Bob Wei bobwei

Amazon EBS - How to Grow the Storage

Seen loads of good posts about EBS describing how to use them to provide cross instance persistent storage. Really it's awesome. All the EC2 images store to their own EBS and if the EC2 crashes a new one can be resumed with minimal downtime. Amazon has nice pictures about this use case.

Quite simple to increase the size of an EBS volume, just: create, attach, mount, write, umount, snapshot, create, attach, check, resize, check, mount, delete. We're going to walk through the process using Amazon EC2 command line tools.

Create the initial volume and attach to an EC2 instance.

Quick virtualenv fix on Mountain Lion

Overview

It appears that Apple somehow broke Python in Mountain Lion, so even with the latest Command Line Tools and Xcode 4.4 virtualenv won't properly work. During virtual environment creation it will try to install easy_install inside /Library hierarchy. So let's give it a quick workaround. Let's install custom python into your $HOME-directory using pythonbrew!

Installing proper Command Line Tools

Without the Apple Mac Developer account you won't even see the proper download link for the latest CL Tools and the old one won't work on ML. So here's the link: http://goo.gl/iBTXh. It points towards the Apple website so don't worry.

	virtualenv --no-site-packages .
	source bin/activate
	bin/pip install Django psycopg2 django-sentry
	bin/pip freeze > requirements.txt
	bin/django-admin.py startproject mysite
	cat >.gitignore <<EOF
	bin/
	include/
	lib/
	EOF

	/*
	array implementation of a binary heap, example usage:

	// can optionally provide a comparison function, a function for a max
	// heap is the default if no comparison function is provided
	var bh = binaryHeap();
	bh.push(5);
	bh.push(34);
	bh.push(16);
	var max = bh.pop(); // 34

	import logging

	from tastypie.authentication import Authentication

	import oauth2
	from oauth_provider.consts import OAUTH_PARAMETERS_NAMES
	from oauth_provider.store import store
	from oauth_provider.store import Error as OAuthError
	from oauth_provider.utils import get_oauth_request
	from oauth_provider.utils import get_oauth_server

	#!/usr/bin/env python
	#
	# Copyright 2010 Facebook
	#
	# Licensed under the Apache License, Version 2.0 (the "License"); you may
	# not use this file except in compliance with the License. You may obtain
	# a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#

	// setup
	- (void)viewDidLoad
	{
	...
	self.locationManager = [[CLLocationManager alloc] init];
	locationManager.delegate = self;
	locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
	locationManager.distanceFilter = 250;
	self.desiredLocationFreshness = 15.0; // desired freshness in s
	self.desiredLocationAccuracy = 100.0; // desired location accuracy in m

	/* Copyright (c) 2012 Sven "FuzzYspo0N" Bergström

	http://underscorediscovery.com

	MIT Licensed. See LICENSE for full license.

	Usage : node simplest.app.js
	*/

	var

	<!doctype html>

	<!-- http://taylor.fausak.me/2015/01/27/ios-8-web-apps/ -->

	<html>
	<head>
	<title>iOS 8 web app</title>

	<!-- CONFIGURATION -->

	from boto.utils import parse_ts
	from django.core.files.storage import get_storage_class
	from storages.backends.s3boto import S3BotoStorage

	"""
	make sure you have this setting
	AWS_PRELOAD_METADATA = True
	and that you have python-dateutils==1.5 installed
	"""