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Service Discovery

The process of automatically detecting devices and services on a network.

Categorycloud

Overview

In dynamic cloud environments, instances and containers are frequently created and destroyed, and their IP addresses change. Service discovery allows applications to find the current location of the services they need to communicate with without hardcoding IP addresses.

Types of Service Discovery

  1. Client-Side Discovery: The client queries a service registry (like Consul or etcd) to find the location of a service and then performs load balancing.
  2. Server-Side Discovery: The client sends a request to a load balancer or proxy (like a Kubernetes Service), which then queries the registry and routes the request to a healthy instance.

Key Components

  • Service Registry: A database containing the locations of all active service instances.
  • Health Checking: Ensuring that only healthy instances are included in the registry.