AWS Route53 subdomain delegation

aws_route53_subdomain.sh

# You have defined the "cna.example.cloud" zone in Route53
# You want to create subdomain "${USER}-k8s.cna.example.cloud" and configure proper delegation form parrent zone

echo "* Create DNS zone ${USER}-k8s.cna.example.cloud"

aws route53 create-hosted-zone --output json \
  --name ${USER}-k8s.cna.example.cloud \
  --caller-reference "$(date)" \
  --hosted-zone-config="{\"Comment\": \"Created by ${USER}@example.com\", \"PrivateZone\": false}" | jq

echo "* Get the NS servers from the new zone ${USER}-k8s.cna.example.cloud"

NEW_ZONE_ID=$(aws route53 list-hosted-zones --query "HostedZones[?Name==\`${USER}-k8s.cna.example.cloud.\`].Id" --output text)
NEW_ZONE_NS1=$(aws route53 get-hosted-zone --output json --id ${NEW_ZONE_ID} --query "DelegationSet.NameServers" | jq -r '.[0]')
NEW_ZONE_NS2=$(aws route53 get-hosted-zone --output json --id ${NEW_ZONE_ID} --query "DelegationSet.NameServers" | jq -r '.[1]')
NEW_ZONE_NS3=$(aws route53 get-hosted-zone --output json --id ${NEW_ZONE_ID} --query "DelegationSet.NameServers" | jq -r '.[2]')
NEW_ZONE_NS4=$(aws route53 get-hosted-zone --output json --id ${NEW_ZONE_ID} --query "DelegationSet.NameServers" | jq -r '.[3]')

echo '* Create the NS record in "cna.example.cloud" for proper zone delegation'

ORIG_ZONE_ID=$(aws route53 list-hosted-zones --query "HostedZones[?Name==\`cna.example.cloud.\`].Id" --output text)
cat << EOF | aws route53 change-resource-record-sets --output json --hosted-zone-id ${ORIG_ZONE_ID} --change-batch file:///dev/stdin | jq
{
  "Comment": "Create a subdomain NS record in the parent domain",
  "Changes": [
    {
      "Action": "CREATE",
      "ResourceRecordSet": {
        "Name": "${USER}-k8s.cna.example.cloud",
        "Type": "NS",
            "TTL": 30,
        "ResourceRecords": [
          {
            "Value": "${NEW_ZONE_NS1}"
          },
          {
            "Value": "${NEW_ZONE_NS2}"
          },
          {
            "Value": "${NEW_ZONE_NS3}"
          },
          {
            "Value": "${NEW_ZONE_NS4}"
          }
        ]
      }
    }
  ]
}
EOF