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DevOps Intermediate

What is Service Discovery?

A mechanism that automatically detects and tracks the network locations of service instances in distributed systems.

In dynamic environments where service instances are constantly created and destroyed, service discovery eliminates hardcoded addresses. Services register themselves when starting and deregister when stopping. Clients query the discovery system to find available instances. Tools include Consul (HashiCorp), etcd, ZooKeeper, and DNS-based discovery in Kubernetes. Client-side discovery (the client picks an instance) and server-side discovery (a load balancer routes requests) are the two main patterns. Service discovery is foundational for microservices architectures and container orchestration.

Related Terms

Continuous Deployment
A practice where every code change that passes automated tests is automatically deployed to production.
Monitoring
The practice of collecting, analyzing, and alerting on system metrics and logs to ensure application health and performance.
Environment Variable
A dynamic value stored outside the application code that configures behavior without hardcoding sensitive or environment-specific data.
Immutable Infrastructure
An approach where servers are never modified after deployment — changes require building and deploying entirely new server instances.
Container Registry
A storage and distribution service for container images, similar to a package repository but for Docker images.
Incident Management
The process of detecting, responding to, and resolving service disruptions to minimize impact and restore normal operations.
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