Dan Van Brunt iDVB

AWS CloudFormation YAML template - appending to list parameter types

Documenting this here, as I often forget (what I have found) is the best way to do this at the moment.

For example, you have a list of two existing security groups given to a stack and wish to create (and use) a third - attaching all to an ALB:

AWSTemplateFormatVersion: '2010-09-09'
Description: Example template

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

This is a mix between two sources:

basically the first resource is great but didn't work for me: I had to remove the trailing "/*" in the resource string to make it work. I also noticed that setting the policy on the source bucket was sufficient. In the end these are the exact steps I followed to copy data between two buckets on two accounts

Basically the idea there is:

we allowe the destination account to read the source bucket (in the console for the source account)
we log as the destination and start the copy

	---
	Description: AWS AppSync Notes API

	Parameters:
	APIName:
	Type: String
	Description: Name of the API - used to generate unique names for resources
	MinLength: 3
	MaxLength: 20
	AllowedPattern: '^[a-zA-Z][a-zA-Z0-9_]*$'

	---
	Description: AWSAppSync DynamoDB Example
	Resources:
	GraphQLApi:
	Type: "AWS::AppSync::GraphQLApi"
	Properties:
	Name: AWSAppSync DynamoDB Example
	AuthenticationType: AWS_IAM

	PostDynamoDBTableDataSource:

	service: my-api-gateway

	provider:
	name: aws
	runtime: nodejs6.10
	region: sa-east-1
	stage: v1
	deploymentBucket: ${env:DEPLOYMENT_BUCKET}
	iamRoleStatements:
	- Effect: Allow

	'use strict';
	import React from 'react';


	export default class Clearfix extends React.Component {
	render() {
	const beforeStyle = {
	display: 'table'
	};

	import { Component } from "React";

	export var Enhance = ComposedComponent => class extends Component {
	constructor() {
	this.state = { data: null };
	}
	componentDidMount() {
	this.setState({ data: 'Hello' });
	}
	render() {

	configureDragDrop(registerType) {
	var imageThreshold = Math.max(120, window.innerHeight / 4),
	sectionThreshold = Math.max(140, window.innerHeight / 4),
	currentDY = 0,
	frame;

	function makeScrollingHandler(threshold) {
	function getScrollDY(clientY) {
	var speed;
	if (clientY < threshold) {

	"UserData": {
	"Fn::Base64": { "Fn::Join":["", [
	"#!/bin/bash -ex\n",
	"apt-get update\n",
	"apt-get -y install python-setuptools\n",
	"mkdir aws-cfn-bootstrap-latest\n",
	"curl https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz \| tar xz -C aws-cfn-bootstrap-latest --strip-components 1\n",
	"easy_install aws-cfn-bootstrap-latest\n",
	"/usr/local/bin/cfn-init --stack ", { "Ref":"AWS::StackName" }, " --resource WebServer", " --region ", { "Ref": "AWS::Region" }, "\n",
	"\n",