Amos Shapira amosshapira

Installation of Minikube with kvm2 driver which really works!

Disclaimer: Tried on Ubuntu 18.04 LTS

Installation of minikube

Apparently installation from snap doesn't work as expected, use curl for installation of the latest version.
curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64n /usr/local/bin/minikube

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

Exporting your 2FA tokens from Authy to transfer them into another 2FA application

IMPORTANT - Update regarding deprecation of Authy desktop apps

Past August 2024, Authy stopped supported the desktop version of their apps:
See Authy is shutting down its desktop app | The 2FA app Authy will only be available on Android and iOS starting in August for details.

And indeed, after a while, Authy changed something in their backend which now prevents the old desktop app from logging in. If you are already logged in, then you are in luck, and you can follow the instructions below to export your tokens.

If you are not logged in anymore, but can find a backup of the necessary files, then restore those files, and re-install Authy 2.2.3 following the instructions below, and it should work as expected.

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

Adventures in Python Core Dumping

After watching Bryan Cantrill's presentation on [Running Aground: Debugging Docker in Production][aground] I got all excited (and strangely nostalgic) about the possibility of core-dumping server-side Python apps whenever they go awry. This would theoretically allow me to fully inspect the state of the program at the point it exploded, rather than relying solely on the information of a stack trace.

	# If you, like me, have all of your various source-code-like projects in ~/src/
	# this is how to give yourself per-project shell history.
	#
	# I wish I'd done this years ago.
	#
	# First, in your .bashrc file, you redefine the cd, pushd and popd builtins to be "do the builtin bit,
	# then do one other thing (set_src_history.sh, below) like so:


	cd () {

	set hostnames to {"web01", "sys01", "mem01", "redis01"}

	if application "iTerm" is running then
	tell application "iTerm"
	create window with default profile
	tell current tab of current window
	select
	tell current session

	-- make the window fullscreen

	$EC2SettingsFile="C:\\Program Files\\Amazon\\Ec2ConfigService\\Settings\\BundleConfig.xml"
	$xml = [xml](get-content $EC2SettingsFile)
	$xmlElement = $xml.get_DocumentElement()

	foreach ($element in $xmlElement.Property)
	{
	if ($element.Name -eq "AutoSysprep")
	{
	$element.Value="Yes"
	}

	#!/bin/bash
	#
	# Pivot the root partition to a tmpfs mount point so that the root volume can
	# be re-partitioned.
	#
	##############################################################################
	set -x
	set -e

	# Prevent selinux from interfering

	require 'gsl'
	require 'time'

	module Diskalerter
	class ThresholdEstimator
	attr_reader :timestamps, :signal, :threshold, :now

	# timestamps - a list of timestamps in epoch milliseconds
	# signal - a list of values for the provided timestamps
	# threshold - the "exhaustion" threshold (e.g., 100 for a percentage signal)