Server
  • Step 08 - Configuring Profiles for Limits Service
  • Step 09 - Introduction to Currency Conversion and Currency Exchange Microservices
  • Step 10 - Setting up Currency Exchange Microservice
  • Step 11 - Create a simple hard coded currency exchange service
  • Step 12 - Setting up Dynamic Port in the Response
  • Step 13 - Configure JPA and Initialized Data
  • Step 14 - Create a JPA Repository
  • Step 15 - Setting up Currency Conversion Microservice
  • Step 16 - Creating a service for currency conversion
  • Step 17 - Invoking Currency Exchange Microservice from Currency Conversion Microservice
  • Step 18 - Using Feign REST Client for Service Invocation
  • Step 19 - Understand Naming Server and Setting up Eureka Naming Server
  • Step 20 - Connect Currency Conversion Microservice & Currency Exchange Microservice to Eureka
  • Step 21 - Load Balancing with Eureka, Feign & Spring Cloud LoadBalancer
  • Step 22 - Setting up Spring Cloud API Gateway
  • Step 23 - Enabling Discovery Locator with Eureka for Spring Cloud Gateway
  • Step 24 - Exploring Routes with Spring Cloud Gateway
  • Step 25 - Implementing Spring Cloud Gateway Logging Filter
  • Step 26 - Getting started with Circuit Breaker - Resilience4j
  • Step 27 - Playing with Resilience4j - Retry and Fallback Methods
  • Step 28 - Playing with Circuit Breaker Features of Resilience4j
  • Step 29 - Exploring Rate Limiting and BulkHead Features of Resilience4j

Docker with Microservices using Spring Boot and Spring Cloud - V2

  • Step 00 - Match made in Heaven - Docker and Microservices
  • Step 01 - Installing Docker - Docker
  • Step 02 - Your First Docker Use case - Deploy a Spring Boot Application
  • Step 03 - Important Docker Concepts - Registry, Repository, Tag, Image and Container
  • Step 04 - Playing with Docker Images and Containers
  • Step 05 - Understanding Docker Architecture - Docker Client, Docker Engine
  • Step 06 - Why is Docker Popular
  • Step 07 - Playing with Docker Images
  • Step 08 - Playing with Docker Containers
  • Step 09 - Playing with Docker Commands - stats, system
  • Step 10 - Introduction to Distributed Tracing
  • Step 11 - Launching Zipkin Container using Docker
  • Step 12 - Connecting Currency Exchange Microservice with Zipkin
  • Step 13 - Connecting Currency Conversion Microservice and API Gateway with Zipkin
  • Step 14 - Getting Setup with Microservices for Creating Container Images
  • Step 15 - Creating Container Image for Currency Exchange Microservice
  • Step 16 - Getting Started with Docker Compose - Currency Exchange Microservice
  • Step 17 - Running Eureka Naming Server with Docker Compose
  • Step 18 - Running Currency Conversion Microservice with Docker Compose
  • Step 19 - Running Spring Cloud API Gateway with Docker Compose
  • Step 20 - Running Zipkin with Docker Compose

Kubernetes with Microservices using Docker, Spring Boot and Spring Cloud - V2

  • Step 00 - Docker, Kubernetes and Microservices - Made for each other
  • Step 01 - Getting Started with Docker, Kubernetes and Google Kubernetes Engine
  • Step 02 - Creating Google Cloud Account
  • Step 03 - Creating Kubernetes Cluster with Google Kubernetes Engine (GKE)
  • Step 04 - Review Kubernetes Cluster and Learn Few Fun Facts about Kubernetes
  • Step 05 - Deploy Your First Spring Boot Application to Kubernetes Cluster
  • Step 06 - Quick Look at Kubernetes Concepts - Pods, Replica Sets and Deployment
  • Step 07 - Understanding Pods in Kubernetes
  • Step 08 - Understanding ReplicaSets in Kubernetes
  • Step 09 - Understanding Deployment in Kubernetes
  • Step 10 - Quick Review of Kubernetes Concepts - Pods, Replica Sets and Deployment
  • Step 11 - Understanding Services in Kubernetes
  • Step 12 - Quick Review of GKE on Google Cloud Console
  • Step 13 - Understanding Kubernetes Architecture - Master Node and Nodes
  • Step 14 - Setup Currency Exchange & Currency Conversion Microservices - K8S versions
  • Step 15 - Create Container images for Currency Exchange & Currency Conversion Microservices
  • Step 16 - Deploy Microservices to Kubernetes & Understand Service Discovery
  • Step 17 - Creating Declarative Configuration Kubernetes YAML for Microservices
  • Step 18 - Clean up Kubernetes YAML for Microservices
  • Step 19 - Enable Logging and Tracing APIs in Google Cloud Platform
  • Step 20 - Deploying Microservices using Kubernetes YAML Configuration
  • Step 21 - Playing with Kubernetes Declarative YAML Configuration
  • Step 22 - Creating Environment Variables to enable Microservice Communication
  • Step 23 - Understanding Centralized Configuration in Kubernetes - Config Maps
  • Step 24 - Exploring Centralized Logging and Monitoring in GKE
  • Step 25 - Exploring Microservices Deployments with Kubernetes
  • Step 26 - Configuring Liveliness and Readiness Probes for Microservices with K8S
  • Step 27 - Autoscaling Microservices with Kubernetes
  • Step 28 - Delete Kubernetes Cluster and Thank You!

URLS

Diagrams

digraph architecture {
  rankdir=LR;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"]
node[style=filled,color="#59C8DE"];

Microservice1 -> Microservice2 -> Microservice3 -> Microservice4 -> Microservice5


}

digraph architecture {
  rankdir=TB;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"]
node[style=filled,color="#59C8DE"];

Microservice1 -> Microservice2 -> Microservice3

{rank=same; Microservice1, A1, A2};
{rank=same; Microservice2, B1, B2, B3, B4};
{rank=same; Microservice3, C1};

}

digraph architecture {
  rankdir=TB;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"]
{rank=same; MovieService, CustomerService, ReviewService, BookingService, FareCalculationService};
node[style=filled,color="#59C8DE"];
DB1,DB2,DB3,DB4,DB5[shape=cylinder]

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


}

digraph architecture {
  rankdir=TB;
rankdir=TB;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"]
{rank=same; MovieApplication};
LARGEDB[shape=cylinder];
  MovieApplication->LARGEDB;

}

digraph architecture {
rankdir = TB;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"]
//node [style=filled,color="#D14D28"]
Git[shape=cylinder]
{rank=same; LimitsService,MicroserviceX,MicroserviceY};
LimitsService -> SpringCloudConfigServer
MicroserviceX -> SpringCloudConfigServer
MicroserviceY -> SpringCloudConfigServer
SpringCloudConfigServer -> Git
LimitsService[label=<Limits Microservice>]
MicroserviceX[label=<Microservice X>]
MicroserviceY[label=<Microservice Y>]
SpringCloudConfigServer[label=<Spring Cloud Config Server>]
Git[label=<Git Repo>]

}


digraph architecture {
rankdir = TB;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"];
//node [style=filled,color="#D14D28"]
  CurrencyCalculationService -> CurrencyExchangeService;
  
  CurrencyExchangeService->Database;
Database[shape=cylinder]
CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService[label=<Currency Exchange Microservice>];
CurrencyCalculationService, CurrencyExchangeService[shape=recordfs]
{rank=same; CurrencyCalculationService, CurrencyExchangeService};
  CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService[label=<Currency Exchange Microservice>];

}


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

node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"];


  CurrencyCalculationService -> CurrencyExchangeService -> MicroserviceX

  subgraph CurrencyCalculationService {
      {rank=same; CurrencyCalculationService,CCDEV,CCQA,CCSTAGE, CCPROD};
  }
 
  subgraph CurrencyExchangeService {
      CurrencyExchangeService;
      {rank=same; CurrencyExchangeService,CEDEV,CEQA, CESTAGE, CEPROD};
  }
  
  subgraph MicroserviceX {
      CurrencyExchangeService;
      {rank=same; MicroserviceX,LSDEV,LSQA, LSSTAGE, LSPROD};
  }
 
  CCDEV,CEDEV,LSDEV[label=<DEV>,width=1]
  CCQA,CEQA,LSQA[label=<QA>,width=1]
  CCSTAGE,CESTAGE,LSSTAGE[label=<STAGE>,width=1]
  CCPROD,CEPROD,LSPROD[label=<PROD>,width=1]
  CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService[label=<Currency Exchange Microservice>];
MicroserviceX[label=<Microservice X>]

}

NAMINGSERVER
#######################
digraph architecture {
rankdir = TB;
node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"];

{rank=same; CurrencyCalculationService, CurrencyExchangeService};
CurrencyExchangeService -> NamingServer;
CurrencyCalculationService -> NamingServer;
MicroserviceX -> NamingServer
  CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService[label=<Currency Exchange Microservice>];
MicroserviceX[label=<Microservice X>]
NamingServer[label=<Naming Server or Service Registry>]
}

ClientSideLoadBalancing
#######################
digraph architecture {
rankdir = TB;
node[shape=component]
node[shape="rect"]
node[style=filled,color="#59C8DE"];

{rank=same; CurrencyExchangeService1, CurrencyExchangeService2, CurrencyExchangeService3};
{rank=same; LoadBalancer, NamingServer };
LoadBalancer -> CurrencyExchangeService1
LoadBalancer -> CurrencyExchangeService2
LoadBalancer -> CurrencyExchangeService3
CurrencyCalculationService -> LoadBalancer
LoadBalancer -> NamingServer
CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService1[label=<Currency Exchange - Instance 1>];
CurrencyExchangeService2[label=<Currency Exchange - Instance 2>];
CurrencyExchangeService3[label=<Currency Exchange - Instance 3>];
LoadBalancer[label=<Load Balancer>]
NamingServer[label=<Naming Server>]
}

ZipkinDistributedTracingServer
###############################
digraph architecture {
rankdir = TB;
node[shape=component]
node[shape="rect"]
node[style=filled,color="#59C8DE"];

Database[shape=cylinder]
{rank=same; APIGateway, CurrencyCalculationService, CurrencyExchangeService};
APIGateway -> CurrencyCalculationService -> CurrencyExchangeService
CurrencyExchangeService -> ZipkinDistributedTracingServer
CurrencyCalculationService -> ZipkinDistributedTracingServer;
APIGateway -> ZipkinDistributedTracingServer
ZipkinDistributedTracingServer -> Database

CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService[label=<Currency Exchange Microservice>];
APIGateway[label=<API Gateway>];
ZipkinDistributedTracingServer[label=<Distributed Tracing Server>];
}


digraph architecture {
rankdir = TB;
node[shape=component]
node[shape="rect"]
node[style=filled,color="#59C8DE"];

Database[shape=cylinder]
RabbitMQ[shape=underline,style=unfilled,color="#000000"]
{rank=same; APIGateway, CurrencyCalculationService, CurrencyExchangeService};
APIGateway -> CurrencyCalculationService -> CurrencyExchangeService
CurrencyExchangeService -> RabbitMQ
CurrencyCalculationService -> RabbitMQ;
APIGateway -> RabbitMQ
RabbitMQ -> ZipkinDistributedTracingServer
ZipkinDistributedTracingServer -> Database

  CurrencyCalculationService[label=<Currency Conversion Microservice>];
CurrencyExchangeService[label=<Currency Exchange Microservice>];
APIGateway[label=<API Gateway>];
RabbitMQ[label=<Rabbit MQ>];
ZipkinDistributedTracingServer[label=<Distributed Tracing Server>];
}

CurrencyExchangeMicroserviceDeployment
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~``
digraph architecture {
rankdir = TB;

node[shape=component]
node[shape=record]
node[style=filled,color="#59C8DE"];

{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=component]
node[shape=record]
node[style=filled,color="#59C8DE"];

{rank=same; DEV, QA, STAGE, PROD};

DEV -> DEV1

QA -> QA1
QA -> QA2

STAGE -> STAGE1

PROD -> PROD1

}

Troubleshooting

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