https://github.com/sandysanthosh/spring-boot-cloud
Spring Boot Cloud
https://github.com/sandysanthosh/spring-boot-cloud
Last synced: 10 months ago
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Spring Boot Cloud
- Host: GitHub
- URL: https://github.com/sandysanthosh/spring-boot-cloud
- Owner: sandysanthosh
- License: apache-2.0
- Created: 2024-11-18T13:58:03.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2024-11-18T13:58:26.000Z (about 1 year ago)
- Last Synced: 2025-01-25T13:25:45.176Z (12 months ago)
- Size: 7.81 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
Spring Boot Cloud is a part of the **Spring Cloud** suite, which is designed to help developers create microservices-based architecture with Spring Boot. It provides tools to build and manage distributed systems, enabling the creation of scalable and resilient applications using cloud-native practices.
Here's a breakdown of some core components and features of Spring Cloud:
### 1. **Service Discovery**
- **Eureka**: A service registry by Netflix, which helps in locating services for the purpose of load balancing and failover.
- **Consul/Zookeeper**: Other alternatives to Eureka, both providing similar capabilities for service discovery.
### 2. **Client-Side Load Balancing**
- **Ribbon**: Client-side load balancing which works alongside Eureka to distribute load across multiple service instances.
- **Spring Cloud LoadBalancer**: A newer and preferred alternative to Ribbon.
### 3. **API Gateway**
- **Spring Cloud Gateway**: A modern API Gateway for routing requests, filtering, and handling cross-cutting concerns like security and monitoring.
- **Zuul**: An older gateway solution by Netflix, though Spring Cloud Gateway is the recommended option now.
### 4. **Configuration Management**
- **Spring Cloud Config**: A centralized configuration service that allows storing all configurations in a central location (like Git or a database) and can be accessed by different microservices.
### 5. **Circuit Breakers & Resilience**
- **Resilience4j**: A library that provides circuit breakers, rate limiters, retries, and other resiliency patterns to protect microservices from failures.
- **Hystrix**: An older Netflix library for circuit breakers, though it’s no longer actively maintained (Resilience4j is the preferred alternative).
### 6. **Distributed Tracing & Monitoring**
- **Spring Cloud Sleuth**: For distributed tracing by adding unique IDs to each request that flows through the system, making it easier to track requests.
- **Zipkin**: A distributed tracing system that integrates with Sleuth for visualization of traces.
### 7. **Messaging & Event Handling**
- **Spring Cloud Stream**: Framework for building event-driven microservices using messaging systems like Kafka, RabbitMQ, etc.
- **Spring Cloud Bus**: A lightweight message broker connecting nodes for broadcasting state changes or config updates.
### 8. **Security**
- **Spring Security**: Can be integrated with Spring Cloud to secure microservices.
- **OAuth2/OpenID Connect**: Use Spring Security with OAuth2 for secure authentication/authorization in distributed environments.
### 9. **Serverless & Function as a Service**
- **Spring Cloud Function**: A project for implementing serverless programming, allowing developers to write business logic as functions that can be deployed in various environments.
### 10. **Distributed Configuration & Secret Management**
- **Vault**: Spring Cloud integrates with tools like HashiCorp Vault for secret management.
- **Spring Cloud Config Server**: Manages distributed configurations and allows refreshing configurations without restarting services.
### Basic Setup Example
Here's a simple example to get started with Spring Cloud and Spring Boot:
#### 1. **Dependencies (Maven example)**
In your `pom.xml`, add the necessary Spring Cloud dependencies:
```xml
org.springframework.boot
spring-boot-starter-web
org.springframework.cloud
spring-cloud-starter-netflix-eureka-client
org.springframework.cloud
spring-cloud-starter-config
org.springframework.cloud
spring-cloud-starter-gateway
```
#### 2. **Application Properties Example**
Here’s an example configuration for a microservice registered with Eureka:
```properties
# application.properties
spring.application.name=your-microservice
server.port=8080
# Eureka Client Configuration
eureka.client.service-url.defaultZone=http://localhost:8761/eureka/
```
#### 3. **Configuring a Service Registry (Eureka)**
Create a new Spring Boot application as a Eureka server:
```java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServerApplication.class, args);
}
}
```
Add the following in `application.properties`:
```properties
# application.properties for Eureka Server
server.port=8761
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
```
### Additional Tips
- **Use Spring Initializr**: The easiest way to bootstrap Spring Cloud projects with the required dependencies.
- **Explore Spring Cloud Kubernetes** if you're planning to deploy microservices on Kubernetes.
Let me know if you need a deeper dive into any specific aspect or code examples!