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Lee Gilmore leegilmorecode

Serverless Hero

leegilmorecode / create-sale.ts

Created June 29, 2022 11:19

An example of a Lambda which is utilising error messages and schemas at build time which are locale specific

	import {
	APIGatewayEvent,
	APIGatewayProxyHandler,
	APIGatewayProxyResult,
	} from "aws-lambda";

	// we import these values which are locale aware
	import { errorMessages } from "@shared/error-messages";
	import { schema } from "./create-sale.schema";
	import { stringFormat } from "@shared/string-format";

leegilmorecode / lambdas.ts

Created June 29, 2022 11:16

Dynamically changing the lambda entry point based on locale

	import * as lambda from "aws-cdk-lib/aws-lambda";
	import * as nodeLambda from "aws-cdk-lib/aws-lambda-nodejs";
	import * as path from "path";

	import { dynamicPath, getLocale } from "@shared/dynamic-imports";

	export const getSalesLambdaProps: nodeLambda.NodejsFunctionProps = {
	runtime: lambda.Runtime.NODEJS_14_X,
	functionName: "getSalesLambda",
	// the entry point utilises our dynamic path generator

leegilmorecode / sale-stack.ts

Created June 29, 2022 11:13

Example of a stack which has its properties defined at build time depending on the locale

	import * as apigw from "aws-cdk-lib/aws-apigateway";
	import * as nodeLambda from "aws-cdk-lib/aws-lambda-nodejs";

	import { Stack, StackProps } from "aws-cdk-lib";

	import { Construct } from "constructs";

	interface SalesProps extends StackProps {
	apiProps: apigw.RestApiProps;
	getSalesLambdaProps: nodeLambda.NodejsFunctionProps;

leegilmorecode / dynamic-imprt.ts

Created June 29, 2022 11:10

Example of dynamically importing modules based on locale environment variable

	import * as fs from "fs";
	import * as path from "path";

	function rootDir(): string {
	return __dirname;
	}

	// function to return the locale lowercase
	export function getLocale(): string {
	if (!process.env.LOCALE) {

leegilmorecode / sales.ts

Created June 29, 2022 11:07

Example of a CDK stack having the properties for the infra pulled in at build time based on locale

	#!/usr/bin/env node

	import "source-map-support/register";

	import * as apigw from "aws-cdk-lib/aws-apigateway";
	import * as cdk from "aws-cdk-lib";
	import * as nodeLambda from "aws-cdk-lib/aws-lambda-nodejs";

	import { SalesStack } from "@lib/sales-stack";
	import { dynamicImport } from "@shared/dynamic-imports";

leegilmorecode / archive.ts

Created June 12, 2022 07:22

An example of using Archive and Replay with EventBridge in the CDK

	// create the tires orders event bus
	const ordersEventBus: events.EventBus = new events.EventBus(
	this,
	"orders-event-bus",
	{
	eventBusName: "orders-event-bus",
	}
	);
	ordersEventBus.applyRemovalPolicy(RemovalPolicy.DESTROY);

leegilmorecode / waf.ts

Created June 11, 2022 18:12

Example of using AWS WAF with API Gateway to restrict to whitelisted API source

	// create the waf ip set for the api
	const webAclIPSet = new waf.CfnIPSet(this, "TiresWhitelistIpSet", {
	name: "tires-whitelist-ip-set",
	addresses: [`${props.ordersApiIp}/32`], // the source orders api ip address which we allow
	ipAddressVersion: "IPV4",
	scope: "REGIONAL",
	description: "tires api ip set",
	});

	const webacl = new waf.CfnWebACL(this, "TiresWhitelistWebAcl", {

leegilmorecode / adding-pitr-to-dynamodb-table.ts

Last active June 4, 2022 07:42

Example of adding point in time recovery to a DynamoDB table in the CDK

	// create the stock table for storing the tire orders
	const stockTable: dynamodb.Table = new dynamodb.Table(
	this,
	"StockOrdersTable",
	{
	billingMode: dynamodb.BillingMode.PAY_PER_REQUEST,
	encryption: dynamodb.TableEncryption.AWS_MANAGED,
	pointInTimeRecovery: true, // we add point in time recovery for our table
	tableName: "StockOrders",
	contributorInsightsEnabled: true,

leegilmorecode / add-vpc-flow-logs.ts

Created June 4, 2022 07:24

Example of adding VPC Flow Logs to our VPC which are logged to CloudWatch

	// ensure our flow logs go to cloudwatch
	vpc.addFlowLog("FlowLogS3", {
	destination: ec2.FlowLogDestination.toCloudWatchLogs(),
	trafficType: ec2.FlowLogTrafficType.ALL,
	});

leegilmorecode / get-eip-of-nat-gateway.ts

Created June 4, 2022 07:17

Example of getting the elastic ip address of our nat gateway (one in this example)

	// create the vpc for the car company solution
	const vpc: ec2.Vpc = new ec2.Vpc(this, "CarOrdersVPC", {
	cidr: "10.0.0.0/16",
	maxAzs: 2, // for the demo only lets add 2 az's note: in production this should be at least 3
	natGateways: 1, // The nat gateway has to be provisioned in a public subnet, with a public ip address to access the internet through internet gateway
	subnetConfiguration: [
	{
	cidrMask: 24,
	name: "private-subnet",
	subnetType: ec2.SubnetType.PRIVATE_WITH_NAT,