JamieMason

Group Array of JavaScript Objects by Key or Property Value

Implementation

const groupBy = key => array =>
  array.reduce((objectsByKeyValue, obj) => {
    const value = obj[key];
    objectsByKeyValue[value] = (objectsByKeyValue[value] || []).concat(obj);
    return objectsByKeyValue;

LoganDark

// This is JXA, i.e. you can't run it with plain `node`. Use `osascript` or the Script Editor.
// I recommend exporting it to an `.app` and running it at login if you have my same issue.
// Requires this script: https://gist.github.com/LoganDark/b8c74e14c06b77e6f16d4492c5bda928

// CONFIGURE crashPercentScript in run() to point to your script. Make sure to chmod +x to make
// it executable.

function getCrashPercent(app, script) {
	return +/\d+/.exec(app.doShellScript(script).split('\r')[0])[0]
}

sitkevij

Hello Minikube Mac Install

install brew

$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew

kikitux

numnodes=2
baseip="192.168.10"

#global script
$global = <<SCRIPT

#check for private key for vm-vm comm
[ -f /vagrant/id_rsa ] || {
  ssh-keygen -t rsa -f /vagrant/id_rsa -q -N ''
}

subfuzion

Installing with apt-get

#!/bin/sh
# https://docs.docker.com/engine/installation/linux/ubuntu/#install-using-the-repository
sudo apt-get update && sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88 | grep [email protected] || exit 1
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update

patrickhuber

install kubernetes 1.6 on centos 7.3

Install kubelet, kubeadm, docker, kubectl and kubernetes-cni

1. Install Yum Repo

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://yum.kubernetes.io/repos/kubernetes-el7-x86_64

ptarjan

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

owainlewis

How to setup docker behing a HTTP proxy

mkdir /etc/systemd/system/docker.service.d

sudo touch /etc/systemd/system/docker.service.d/http-proxy.conf

Add proxy info

jonathan-kosgei

I have been an aggressive Kubernetes evangelist over the last few years. It has been the hammer with which I have approached almost all my deployments, and the one tool I have mentioned (shoved down clients throats) in almost all my foremost communications with clients, and it was my go to choice when I was mocking my first startup (saharacluster.com).

A few weeks ago Docker 1.13 was released and I was tasked with replicating a client's Kubernetes deployment on Swarm, more specifically testing running compose on Swarm.

And it was a dream!

All our apps were already dockerised and all I had to do was make a few modificatons to an existing compose file that I had used for testing before prior said deployment on Kubernetes.

And, with the ease with which I was able to expose our endpoints, manage volumes, handle networking, deploy and tear down the setup. I in all honesty see no reason to not use Swarm. No mission-critical feature, or incredibly convenient really nice to have feature in Kubernetes that I'm go

ipedrazas

## Useful Commands

Get kubectl version

    kubectl version

Get cluster info: