Gaurav Verma gauravve

If you use Amazon AWS for nearly anything, then you are probably familiar with KMS, the Amazon Key Management Service.

KMS is a service which allows API-level access to cryptographic primitives without the expense and complexity of a full-fledged HSM or CloudHSM implementation. There are trade-offs in that the key material does reside on servers rather than tamper-proof devices, but these risks should be acceptable to a wide range of customers based on the care Amazon has put into the product. You should perform your own diligence on whether KMS is appropriate for your environment. If the security profile is not adequate, you should consider a stronger product such as CloudHSM or managing your own HSM solutions.

The goal here is to provide some introductory code on how to perform envelope encrypt a message using the AWS KMS API.

KMS allows you to encrypt messages of up to 4kb in size directly using the encrypt()/decrypt() API. To exceed these limitations, you must use a technique called "envelope encryptio

boto3 quick hands-on

This documentation aims at being a quick-straight-to-the-point-hands-on AWS resources manipulation with [boto3][0].

First of all, you'll need to install [boto3][0]. Installing it along with [awscli][1] is probably a good idea as

[awscli][1] is boto-based
[awscli][1] usage is really close to boto's

Redis widget for Dashing

Description

Redis dashing widget to display the number of connected clients to a redis server, as well as the instance memory usage.

Dependencies

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	#!/bin/bash

	# Check out the blog post at:
	#
	# http://www.philipotoole.com/influxdb-and-grafana-howto
	#
	# for full details on how to use this script.

	AWS_EC2_HOSTNAME_URL=http://169.254.169.254/latest/meta-data/public-hostname
	INFLUXDB_DATABASE=test1

	---
	# This has been tested with ansible 1.3 with these commands:
	# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=false"
	# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=true"
	# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts"
	# NB: The type of the variable is crucial!

	- name: Ansible Conditionals Examples
	hosts: $hosts
	vars_files: