Route 53

ELI5 — The Vibe Check

Route 53 is Amazon's DNS service — it translates domain names like 'myapp.com' into IP addresses so browsers can find your server. Named after port 53 (the DNS port). It also does health checks and can automatically redirect traffic away from broken servers.

Real Talk

Amazon Route 53 is a scalable, highly available DNS web service. It supports domain registration, DNS routing (simple, weighted, latency-based, geolocation, failover), health checks, and traffic management. It can route traffic to AWS resources or external endpoints.

Show Me The Code

# Create a DNS record pointing to a load balancer
aws route53 change-resource-record-sets \
  --hosted-zone-id Z123456 \
  --change-batch '{
    "Changes": [{
      "Action": "CREATE",
      "ResourceRecordSet": {
        "Name": "api.myapp.com",
        "Type": "A",
        "AliasTarget": { "HostedZoneId": "Z...", "DNSName": "my-alb.amazonaws.com", "EvaluateTargetHealth": true }
      }
    }]
  }'

When You'll Hear This

"Update Route 53 to point the domain at the new load balancer." / "Route 53 health checks will failover to the backup region automatically."