CLI to add DNS Records in Route53

add-dns-record.sh

#!/bin/bash

## Allows for creation of "Basic" DNS records in a Route53 hosted zone

function main() {
        zone_name=$1
        record_name=$2
        record_value=$3

        [[ -z $record_value  ]] && usage && exit 1

        ## set some defaults if variables haven't been overridden on script execute
        action=${action:-CREATE}
        record_type=${record_type:-A}
        ttl=${ttl:-300}
        wait_for_sync=${wait_for_sync:-false}

        change_id=$(submit_resource_record_change_set) || exit 1
        echo "Record change submitted! Change Id: $change_id"
        if $wait_for_sync; then
                echo -n "Waiting for all Route53 DNS to be in sync..."
                until [[ $(get_change_status $change_id) == "INSYNC" ]]; do
                        echo -n "."
                        sleep 5
                done
                echo "!"
                echo "Your record change has now propogated."
        fi
        echo 'Thank you for using "The Cloud".'
}

function change_batch() {
        jq -c -n "{\"Changes\": [{\"Action\": \"$action\", \"ResourceRecordSet\": {\"Name\": \"$record_name\", \"Type\": \"$record_type\", \"TTL\": $ttl, \"ResourceRecords\": [{\"Value\": \"$record_value\"} ] } } ] }"
}

function get_change_status() {
        aws route53 get-change --id $1 | jq -r '.ChangeInfo.Status'
}

function hosted_zone_id() {
   aws route53 list-hosted-zones | jq -r ".HostedZones[] | select(.Name == \"${zone_name}\") | .Id" | cut -d'/' -f3
}

function submit_resource_record_change_set() {
        aws route53 change-resource-record-sets --hosted-zone-id $(hosted_zone_id) --change-batch $(change_batch) | jq -r '.ChangeInfo.Id' | cut -d'/' -f3
}

function usage() {
        echo "usage: $0 <zone_name> <record_name> <record_value>"
        echo ""
        echo "possible env config settings and their defaults:"
        echo "  - action=CREATE"
        echo "  - ttl=300"
        echo "  - record_type=A"
        echo "  - wait_for_sync=false"
        echo ""
}

main $1 $2 $3