Ahmed viztastic

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

On Mac OS (host):

Shutdown your VM and do:

VirtualBox > Settings > Network > Add (you will get vboxnet0)

On a terminal ifconfig will show you new interface vboxnet0

VM's Settings > System > check "Enable I/O APIC." VM's Settings > Network > Adapter 2 > host-only vboxnet0

Multitenancy refers to a principle in software architecture where a single instance of the software runs on a server, serving multiple client-organizations (tenants)

Let's start by enumerating some multi tenant applications and understand how they handle it.

Slack

Authentication:

bcrypt: A bcrypt library for NodeJS.
pg: PostgreSQL client - pure javascript & libpq with the same API
q: A library for promises (CommonJS/Promises/A,B,D)
node-uuid: Rigorous implementation of RFC4122 (v1 and v4) UUIDs.
optimist: Light-weight option parsing with an argv hash. No optstrings attached.
aws-sdk: AWS SDK for JavaScript
validator: String validation and sanitization
cheerio: Tiny, fast, and elegant implementation of core jQuery designed specifically for the server
knox: Amazon S3 client
consolidate: Template engine consolidation library

Notice

This script is no longer required with Docker for Mac which includes an option to run Docker at startup and doesn't use docker-machine to administer the local Docker engine.

Requirements

Docker Machine + Docker
curl
A Virtualbox-driven Docker Machine called "default" docker-machine create --driver virtualbox default (this is the default with Docker toolkit).

	#
	# This config file is a combination of ideas from:
	# http://www.37signals.com/svn/posts/1073-nuts-bolts-haproxy
	# http://www.igvita.com/2008/05/13/load-balancing-qos-with-haproxy/
	# http://wiki.railsmachine.com/HAProxy
	# http://elwoodicious.com/2008/07/15/nginx-haproxy-thin-fastcgi-php5-load-balanced-rails-with-php-support/
	# http://upstream-berlin.com/2008/01/09/using-haproxy-with-multiple-backends-aka-content-switching/
	# http://wiki.railsmachine.com/HAProxy
	# http://gist.github.com/raw/25482/d39fb332edf977602c183194a1cf5e9a0b5264f9
	#

	var express = require('express');
	var mongoose = require('mongoose');

	var dbs = {};
	for (var i = 0; i < 40; i++) {
	dbs['t' + i] = mongoose.createConnection('mongodb://localhost/t' + i + '__multitenant', { server: { poolSize: 5 } });
	}

	var app = express();

	var dbs = db.getMongo().getDBNames();
	for (var i in dbs) {
	db = db.getMongo().getDB( dbs[i] );
	if (db.getName().indexOf('multitenant') > -1) {
	print('dropping db ' + db.getName());
	db.dropDatabase();
	}
	}

	<!doctype html>
	<html ng-app="Demo">
	<head>
	<meta charset="utf-8" />

	<title>
	Animating A Single Item Using ngRepeat And ngAnimate In AngularJS
	</title>

	<link rel="stylesheet" type="text/css" href="./demo.css"></link>

	(function () {
	"use strict";

	var _theme;

	angular
	.module('mdColors',['mdColors'])

	.config(['$mdThemingProvider', function($mdThemingProvider){
	_theme = $mdThemingProvider.theme();