Yaniv Kessler kessler

Introduction

The computer driven markets for instruments like stocks and exchange traded stock options, have transformed finance and the flow of capital. These markets are enabled by order matching engines (and the infrastructure that supports this software). Before computer trading networks and matching engines, stocks where traded on cavernous exchange floors and transaction costs where high. When electronic trading fully matured, floor traders were a fading anachronism and transaction costs had been reduced to pennies a share in many cases. Electronic trading could not exist without advanced network infrastructure, but without the software matching engines no shares would change hands. The computer trading networks, the matching engine software has also created a concentrated nexus of potential failure. Failures in these systems have increased as the frequency and volume on the electronic networks has increased. The position of order matching engines in the trading infrastructure makes these systems o

You have to do 2 things in order to allow your container to access your host's postgresql database

Make your postgresql listen to an external ip address
Let this client ip (your docker container) access your postgresql database with a given user

Obs: By "Host" here I mean "the server where docker is running on".

Make your postgresql listen to an external ip address

Find your postgresql.conf (in case you don't know where it is)

$ sudo find / -type f -name postgresql.conf

What / Why

Deploy key is a SSH key set in your repo to grant client read-only (as well as r/w, if you want) access to your repo.

As the name says, its primary function is to be used in the deploy process in replace of username/password, where only read access is needed. Therefore keep the repo safe from the attack, in case the server side is fallen.

How to

Generate a ssh key

JankyBrowser

The only cross-platform browser that fits in a Gist!

One line install. Works on Linux, MacOSX and Windows.

Local Install

$&gt; npm install http://gist.github.com/morganrallen/f07f59802884bcdcad4a/download

	/**
	* Encrypts plaintext using AES-GCM with supplied password, for decryption with aesGcmDecrypt().
	* (c) Chris Veness MIT Licence
	*
	* @param {String} plaintext - Plaintext to be encrypted.
	* @param {String} password - Password to use to encrypt plaintext.
	* @returns {String} Encrypted ciphertext.
	*
	* @example
	* const ciphertext = await aesGcmEncrypt('my secret text', 'pw');

	# Tested on OSX Yosemite 10.10.4
	# there is also an updated version (work in progress) for El Capitan here https://gist.github.com/guycalledseven/31ffe35eca056838b06b

	# XXX TODO
	# should I disable com.google.Keystone.Agent ??
	# http://applehelpwriter.com/2014/07/13/how-to-remove-googles-secret-update-software-from-your-mac/


	# Stop DS_Store file creation on network connections
	# restart Finder afterwards

	'use strict';

	module.exports = function CustomError(message, extra) {
	Error.captureStackTrace(this, this.constructor);
	this.name = this.constructor.name;
	this.message = message;
	this.extra = extra;
	};

	CustomError.prototype = Object.create(Error.prototype);

	# OSX for Hackers (Mavericks/Yosemite)
	#
	# Source: https://gist.github.com/brandonb927/3195465

	#!/bin/sh

	# Some things taken from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Ask for the administrator password upfront

	echo "downloading scripts"
	curl https://gist.githubusercontent.com/kessler/6122814/raw/002f1f919b937fd067a36f1a3b47050e4a3645e4/linux%20net%20settings > netchakra.sh
	chomd +x netchakra.sh

	curl https://gist.githubusercontent.com/kessler/5885063/raw/38f201ff740b25782bc04d3af11b4f3823478b4d/install-node > install-node.sh
	chmod +x install-node.sh

	curl https://gist.githubusercontent.com/kessler/6412374/raw/7b088bbeaf36ac845a6c2b6950d0e9f4d8d2d6b8/install-zeromq > install-zmq.sh
	chmod +x install-zmq.sh

	var count = 0
	var countWithDelay = 0

	function recurse() {
	console.log('recurse: %d', count)

	if (count++ === 100) return

	setImmediate(recurse)
	}