dns.js

const name = "<some domain>";
const AWS = require("aws-sdk");
const route53 = new AWS.Route53();
const DNS = require("@google-cloud/dns");
const dns = new DNS({projectId: "<your project id>"});
const dnsZone = dns.zone("<zone name>");

const resolvers = [ // See note below -- set to the NS for your zone
	"<dns server 1>",
	"<dns server 2>"//, ...
].map(ip => {
	const {Resolver} = require("dns");
	const resolver = new Resolver();
	resolver.setServers([ip]);
	return resolver;
});

function check(resolver) {
	return new Promise(resolve => {
		resolver.resolve4(name, (err, addresses) => {
			// c-ares sends NXDOMAIN (the code we care about) as ENOTFOUND, but
			// we don't want any error to be fatal here either.
			console.log(Date.now(), resolver.getServers()[0], !err);
			resolve();
		});
	});
}

function checkAll() {
	Promise.all(resolvers.map(check)).then(() => setTimeout(checkAll));
}

checkAll();

// Do one of these at a time, adjusting the resolves array above accordingly:
////// GCP
dnsZone.addRecords(dnsZone.record("A", {
	name: `${name}.`,
	data: "123.123.123.123",
	ttl: 60
}));
////// AWS
route53.changeResourceRecordSets({
	ChangeBatch: {
		Changes: [
			{
				Action: "CREATE",
				ResourceRecordSet: {
					Name: `${name}.`,
					ResourceRecords: [{
						Value: "123.123.123.123"
					}],
					TTL: 60,
					Type: "A"
				}
			}
		]
	},
	HostedZoneId: "<hosted zone ID>"
}, (err, data) => {
	console.log("ADDED RECORD", err);
});

console.log(Date.now(), "ADDRECORD");