CHANG-NING TSAI crazyguitar

Running Docker on two hosts, bridged with Open vSwitch

This Gist shows how to use Open vSwitch to bridge Docker containers on two hosts. It is based on this blog post http://goldmann.pl/blog/2014/01/21/connecting-docker-containers-on-multiple-hosts/.

A similar Gist using Tinc instead of Open vSwitch is available: https://gist.github.com/noteed/11031504.

Setup

Git Submodules - Basic Explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a sub-repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

Separate big codebases into multiple repositories.

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

An introduction to DynamoDB

DynamoDB is a powerful, fully managed, low latency, NoSQL database service provided by Amazon. DynamoDB allows you to pay for dedicated throughput, with predictable performance for "any level of request traffic". Scalability is handled for you, and data is replicated across multiple availability zones automatically. Amazon handles all of the pain points associated with managing a distributed datastore for you, including replication, load balancing, provisioning, and backups. All that is left is for you to take your data, and its access patterns, and make it work in the denormalized world of NoSQL.

Modeling your data

The single most important part of using DynamoDB begins before you ever put data into it: designing the table(s) and keys. Keys (Amazon calls them primary keys) can be composed of one attribute, called a hash key, or a compound key called the hash and range key. The key is used to uniquely identify an item in a table. The choice of the primary key is particularl

This is a comparison of the different formatting styles including with clang-format.

Generated via:

styles=( LLVM Google Chromium Mozilla WebKit )
for style in $styles
do
  clang-format -style=$style ChLcpIterativeAPGD.h > ChLcpIterativeAPGD.$style.h

done

Simple collection of Groovy scripts to help me maintain some Jenkins systems.

See also https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Script+Console

Please comment & let me know if you have a fork / fixes you'd like to include.

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

	def verify_sign(public_key_loc, signature, data):
	'''
	Verifies with a public key from whom the data came that it was indeed
	signed by their private key
	param: public_key_loc Path to public key
	param: signature String signature to be verified
	return: Boolean. True if the signature is valid; False otherwise.
	'''
	from Crypto.PublicKey import RSA
	from Crypto.Signature import PKCS1_v1_5

	#!/bin/sh

	# To the extent possible under law, Viktor Szakats
	# has waived all copyright and related or neighboring rights to this
	# script.
	# CC0 - https://creativecommons.org/publicdomain/zero/1.0/
	# SPDX-License-Identifier: CC0-1.0

	# THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

	# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine
	# This is how I upload my new Sol Trader builds (http://soltrader.net)
	# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash

	S3KEY="my aws key"
	S3SECRET="my aws secret" # pass these in

	function putS3
	{
	path=$1