David Wittman DavidWittman

A Brief Introduction to Fabric

Fabric is a deployment management framework written in Python which makes remotely managing multiple servers incredibly easy. If you've ever had to issue a change to a group servers, this should look pretty familiar:

for s in $(cat servers.txt); do ssh $s service httpd graceful; done

Fabric improves on this process by providing a suite of functions to run commands on the servers, as well as a number of other features which just aren't possible in a simple for loop. While a working knowledge of Python is helpful when using Fabric, it certainly isn't necessary. This tutorial will cover the steps necessary to get started with the framework and introduce how it can be used to improve on administering groups of servers.

	function mixInto(object, mixIn) {
	forEachIn(mixIn, function(name, value) {
	object[name] = value;
	});
	};

	// ==UserScript==
	// @name YouTube Couch Mode
	// @author David Wittman <[email protected]>
	// @namespace nowhere
	// @description Adds a full-screen "Couch Mode" button to YouTube
	// @include http://www.youtube.com/watch?*
	// ==/UserScript==


	// iframe detection

	# hubot

	description "Hubot Campfire bot"
	author "David Wittman <[email protected]>"

	start on filesystem or runlevel [2345]
	stop on runlevel [!2345]

	# Path to Hubot installation
	env HUBOT_DIR='/opt/hubot/'

	set t_Co=256
	colors molokai

	syntax on
	autocmd BufRead *.py set smartindent cinwords=if,elif,else,for,while,try,except,finally,def,class
	set tabstop=4
	set shiftwidth=4
	set smarttab
	set expandtab
	set softtabstop=4

	# %(mysite)s - run %(mysite)s instances (default is the prod instance)
	#
	# This runs gunicorn-django for %(mysite)s; to install:
	# * sudo ln -s <this file> /etc/init/%(mysite)s
	# * sudo initctl reload-configuration
	#
	# it expects the following directory layout:
	#
	# /home/%(mysite)s/public_html
	# \-env -> virtualenv

	#!/usr/bin/env python
	"""
	MS12-020/CVE-2012-0002 Vulnerability Tester
	based on sleepya's version @ http://pastebin.com/Ks2PhKb4
	"""

	import socket
	import struct
	import sys

	description = [[
	Issues an arbitrary HTTP GET request
	]]

	---
	-- @usage
	-- nmap --script http-get [--script-args http-get.path=/status] -p <port> <host>
	-- @args http-get.path The path to request (defaults to /)
	-- http-get.match String to match in the HTTP response (incl. headers)
	-- @output

	# boot
	# openstack-compute/nova wrapper for building Cloud Servers
	# usage: boot <image> <flavor> <name>
	function boot() {
	# API Credentials
	local USERNAME=${OPENSTACK_COMPUTE_USERNAME-"username"}
	local APIKEY=${OPENSTACK_COMPUTE_APIKEY-"8b843e51cecdae209efd541b6dd52c04"}

	# Boot specifics
	local FLAVOR=3

	backend default {
	.host = "127.0.0.1";
	.port = "8080";
	}
	backend master {
	.host = "10.x.x.x";
	.port = "80";
	}
	sub vcl_recv {
	# Any uploads or restarts should go to the master backend