Luk Rizal lukrizal

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macOS 10.15 Catalina Mostly-Automated Setup

An easy to refer to document for regularly setting up macOS 10.15 Catalina.

Controversy

The topic of recipe-based frequent fresh reinstalls of macOS is a controversial issue. Some people are against reinstalling macOS, citing that they have never had an issue with Apple provided upgrade installs.

MongoDB AWS EC2 Setup Guide

You can see my latest update in my blog here https://medium.com/@calvin.hsieh/steps-to-install-mongodb-on-aws-ec2-instance-62db66981218

Credits:

Big thanks to Elad Nava and Shane Rainville for writing the above articles that allow me to conduct this guide. If by all means that I violated original post's copyright, please contact me.

Monitoring of Docker containers with systemd

Service

create service file /etc/systemd/system/docker_redis.service

[Unit]

	#!/usr/bin/env bash

	# install docker
	# https://docs.docker.com/engine/installation/linux/ubuntulinux/

	# install docker-compose
	# https://docs.docker.com/compose/install/

	# install letsencrypt
	# https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04

	# maximum capability of system
	user@ubuntu:~$ cat /proc/sys/fs/file-max
	708444

	# available limit
	user@ubuntu:~$ ulimit -n
	1024

	# To increase the available limit to say 200000
	user@ubuntu:~$ sudo vim /etc/sysctl.conf

	#!/bin/bash

	# this folder needs to exist
	mkdir ~/certs

	# authenticate yourself (requires that nothing runs on ports 443 and 80)
	docker run --rm -it -v ~/certs:/etc/letsencrypt -p 443:443 certbot/certbot certonly --authenticator standalone

	# renewal
	docker run --rm -it -v ~/certs:/etc/letsencrypt certbot/certbot renew

	'use strict';

	const crypto = require('crypto');

	const ENCRYPTION_KEY = process.env.ENCRYPTION_KEY; // Must be 256 bits (32 characters)
	const IV_LENGTH = 16; // For AES, this is always 16

	function encrypt(text) {
	let iv = crypto.randomBytes(IV_LENGTH);
	let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(ENCRYPTION_KEY), iv);

	FROM php:7.0.4-fpm

	RUN apt-get update && apt-get install -y libmcrypt-dev \
	mysql-client libmagickwand-dev --no-install-recommends \
	&& pecl install imagick \
	&& docker-php-ext-enable imagick \
	&& docker-php-ext-install mcrypt pdo_mysql

	function autobind<TFunction extends Function>(constructor: TFunction):TFunction {
	const newConstructor = function(...args) {
	constructor.apply(this, args);
	for (const property in this) {
	if (typeof this[property] !== typeof Function) {
	continue;
	}

	this[property] = this[property].bind(this);
	}

	cat > /tmp/subscript.sh << EOF
	# START UBUNTU USERSPACE

	echo "Setting up NodeJS Environment"
	curl https://raw.githubusercontent.com/creationix/nvm/v0.25.0/install.sh \| bash

	echo 'export NVM_DIR="/home/ubuntu/.nvm"' >> /home/ubuntu/.bashrc
	echo '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm' >> /home/ubuntu/.bashrc

	# Dot source the files to ensure that variables are available within the current shell