Nicolas Marchildon elecnix

Continuous deployment of React websites to Amazon S3

This sample includes a continuous deployment pipiline for websites built with React. We use AWS CodePipeline, CodeBuild, and SAM to deploy the application. To deploy the application to S3 using SAM we use a custom CloudFormation resource.

Files included

buildspec.yml: YAML configuration for CodeBuild, this file should be in the root of your code repository
configure.js: Script executed in the build step to generate a config.json file for the application, this is used to include values exported by other CloudFormation stacks (separate services of the same application).
index.js: Custom CloudFormation resource that publishes the website to an S3 bucket. As you can see from the buildspec and SAM template, this function is located in a s3-deployment-custom-resource sub-folder of the repo
app-sam.yaml: Serverless Application model YAML file. This configures the S3 bucket and the cu

Overview

I'm tired of massive delay (500-1000 ms pings) while uploading large files. QoS helps some, but a significant portion remains due to bufferbloat (100-150ms). This leads to delay in VoIP calls and generally sluggish web browsing while uploading.

The new Codel algorithm in OpenWRT / Attitude Adjustment should help a lot. The results below show only ~5-6ms of added latency during uploads (i.e. 14ms vs 500+ms before!). Insane.

These instructions are for the TP-Link TL-WDR4300, because I got a good deal. If you have the money, buy a Netgear WNDR3800 and install CeroWRT, you'll probably see even better results.

Why the TP-Link TL-WDR4300

In short, its fully supported in OpenWRT Attitude Adjustment and works well for my needs:

Cheap

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

	PostDynamoDBTableDataSource:

	This example shows how to setup an environment running Rails 3 under 1.9.2 with a 'rails3' gem set.

	∴ rvm update --head
	# ((Open a new shell)) or do 'rvm reload'

	# If you do not already have the ruby interpreter installed, install it:
	∴ rvm install 1.9.2

	# Switch to 1.9.2-head and gemset rails3, create if it doesn't exist.
	∴ rvm --create use 1.9.2@rails3

	#!/usr/bin/ruby -w
	#
	# tdg - Thread Dump Grapher (any better name?)
	#
	# Given a Java Thread Dump file as argument, it prints out
	# a Grapviz (.dot) to generate a graph that shows which threads
	# are waiting on others for a lock.
	# (tested with a Sun JDK 1.4 thread dump)
	#
	# from: http://neuroning.com/2005/11/24/graphical-thread-dumps