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Deploying Julia on heroku

Let's assume that you can run your web server on your own computer, and that you can open it in your own browser (through localhost or 127.0.0.1). This guide will go through the steps of putting that app online!

This guide will be based on a hello world sample project that uses Genie.jl, but the steps from this guide apply to any Julia web framework.

heroku has tons of features, but for a simple app, we only need the basics. In particular, we do not need the heroku command line, we can do everything through the online GUI.

Basics

heroku uses git for deployment: to package your app, you create a git repository, and to put a new version of your app online, you push to the git repository. If you already know git, then you now know how to manage a web server! It's like GitHub pages, but more powerful (and more complicated). Read heroku's introduction for a basi

How to make an MDM Mac shine like it's brand new ?

Works, as of 14/04/2024, on macOS 14.4.1 and lower (prob higher but idk)

This was made for Apple Sillicon Macs.

Restore Process

You need another Mac for this.

If you don't have one and have recovery locked, it's not possible.

Setting up Heroku and Cloudflare (the right way)

The following outlines how to setup Heroku + Cloudflare with a full SSL certificate. What this means is that communication between the browser and the Cloudflare CDN is encrypted as well as communication between Cloudflare and Heroku’s origin server. Follow these steps exactly and the setup is a breeze.

Step 1: Set up domain names in Heroku

First you want to add the root domain and the www domain to heroku. You do this by clicking into your production application, then going to settings and then scrolling down to Domains and certificates.

Here you will add <your_domain>.com and www.<your_domain>.com. This will give you two CNAME records. They will look something like <your_domain>.com.herokudns.com and www.<your_domain>.com.herokudns.com.

Step 2: Add CNAME records to Cloudfare.

chime:CreateApiKey
codepipeline:PollForJobs
cognito-identity:GetOpenIdToken
cognito-identity:GetOpenIdTokenForDeveloperIdentity
cognito-identity:GetCredentialsForIdentity
connect:GetFederationToken
connect:GetFederationTokens
ecr:GetAuthorizationToken
[gamelift:RequestUploadCredentials](ht

Cloud-Init Debugging

Cloud-init combined with terraform can be a powerful tool to provision instances on startup. Debugging scripts that are run by cloud-init however are not the easiest to debug.

Logs

Usually on an Ubuntu machine a lot of what is happening can be found in the syslog

cat /var/log/syslog

	[Unit]
	Wants=network-pre.target
	Before=network-pre.target shutdown.target

	[Service]
	User=root
	ExecStart=/bin/sh -ec '\
	[ -x /usr/bin/wslinfo ] && [ "$(/usr/bin/wslinfo --networking-mode)" = "mirrored" ] \|\| exit 0;\
	echo "\
	add chain ip nat WSLPREROUTING { type nat hook prerouting priority dstnat - 1; policy accept; };\

	#!/bin/bash

	# Tom Hale, 2016. MIT Licence.
	# Print out 256 colours, with each number printed in its corresponding colour
	# See http://askubuntu.com/questions/821157/print-a-256-color-test-pattern-in-the-terminal/821163#821163

	set -eu # Fail on errors or undeclared variables

	printable_colours=256

	// Place inside an "Editor" folder
	#if PLATFORM_STANDALONE_WIN
	using System;
	using System.IO;
	using UnityEditor;
	using UnityEditor.Callbacks;
	using UnityEngine;

	public static class FbxBlenderOpeningProcessor
	{

	interfaces {
	lo0 {
	unit 0 {
	family inet {
	filter {
	input-list [ discard-frags accept-single-hop-bfd-v4 accept-multi-hop-bfd-v4 accept-bgp-v4 accept-ospf2 accept-vrrpv3-v4 accept-established-v4 accept-common-services-v4 discard-all-v4 ];
	}
	}
	family inet6 {
	filter {