olpia

I've been playing with jq, and I've been having a hard time finding examples of how it works with output from a service like AWS (which I use a lot).

Here is one I use a lot with vagrant-ec2.

When we're launching and killing a lot of instances, the AWS API is the only way to track down which instances are live, ready, dead, etc.

To find instances that are tagged with e.g. {"Key" = "Name", "Value" = "Web-00'} in the middle of a vagrant dev cycle, or a prod launch/replace cycle, you can do something like this:

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

HOWTO Install AWS CLI on Debian

1. installing pre-reqs

sudo apt-get install python python-pip

2. installing the cli:

sudo pip install awscli

3. configuring the cli:

aws configure

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

	#!/usr/bin/env python
	#
	# Copyright (C) 2015 Alexander Taler
	#
	# This is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.
	#
	# This is distributed in the hope that it will be useful,

	Interval 10
	CheckThresholds true

	LoadPlugin syslog
	LoadPlugin cpu
	LoadPlugin df
	LoadPlugin interface
	LoadPlugin load
	LoadPlugin memory
	LoadPlugin processes

	;; SCENARIO: Be able to detect high heap pressure on service.
	;; -> If during the last x minutes, "heap.usage" values are > 0.70, then alert...
	;; Riemann API http://riemann.io/api.html

	(defn slack-this-shit [message]
	(slack slack-alert-channel {:username "Not so friendly Riemann bot",
	:formatter (fn [ev] {:text (str ""(:service ev)"" " is in " (:state ev) " state on hosts: " (:host ev) ". " message),
	:icon ":x:"})}))

	(def tracking-jvm-pressure-stream

	# Set variables in .bashrc file

	# don't forget to change your path correctly!

	export GOPATH=$HOME/golang
	export GOROOT=/usr/local/opt/go/libexec
	export PATH=$PATH:$GOPATH/bin
	export PATH=$PATH:$GOROOT/bin

	#!/bin/bash
	#####################################################
	# Name: Bash CheatSheet for Mac OSX
	#
	# A little overlook of the Bash basics
	#
	# Usage:
	#
	# Author: J. Le Coupanec
	# Date: 2014/11/04

	#!/usr/bin/env bash
	#
	# Get the value of a tag for a running EC2 instance.
	#
	# This can be useful within bootstrapping scripts ("user-data").
	#
	# Note the EC3 instance needs to have an IAM role that lets it read tags. The policy
	# JSON for this looks like:
	#
	# {