Service Discovery — Complete Guide
Service Discovery — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of AWS Cloud Tutorial on Toolliyo Academy.
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AWS Cloud Tutorial · Lesson 73 of 100
Service Discovery
Core services ✓ → Projects
Projects · 2 — Deploy · ~10 min · AWS — Cloud-Native & Microservices
What is this?
AWS Cloud Map provides DNS and API-based service discovery so microservices find each other without hard-coded IPs.
Why should you care?
AwsVerse ECS tasks register automatically so order-service resolves inventory-service.awsverse.local.
See it live — copy this example
Run in AWS CloudShell / local AWS CLI v2, or follow the matching steps in the AWS Console (Free Tier).
aws servicediscovery create-service \
--name inventory \
--namespace-id ns-abc123 \
--dns-config 'NamespaceId=ns-abc123,DnsRecords=[{Type=A,TTL=10}]' \
--health-check-custom-config FailureThreshold=1What happened?
- Creates Cloud Map service in private DNS namespace.
- ECS service registries attach tasks as they start and deregister on stop.
Practice next
- Create private DNS namespace awsverse.local.
- Register ECS service with Cloud Map.
- From peer task: curl http://inventory.awsverse.local:8080/health.
- Compare Cloud Map vs Route53 private hosted zones.
- Add HTTP health check on registry.
Remember
Cloud Map = dynamic service registry. Private DNS for VPC services. ECS/EKS integrate natively.
AwsVerse internal DNS
Inventory tasks scale; IPs change hourly.
Outcome: Cloud Map keeps order-service lookups current without config reload.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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