RulerOf

Keybase proof

I hereby claim:

• I am rulerof on github.
• I am abobulsky (https://keybase.io/abobulsky) on keybase.
• I have a public key ASCjqjneTXV6VZmalCQiZ4Crnvsd6dAqjlhF2KH71wHElAo

To claim this, I am signing this object:

RulerOf

# Set a user to delete
targetUser = ThisGuy

# Set the name of our awscli profile
aws_profile = prod

# Get all the keys that the user has on its account
userKeys=$(aws iam list-access-keys --user-name $targetUser --profile $aws_profile | jq -r '.AccessKeyMetadata[].AccessKeyId')
 
# Delete the keys

RulerOf

#!/usr/bin/env bash
# shellcheck disable=SC2046

# We're catching errors manually here
set +e

# Start off the output formatting for this whole thing
echo "----"

if command -v VBoxManage >/dev/null 2>&1 ; then

RulerOf

#!/bin/bash

# content-engine-update.sh pulls new container images and starts those images
# if there are any updates to be found. The "proper" way to do this is with 
# the v2tec/watchtower docker image, but I prefer this method because of the 
# logging output I get with this single-host setup

# Get the script name
scriptName="$(basename $0)"

RulerOf

Installing ZFS on Linux on Oracle Linux 7

We're going to add ZFS support to our Oracle Linux installation. We'll just add the ZFS on Linux Repo, verify the binary signature from GitHub, install the files, ensure the driver loads properly, and verify that it's functional. We'll save things like array creation for another document.

This is mostly a transcription of the process from the CentOS/RHEL ZoL installation manual.

Note

This will install ZFS v0.7 release on OEL 7.7 and earlier, and ZFS 0.8 on OEL 7.8 and later.

Install the repo file

RulerOf

variable "map1" {
  default = [
             {
               name = "map1name1",
               default_ip_address = "map1addr1"
             },
             {
               name = "map1name2",
               default_ip_address = "map1addr2"
             }

RulerOf

class Arn
  attr_accessor :partition
  attr_accessor :service
  attr_accessor :region
  attr_accessor :account
  attr_accessor :resource

  def initialize(partition, service, region, account, resource)
    @partition = partition
    @service = service

RulerOf

Use the minified code inside of a bookmarklet. You can test it directly in your browser console on any YouTube video page. It ought to work anywhere but was only tested in Chrome 83.

When you're on a YouTube page, click the bookmarklet and it'll take you to the embedded version of the player that fills the entire window without requiring you to go to full screen mode. This is particularly useful if you have a 16:10 monitor.

The non-minified code is included as a reference to show how it works. There are other window-filling bookmarklets out there. I made this one because I wanted to write it.

RulerOf

Creating a raidz3 pool with Fusion io SLOG and L2ARC cache

Using the following hardware:

• 23 3TB Hitachi Ultrastar disks
• 2 640GB Fusion io ioDrive Duo cards, each with 2 separate storage devices on them

The plan is to create a RAIDz3 zpool with 20 disks in the array, 3 hot spares, a mirrored log device containing one drive from each of the ioDrives, and two cache devices made out of the remaining ioDrives. We'll also underprovision the ioDrives to help with wear leveling, since 320GB ZIL and 640GB cache are excessive for this setup.

Underprovision the ioDrives

RulerOf

DNS SRV with Terraform (On AWS Route53)

DNS SRV records are a little cryptic. Even when you create them, it's not particularly obvious what the information in the SRV record actaully means.

When creating the records with Terraform, you can for_each the resource to supply one or more maps that contain better descriptors of the SRV record's constituent components. See the example in the terraform snippet below. Refer here for a longer explanation.