Spring Cloud Netflix OSS Microservices (Demo)

Microservices demo using Netflix OSS and Spring Cloud framework.

Patterns, technologies demonstrated here:

• Service registry and discovery: Eureka.
• API gateway: Spring Cloud Gateway.
• Client side load balancing: Ribbon.
• Externalized configuration: Spring Cloud Config.
• Circuit breaker: Hystrix, Hystrix Dashboard.
• Distributed tracing: Sleuth, Zipkin.
• Monitoring: Spring Boot Admin.
• App Containerization: Docker, Docker Compose and Jib.

Table of Content

• Architecture
• Services
• Getting Started
  • Installation
    • Local
    • Docker
  • Usage
• References
• License

Architecture

Services

This demo consists of 7 different services:

1. config-server
2. service-registry
3. admin-dashboard
4. api-gateway
5. hello-service
6. user-service
7. zipkin

Getting Started

Installation

Local

Please refer to the individual readme files on instructions of how to run/build the services.

Docker

• You can build all docker images by running the buildDockerImages.sh on Mac/Linux systems or by going to each individual directory and following installation guide.

• Verify if all images exists, using docker images | grep -w "com.rbiedrawa.cloud.microservices" command.

  com.rbiedrawa.cloud.microservices/hello-service        0.0.1-SNAPSHOT
  com.rbiedrawa.cloud.microservices/user-service         0.0.1-SNAPSHOT 
  com.rbiedrawa.cloud.microservices/service-registry     0.0.1-SNAPSHOT 
  com.rbiedrawa.cloud.microservices/admin-dashboard      0.0.1-SNAPSHOT 
  com.rbiedrawa.cloud.microservices/config-server        0.0.1-SNAPSHOT 
  com.rbiedrawa.cloud.microservices/api-gateway          0.0.1-SNAPSHOT 
  

• Go to docker subdirectory.

• Start zipkin and config-server:

  docker-compose up -d config-server zipkin

• Start service-registry and admin-dashboard:

  docker-compose up -d service-registry admin-dashboard

• Start api-gateway and microservices (hello-service , user-service)

  docker-compose up -d api-gateway hello-service user-service

• Check if all containers are running, using docker-compose ps command.

  # Sample output
  
       Name                    Command                  State                    Ports              
  ---------------------------------------------------------------------------------------------------
  admin-dashboard    java -cp /app/resources:/a ...   Up             0.0.0.0:8085->8085/tcp          
  api-gateway        java -cp /app/resources:/a ...   Up             0.0.0.0:8082->8082/tcp          
  config-server      java -cp /app/resources:/a ...   Up             0.0.0.0:8888->8888/tcp          
  hello-service      java -cp /app/resources:/a ...   Up             0.0.0.0:8080->8080/tcp          
  service-registry   java -cp /app/resources:/a ...   Up             0.0.0.0:8761->8761/tcp          
  user-service       java -cp /app/resources:/a ...   Up             0.0.0.0:8081->8081/tcp          
  zipkin             start-zipkin                     Up (healthy)   9410/tcp, 0.0.0.0:9411->9411/tcp

Usage

• Start services.

• Generate some traffic using ./applications/api-gateway/simulate-api-gateway-traffic.sh shell script or by going to individual api gateway enpoints.

• Visit Zipkin, spring boot admin, eureka and hystrix dashboard.

• More details can be found in individual readme files (Usage section).

References

• Spring Cloud Gateway
• Spring Cloud Config
• Spring Cloud Netflix
• Eureka
• Spring Boot Admin
• Hystrix - Circuit Breaker
• Hystrix Dashboard for Spring Boot Admin 2.x
• Hystrix Dashboard
• Zipkin

License

Distributed under the MIT License. See LICENSE for more information.