Book Image

Mastering Spring Cloud

By : Piotr Mińkowski
Book Image

Mastering Spring Cloud

By: Piotr Mińkowski

Overview of this book

Developing, deploying, and operating cloud applications should be as easy as local applications. This should be the governing principle behind any cloud platform, library, or tool. Spring Cloud–an open-source library–makes it easy to develop JVM applications for the cloud. In this book, you will be introduced to Spring Cloud and will master its features from the application developer's point of view. This book begins by introducing you to microservices for Spring and the available feature set in Spring Cloud. You will learn to configure the Spring Cloud server and run the Eureka server to enable service registration and discovery. Then you will learn about techniques related to load balancing and circuit breaking and utilize all features of the Feign client. The book now delves into advanced topics where you will learn to implement distributed tracing solutions for Spring Cloud and build message-driven microservice architectures. Before running an application on Docker container s, you will master testing and securing techniques with Spring Cloud.
Table of Contents (22 chapters)
Title Page
Copyright and Credits
Packt Upsell

Load balancing rules

Spring Cloud Netflix provides different load balancing algorithms in order to provide different benefits to the user. Your choice of supported method depends on your needs. In the Netflix OSS nomenclature, this algorithm is called a rule. The custom rule class should have implemented an IRule base interface. The following implementations are available by default inside Spring Cloud:

  • RoundRobinRule: This rule simply chooses servers using the well-known round robin algorithm, where incoming requests are distributed across all instances sequentially. It is often used as the default rule or fallbacks for more advanced rules, such as ClientConfigEnabledRoundRobinRule and ZoneAvoidanceRuleZoneAvoidanceRule is the default rule for Ribbon clients.
  • AvailabilityFilteringRule: This rule will skip servers that are marked as circuit tripped or with a high number of concurrent connections. It also uses RoundRobinRule as a base class. By default, an instance is circuit tripped if an...