AWS Route 53 — DNS·라우팅 정책·헬스체크 완전 가이드

# 퍼블릭 호스팅 영역 생성
aws route53 create-hosted-zone \
  --name example.com \
  --caller-reference "$(date +%s)"

# 할당된 네임서버 확인
aws route53 get-hosted-zone --id Z123456ABCDEFG \
  --query 'DelegationSet.NameServers'

# change-batch.json
cat > change-batch.json <<'JSON'
{
  "Comment": "웹 서버 A 레코드 추가",
  "Changes": [
    {
      "Action": "UPSERT",
      "ResourceRecordSet": {
        "Name": "www.example.com",
        "Type": "A",
        "TTL": 300,
        "ResourceRecords": [{ "Value": "203.0.113.10" }]
      }
    }
  ]
}
JSON

aws route53 change-resource-record-sets \
  --hosted-zone-id Z123456ABCDEFG \
  --change-batch file://change-batch.json

aws route53 create-health-check \
  --caller-reference "$(date +%s)" \
  --health-check-config '{
    "Type": "HTTPS",
    "FullyQualifiedDomainName": "www.example.com",
    "Port": 443,
    "ResourcePath": "/health",
    "RequestInterval": 30,
    "FailureThreshold": 3
  }'

{
  "Action": "UPSERT",
  "ResourceRecordSet": {
    "Name": "app.example.com", "Type": "A", "TTL": 60,
    "SetIdentifier": "v2-canary",
    "Weight": 10,
    "ResourceRecords": [{ "Value": "203.0.113.20" }]
  }
}

{
  "Name": "api.example.com", "Type": "A", "TTL": 60,
  "SetIdentifier": "seoul",
  "Region": "ap-northeast-2",
  "ResourceRecords": [{ "Value": "203.0.113.30" }]
}

{
  "Name": "www.example.com", "Type": "A", "TTL": 60,
  "SetIdentifier": "primary",
  "Failover": "PRIMARY",
  "HealthCheckId": "abcd-1234-health",
  "ResourceRecords": [{ "Value": "203.0.113.10" }]
}

{
  "Name": "www.example.com", "Type": "A", "TTL": 60,
  "SetIdentifier": "korea",
  "GeoLocation": { "CountryCode": "KR" },
  "ResourceRecords": [{ "Value": "203.0.113.40" }]
}