| What is need for Cloud? |
| What is Spring Cloud Ribbon? |
| What is Spring Cloud Config? |
| What is Spring Cloud Consul? |
| What is the use of Spring Cloud stream? |
| What is Netflix Feign? What are its advantages? |
| What is Eureka in Spring Cloud? |
| What is the purpose of the Hystrix circuit breaker? |
| What is the use of the Spring cloud bus? |
| What is RAD model? |
| What is a service fuse? What is service degradation |
| What are the benefits of using cloud? |
| What are the features of Spring Cloud? |
| How does Spring Cloud Gateway Limit Request Payload Size? |
| Name the features of using Spring Boot? |
| What does one mean by Service Registration and Discovery? How is it implemented in Spring Cloud? |
| What does service registration and discovery mean? How is Spring Cloud implemented? |
| What is microservice? |
| Which design pattern are used in Microservices? |
| What is Spring Cloud? |
| What are the advantages of using Spring Cloud? |
| What does service registration and discovery mean? How is Spring Cloud implemented? |
| What is the meaning of load balancing? |
| What is Hystrix? How does it achieve fault tolerance? |
| What is Netflix Feign? What are its advantages? |
| What is Spring Cloud Bus? Do we need it? |
| What is microservice |
| What is a service fuse? What is service degradation |
| What is the difference between SpringBoot and SpringCloud? |
| What is the difference between spring cloud and d bbo? |
| What is eureka’s self-protection mechanism? |
| What is Ribbon? |
| What is feigin? What are its advantages? |
| What is Spring Cloud Bus? |
| What is Ribbon load balancing? |
| What can Ribbon load balancing do? |
| What is zuul routing gateway |
| What can a distributed configuration center do? |
| How do microservices communicate independently? |
| How does springcloud register services? |
| Comparison of REST and RPC |
| As a business registration center, how is Eureka better than Zookeeper? |
| Both Eureka and zookeeper can provide service registration and discovery functions, please tell us the difference between the two? |
| Spring Cloud Gateway? |
| Talk about the implementation principle of RPC |
| The advantages and disadvantages of microservices? Let me talk about the pits encountered in development projects? |
| The microservice technology stack you know? |
| The difference between Eureka and Zookeeper |
| The difference between Ribbon and Feign? |
| The role of springcloud circuit breaker? |
Spring cloud
CI Pipeline and Testing
Feign client
Consul
Zookeeper
- Cloud-native based development
- Microservice-based architecture
- Inter-service communication
- Follows the Spring Boot model
- It is cloud-agnostic
- It is a centralized application that manages all the application related configuration properties.
- It is the automatic detection of devices and services over the network
- The central server that maintains a global view of the address.
- The clients that connect to the central server can update and retrieve the address. Discovery patterns: Client-side discovery and Server-side discovery.
Circuit Breakers - Hystrix Server
- Netflix has created a library called Hystrix. It implements the circuit breakers pattern.
- It calculate when to open and close the circuit and what to do in case of failure.
- When all services fail at some point, it handles these failures gracefully.
- States: OPEN, CLOSED, and HALF-OPEN State.
Routing and Messaging
- Spring Cloud supports communication via messaging or HTTP request.
- Routing uses Netflix Ribbon and Open Feign while messaging uses Kafka or Rabbit MQ.
API Gateway
- It allows us to route API request (external or internal) to connect services
- Predicates and filters are specific to routes
- Hystrix circuit Breaker integration
- Spring Cloud Discovery Client integration
- Request Rate Limiting
- Path rewriting
Tracing
- We can add Spring Cloud Sleuth library in our project to enable tracing.
- It is responsible for recording timing, which is used for latency analysis. We can export this timing to Zipkin.
Zipkin - Distributed server
- It provides a mechanism for sending, receiving, and visualization traces
- It is a distributed tracing tool specially designed for analyzing latency problem inside the microservice architecture.
- It exposes HTTP endpoint used for collecting input data.
- If we required to add tracing in our project, we should add the spring-cloud-starter-zipkin dependency.
- The sampling policy allows us how much input traffic is sent to Zipkin for analysis. To enable this feature, we have to add the spring-cloud-sleuth-stream dependency.
Sleuth
- It introduces unique IDs to your logging which are consistent between microservice calls which makes it possible to find how a single request travels from one microservice to the next.
- Spring Cloud Sleuth adds two types of IDs to your logging, one called a trace ID and the other called a span ID.
Feign client
Consul
Zookeeper
NETFLIX OSS
- Cloud config server - Central config Server
- Netflix Eureka - Service Discovery server
- Netflix Ribbon - Dynamic Routing and load balancer
- Netflix Zuul - Edge server
- Turbine
- Hystrix - Circuit breaker
- ELK - Centralized log analysis
Port no
- 8888- Spring Cloud Config Server
- 8761- Netflix Eureka Naming Server
- 8765- Netflix Zuul API gateway Server
- 9411- Zipkin distributed Tracing Server
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