AWS Route 53 — DNS a Traffic Management

Route 53 routing policies, health checks, DNS failover a DNSSEC.

Routing Policies

• Simple — round-robin
• Weighted — distribuce podle váhy (canary)
• Latency-based — nejbližší region
• Failover — active-passive + health check
• Geolocation — podle lokality uživatele

Health Checks

resource "aws_route53_health_check" "api" {
  fqdn              = "api.example.com"
  port              = 443
  type              = "HTTPS"
  resource_path     = "/health"
  failure_threshold = 3
  request_interval  = 30
}

DNSSEC

Route 53 podporuje DNSSEC signing — ochrana proti DNS spoofing s KMS klíčem.

Shrnutí

Route 53 = globální traffic management. Health checks + failover routing = vysoká dostupnost.