jespada jespada

This is unmaintained, please visit Ben-PH/spacemacs-cheatsheet

Useful Spacemacs commands

SPC q q - quit
SPC w / - split window vertically
SPC w - - split window horizontally
SPC 1 - switch to window 1
SPC 2 - switch to window 2
SPC w c - delete current window

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

emacs --daemon to run in the background. emacsclient.emacs24 <filename/dirname> to open in terminal

NOTE: "M-m and SPC can be used interchangeably".

Undo - C-/
Redo - C-?
Change case: 1. Camel Case : M-c 2. Upper Case : M-u

Lower Case : M-l

High availability monitoring with Sensu

sensu | May 8, 2013

Redundancy. Availability. Scalability. Should sound familiar to you if you work in the web. Every system I build has to fit those 3 main criterias. I would also throw in manageability. If I can’t use Chef with it, I’m probably trying to use the wrong tool for the job.

There’s always been one exception though: my monitoring tool. Nagios. Zabbix. Zenoss. Shinken. Used them all. Each of them have shortcomings when it comes to the four criterias listed above. Different ones for each.

So, that said, a few months back, I was searching for something fresh. Something I could easily manage with Chef. Because I tend to forget things, and I wanted to automate as much as possible our monitoring solution. Don’t get me wrong, there’s nothing as good as developers to monitor your stuff, but I tend to like to know there’s something wrong before they show up at my desk. Even if it’s only 1-2 minutes ;)

With Docker 1.8.0 shipped new log-driver for GELF via UDP, this means that the logs from Docker Container(s) can be shipped directly to the ELK stack for further analysis.
This tutorial will illustrate how to use the GELF log-driver with Docker engine.
Step 1: Setup ELK Stack:
- docker run -d --name es elasticsearch
- docker run -d --name logstash --link es:elasticsearch logstash -v /tmp/logstash.conf:/config-dir/logstash.conf logstash logstash -f /config-dir/logstash.conf
- Note the config for Logstash can be found at this link
- docker run --link es:elasticsearch -d kibana
Once the ELK stack is up now let's fire up our nginx container which ships its logs to ELK stack.

LOGSTASH_ADDRESS=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' logstash)
`docker run -d --net=host --log-driver=gelf --log-opt gelf-address=u

Questions about Distributed systems by @tsantero.

explain the life of an http request.
what does the FLP result teach us?
what is a byzantine failure?
explain CRDTs
explain linearizability.
how does DNS work?
crash-stop vs crash-recovery?
difference between soft and hard real time

	version: 0.0
	os: linux
	files:
	- source: /
	destination: /home/ec2-user/node
	permissions:
	- object: /home/ec2-user
	owner: ec2-user
	group: ec2-user
	type:

	FROM codeship/ruby

	MAINTAINER Dave Mox <[email protected]>

	RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
	git \
	vim

	COPY Makefile /src/

	package main

	import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
	)

	func main() {

	#!groovy
	# Best of Jenkinsfile
	# `Jenkinsfile` is a groovy script DSL for defining CI/CD workflows for Jenkins
	node {
	}