Document Load Balancing in Spring Cloud Netflix

[Naveenkumarsandu]

Documentation Request: Load Balancing in Spring Cloud Netflix

Overview

Spring Cloud Netflix provides integrated load balancing capabilities primarily via Spring Cloud LoadBalancer and Eureka service discovery. Clear documentation will help users understand:

• How load balancing works with Eureka and Spring Cloud LoadBalancer
• Key configuration properties
• Zone-preference logic and metadata
• How to enable/disable or customize load balancing for services
• Best practices and common pitfalls

Core Areas to Cover

• Spring Cloud LoadBalancer Usage
  • How service instances are selected for requests
  • Relationship to DiscoveryClient and logical Eureka service identifiers (VIPs)
• Zone Preference and Configuration
  • How zone is determined (instance metadata, hostname, client config)
  • The role of spring.cloud.loadbalancer.eureka.approximateZoneFromHostname
• Properties and Customization
  • Main configuration properties (with sample values)
  • Example YAML/Java configuration snippets
• Eureka Metadata & Filtering
  • Use of eureka.instance.metadataMap.zone
• Troubleshooting Tips
  • Common misconfigurations
  • How to verify load balancing behavior in logs
• References to Source Code
  • EurekaLoadBalancerProperties.java
  • EurekaLoadBalancerClientConfiguration.java

Benefit

Improved documentation will assist users in comprehending, enabling, and troubleshooting load balancing in Spring Cloud Netflix microservice deployments.