Can you explain client-side and server-side load balancing in microservices?

There are two main types of load balancing: client-side and server-side.

Client-Side Load Balancing:

• The client (e.g., the microservice making the request) is responsible for deciding

how to distribute requests across service instances.

• Example: In Netflix OSS, Ribbon is used for client-side load balancing, where the

client has a list of service instances and decides which one to call based on various

strategies (e.g., round-robin, random).

Server-Side Load Balancing:

• A load balancer (e.g., HAProxy, Nginx, or Kubernetes LoadBalancer) is

responsible for distributing traffic among service instances. The client sends all

requests to the load balancer, which then routes them to appropriate instances.

• Example: In Kubernetes, the service uses an internal load balancer that balances

traffic across multiple pods running the service.