alisdair

#!/bin/bash

# Generate a `:something-intensifies:` Slack emoji, given a reasonable image
# input. I recommend grabbing an emoji from https://emojipedia.org/

set -euo pipefail

# Number of frames of shaking
count=10
# Max pixels to move while shaking

lizthegrey

default['sshd']['sshd_config']['AuthenticationMethods'] = 'publickey,keyboard-interactive:pam'
default['sshd']['sshd_config']['ChallengeResponseAuthentication'] = 'yes'
default['sshd']['sshd_config']['PasswordAuthentication'] = 'no'

claudiok

Consumer-grade GPUs in an OpenStack system (NVIDIA GPUs)

Assumptions

This assumes you have GTX980 cards in your system (PCI id 10de:13c0 & 10de:0fbb per card). Just add more IDs for other cards in order to make this more generic. This also assumes nova uses qemu-kvm as the virtualization hypervisor (qemu-system-x86_64). This seems to be the default on OpenStack Newton when installed using openstack-ansible.

We assume OpenStack Newton is pre-installed and that we are working on a Nova compute node. This has been tested on an Ubuntu 16.04 system where I installed OpenStack AIO version 14.0.0 (different from the git tag used in the instructions!): http://docs.openstack.org/developer/openstack-ansible/developer-docs/quickstart-aio.html

Prepare the system for GPU passthrough (set up IOMMU/vfio/...)

Note: This is heavily based on information from https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Enabling_IOMMU adapted for Ubuntu 16.04

calerogers

<domain type='kvm'>
  <name>ubuntu-4b</name>
  <uuid>7dfbcb8a-77da-11e6-a116-408d5cb4b9e6</uuid>
  <memory unit='KiB'>12582912</memory>
  <currentMemory unit='KiB'>12582912</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-q35-2.5'>hvm</type>
    <loader readonly='no' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>
    <nvram>/var/lib/libvirt/qemu/nvram/ubuntu-4b_VARS.fd</nvram>

dvirsky

Creating a redis Module in 15 lines of code!

A quick guide to write a very very simple "ECHO" style module to redis and load it. It's not really useful of course, but the idea is to illustrate how little boilerplate it takes.

Step 1: open your favorite editor and write/paste the following code in a file called module.c

#include "redismodule.h"
/* ECHO <string> - Echo back a string sent from the client */
int EchoCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {

turtlemonvh

a.myhost.com {
  tls off
  root /var/www/
  proxy / localhost:8091
  log log/access.a.log
}

b.myhost.com {
  tls off
  root /var/www/

warmfusion

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 ;)

shamasis

/**
 * @module describe-it
 *
 * This module defines global variables to provide unit test case runner functions compatible with mocha and jasmine.
 * The codebase is written for brevity and facilitate being as lightweight as possible.
 *
 * The code is intended to be included in Postman Test Sandbox.
 */

/**

jasonbrooks

The kubernetes ansible/vagrant install method can be used with the libvirt, virtualbox or openstack providers. The Vagrantfile requires that vagrant-openstack-provider be installed whether you're using it or not, so install it:

$ vagrant plugin install vagrant-openstack-provider

Alternatively, you can skip the second step above, but you'll need to comment out the require 'vagrant-openstack-provider' line in the Vagrantfile.

$ git clone https://github.com/jasonbrooks/contrib.git

olov

// You don't want to serve HTTPS supporting for SSL3.0 any longer, see:
// http://googleonlinesecurity.blogspot.de/2014/10/this-poodle-bites-exploiting-ssl-30.html
import (
	"crypto/tls"
	"net/http"
)

// This code supports SSL3.0, TLS1.0, TLS1.1 and TLS1.2
// Chances are you currently do this but want to stop due to the POODLE
err := http.ListenAndServeTLS(addr, "crtfile", "keyfile", handler)