Oscar oscargicast

Using Dnsmasq with Ubuntu for VM web application testing

When running virtual machines under a Linux host system for testing web apps in various browsers (e.g. Internet Explorer), I found it rather tedious having to continually tweak the hosts file within each VM for the purpose of adding entries pointing back to the host machine's development web server address.

Instead the steps below will setup Dnsmasq on a Ubuntu 16.04LTS, 14.04LTS or 12.04LTS host machine for the purpose of serving both it's own DNS queries and that of virtual machine guests. Dnsmasq will parse the /etc/hosts file on your host machine where we will keep a single set of DNS entires to our test web application(s).

Method 1
- Ubuntu 16.04LTS / 14.04LTS
- Ubuntu 12.04LTS
Method 2
- Stop NetworkManager running it's own Dnsmasq

How do I round to 2 decimals?

In python, you have floats and decimals that can be rounded. If you care about the accuracy of rounding, use decimal type. If you use floats, you will have issues with accuracy.

All the examples use demical types, except for the original value, which is automatically casted as a float.

To set the context of what we are working with, let's start with an original value.

Original Value

This document has now been incorporated into the uWSGI documentation:

http://uwsgi-docs.readthedocs.org/en/latest/tutorials/Django_and_nginx.html

Set up Django, nginx and uwsgi

Steps with explanations to set up a server using:

	import sys

	salesTotal = 0
	oldKey = None

	for line in sys.stdin:
	data = line.strip().split("\t")
	if len(data) != 2:
	# Something has gone wrong. Skip this line.
	continue

	#!/bin/bash

	NAME="hello_app" # Name of the application
	DJANGODIR=/webapps/hello_django/hello # Django project directory
	SOCKFILE=/webapps/hello_django/run/gunicorn.sock # we will communicte using this unix socket
	USER=michal # the user to run as
	GROUP=michal # the group to run as
	NUM_WORKERS=3 # how many worker processes should Gunicorn spawn
	DJANGO_SETTINGS_MODULE=hello.settings # which settings file should Django use
	DJANGO_WSGI_MODULE=hello.wsgi # WSGI module name

	import os
	localDir = os.path.dirname(__file__)
	absDir = os.path.join(os.getcwd(), localDir)

	import cherrypy

	class FileDemo(object):

	def index(self, myFile=None, derp_cv=None, **kwargs):
	if cherrypy.request.method == "POST":

	#!/bin/bash

	NAME="hello_app" # Name of the application
	DJANGODIR=/webapps/hello_django/hello # Django project directory
	SOCKFILE=/webapps/hello_django/run/gunicorn.sock # we will communicte using this unix socket
	USER=hello # the user to run as
	GROUP=webapps # the group to run as
	NUM_WORKERS=3 # how many worker processes should Gunicorn spawn
	DJANGO_SETTINGS_MODULE=hello.settings # which settings file should Django use
	DJANGO_WSGI_MODULE=hello.wsgi # WSGI module name

	import json
	import tornado.web


	class JsonHandler(BaseHandler):
	"""Request handler where requests and responses speak JSON."""
	def prepare(self):
	# Incorporate request JSON into arguments dictionary.
	if self.request.body:
	try:

	# Updated by Siege 2.72, July-07-2012
	# Copyright 2000-2007 by Jeffrey Fulmer, et al.
	#
	# Siege configuration file -- edit as necessary
	# For more information about configuring and running
	# this program, visit: http://www.joedog.org/

	#
	# Variable declarations. You can set variables here
	# for use in the directives below. Example: