mrcrilly

Semantic Versioning for IAC - iacver

When it comes to Infrastructure As Code, the software versioning system known as Semantic Versioning (semver.org) works from an API perspective but falls short elsewhere.

In short a semver is broken down into three "octets" and optional, additional information tagged to the end. Here are a few examples: v1.0.1, v3.1.1, v1.15.0-4. Each of these is a valid semver.

If we take the first example - v1.0.1 - and change the first octet, 1, to 2, we're saying the following:

There has been a change to this code and that change is not compatible with how you're using v1.0.1. The change is a breaking change. You should take care to introduce version v2.0.0 into your code or your environment.

mrcrilly

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"time"

mrcrilly

Keybase proof

I hereby claim:

• I am mrcrilly on github.
• I am michaelcrilly (https://keybase.io/michaelcrilly) on keybase.
• I have a public key whose fingerprint is 736B 3A21 FFA5 E68B 7958 6051 ABDC 3DE7 C12B 5131

To claim this, I am signing this object:

mrcrilly

Terraform Modules

When developing new modules, or editing existing ones, the following standards should be met to ensure a consistent workflow is used.

Stop! Do you need to write a module?

But before we delve into the rules surrounding modules, considering the following: do you need to write a module to begin with? You should consider copying code before you consider making a module - more often than not it that code you’re writing doesn’t need to be a module

This is a big one because modules are great and it’s easy to get carried away with them, but they’re also not the ideal choice in most cases. There are some (loose) rules regarding modules that should be answered before you begin development…

mrcrilly

Hello!

A few months back I posted on Hacker News and Reddit about my Ansible and Terraform Crash Courses over at https://www.thecloud.coach/. They were a big success, attracting 3,000+ signups, and now I'd like to tell you about my up and coming live stream on Twitch: https://www.twitch.tv/thecloudcoach

I'll be building a simple infrastructure on AWS to host an MkDocs instance. I'll be using modern tools such as Terraform, Ansible, Packer, GitLab, and more.

Throughout the life of the stream we will implement all the code together, write out documentation (hence hosing an MkDocs instance!), implement CI/CD, monitoring, and much more. Everything will be open source and anyone can issue pull requests and make suggestions.

The schedule is Wednesday and Sunday, 1800 UTC+10 (Brisbane, Australia) and I'll be streaming for three hours. Perhaps more depending on how things go.

mrcrilly

module Simple where

inc, increment :: Num a => a -> a
inc x = x + 1
increment x = inc x

double :: Int -> Int
double x = x * 2

exclaim :: String -> String

mrcrilly

type Colour = String
type ColourPoint = (Int, Int, Colour)

c1 = (10, 10, "red")
c2 = (90, 90, "yellow")

colourOfPoint (x, y, c) = c

mrcrilly

Tromp-Cronin:
 CEO: Nigel McDermott
 CTO: Eleanore Howell
 CFO: Adaline Reichel
 CIO: Harvey Rippin

 Engineers:

   Malachi Davis (33)
   Access:

mrcrilly

package main

import (
	"flag"
	"fmt"
	"html/template"
	"io/ioutil"
	"os"
	"strconv"
	"strings"

mrcrilly

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

Prerequisites