Create dns records on route53 from a text file

create_dns_records.sh

#!/bin/bash -e

usage() {
    echo "Need a hosted zone name (abc.com.) with the dot on the end"
    exit 1
}

HOSTED_ZONE_NAME=$1
if [[ "$HOSTED_ZONE_NAME" == "" ]] ; then
    usage
fi

HOSTED_ZONE_ID=$(aws route53 list-hosted-zones-by-name | jq -r ".HostedZones[] | select(.Name == \"$HOSTED_ZONE_NAME\").Id " | sed -e 's/\/hostedzone\///g')
if [[ "$HOSTED_ZONE_ID" == "" ]] ; then
    echo "Couldn't find hosted zone"
    usage
fi

while read NAME VALUE; do
    echo $NAME $VALUE
    JSON=$(cat <<EOF
{
    "HostedZoneId": "$HOSTED_ZONE_ID",
    "ChangeBatch": {
        "Changes": [
            {
                "Action":"UPSERT",
                "ResourceRecordSet": {
                    "Name": "$NAME",
                    "Type": "CNAME",
                    "TTL": 300,
                    "ResourceRecords": [
                        {
                            "Value": "$VALUE"
                        }
                    ]
                }
            }
        ]
    }
}
EOF
    )
    aws route53 change-resource-record-sets --cli-input-json "$JSON"
done < dns.txt