squidpickles

Multiplatform (amd64 and arm) Kubernetes cluster setup

The official guide for setting up Kubernetes using kubeadm works well for clusters of one architecture. But, the main problem that crops up is the kube-proxy image defaults to the architecture of the master node (where kubeadm was run in the first place).

This causes issues when arm nodes join the cluster, as they will try to execute the amd64 version of kube-proxy, and will fail.

It turns out that the pod running kube-proxy is configured using a DaemonSet. With a small edit to the configuration, it's possible to create multiple DaemonSets—one for each architecture.

Steps

Follow the instructions at https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ for setting up the master node. I've been using Weave Net as the network plugin; it see

ssplatt

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  creationTimestamp: null
  generation: 1
  labels:
    k8s-app: kube-proxy-amd64
  name: kube-proxy-amd64
  selfLink: /apis/extensions/v1beta1/namespaces/kube-system/daemonsets/kube-proxy-amd64
  namespace: kube-system

aaronhoffman

#!/bin/sh
# prevent commit to local master branch

branch=`git symbolic-ref HEAD`
if [ "$branch" = "refs/heads/master" ]; then
    echo "pre-commit hook: Can not commit to the local master branch."
    exit 1
fi

exit 0

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

samundra

#!/bin/bash
# Play and download the youtube video simultaneously
# Author: Samunddra
# Update Date: 2016-12-14 16:29:14 PM
# 
# Use `screen` to play it in the background, fork screen process and exit, enjoy
#
# DEPENDENCIES
#   - sudo apt install -y jq mplayer youtube-dl
#

wojteklu

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

---

General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

leonardofed

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

LeCoupa

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

kwk

#!/bin/bash

JQPATH=$(which jq)
if [ "x$JQPATH" == "x" ]; then
  echo "Couldn't find jq executable." 1>&2
  exit 2
fi

set -eu
shopt -s nullglob

vivien

#!/bin/sh
# Copyright 2014 Vivien Didelot <[email protected]>
# Licensed under the terms of the GNU GPL v3, or any later version.

NICK=irccat42
SERVER=irc.freenode.net
PORT=6667
CHAN="#irccat"

{