Rafael rafaelfess

TLS secured TCP exposed Docker daemon on Dokku host - setup

Create certificates
Edit Docker options
Restart Docker
Copy client certificates from host
(optional) Add remote endpoint in Portainer

Tested on a standard $5/mo DigitalOcean VPS running Ubuntu 16.04.

Hello  (<-- two spaces)
World

Hello
World

General

Offical learning resources

Elixir School

Books

foundational

Thomas. 2018. Programming Elixir
McCord, Tate, Valim. 2019. Programming Phoenix

Falsehoods programmers believe about prices

You can store a price in a floating point variable.
All currencies are subdivided in 1/100th units (like US dollar/cents, euro/eurocents etc.).
All currencies are subdivided in decimal units (like dinar/fils)
All currencies currently in circulation are subdivided in decimal units. (to exclude shillings, pennies) (counter-example: MGA)
All currencies are subdivided. (counter-examples: KRW, COP, JPY... Or subdivisions can be deprecated.)
Prices can't have more precision than the smaller sub-unit of the currency. (e.g. gas prices)
For any currency you can have a price of 1. (ZWL)
Every country has its own currency. (EUR is the best example, but also Franc CFA, etc.)

Elixir installation guide

Version numbers should be the ones you want. Here I do it with the last ones available at the moment of writing.

The simplest way to install elixir is using your package manager. Sadly, at the time of writing only Fedora shows the intention to keep its packages up to date. There you can simply sudo dnf install erlang elixir and you are good to go.

Anyway, if you intend to work with several versions of erlang or elixir at the same time, or you are tied to a specific version, you will need to compile it yourself. Then kerl and exenv are your best friends.

Secured HLS setup with Nginx as media server

This example is part of this article.

This is an example for an HLS delivery with basic security. Nginx compiled with nginx-rtmp-module & secure-link is used as media server. Features:

Domain filtering
Referrer filtering
Embed buster

WSL install another distro

Here are some default vars for the process

ISO_DIR=~/fedora;
ROOTFS_MOUNT_DIR=/mnt/contents

DISTRO_LOCATION=

	Author: Nilo Dantas - n1lo
	Based on: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/518056 - helio-valente post

	How to use Cedilha on US Keyboard on ArchLinux

	1) Put: English(US, internacional with dead Keys) on your system keyboard layout.

	2) Editing the files:

	sudo vim /usr/lib/gtk-3.0/3.0.0/immodules.cache

	user web;

	# One worker process per CPU core.
	worker_processes 8;

	# Also set
	# /etc/security/limits.conf
	# web soft nofile 65535
	# web hard nofile 65535
	# /etc/default/nginx

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048