YakDriver’s gists

YakDriver / shell_try_catch.sh

Created February 14, 2018 15:27

Bash Basics: A Robust try/catch/finally for shell scripts

	#!/bin/bash

	# This script uses traps to create try/catch/finally functionality in shell scripts.
	#
	# OUTPUT:
	#
	# Hello! We're reporting live from script
	# ./try_catch2.sh: line 23: badcommand: command not found
	# ./try_catch2.sh: line 23: exiting with status 127
	# It's the end of the line

YakDriver / sg.sh

Created February 22, 2018 14:19

Manage security groups (shell script) from AWS CLI

	#!/bin/bash

	# Errors are thrown if Terraform is given the name of an existing security group.
	# One solution is to find the existing security group and delete it. (That will fail if any instances are associated.)
	# This installs jq, finds security group id, deletes security group.
	#
	security_group_name=your_sg

	# 1. Install jq
	curl -L "https://github.com/stedolan/jq/releases/download/jq-1.5/jq-linux64" -o jq.dms && chmod +x jq.dms

YakDriver / gen_key.sh

Last active February 22, 2018 18:59

Generate keys

	#!/bin/bash

	org=$1
	name=${2:-$USER}

	echo "Usage: $0 [organization] [name]"

	create_date=$(date +'%Y%m%d')

	if [ -n "${org}" ] ; then org="$org " ; fi

YakDriver / node_from_uuid.sh

Created February 22, 2018 21:55

Extract node portion of UUID, bash

	$uuid = 'some-name-or-urn:8754258d-506d-e094-d51d-e0a0d891fe08' #16 octets, 10-15 are the node
	$node = $(echo $uuid \| cut -d':' -f 2 \| cut -d'-' -f 5)

	echo $node

YakDriver / utc.sh

Last active March 1, 2018 14:47

Linux/bash to display date in UTC format

	#!/bin/bash

	# Many things want UTC time as input, so here it is. As 14 days ago. Like for a query to AWS spot instance history:
	# aws ec2 describe-spot-price-history --instance-types t2.micro --start-time $(date -v-14d -u '+%FT%TZ') --product-description "Linux/UNIX"
	#
	# Output (of command below, not the aws cli command):
	# 2018-02-13T15:24:46Z
	#
	date -v-14d -u '+%FT%TZ'

YakDriver / nametag.sh

Created March 1, 2018 14:56

Set the name tag of an AWS instance from the AWS instance (e.g., in userdata)

	# terraform locals (in a .tf file)
	locals {
	name_prefix = "terrafirm"
	full_build_id = format("notcb:%s", uuid()) #128-bit rfc 4122 v4 UUID
	build_id = "${substr(element(split(":",local.full_build_id),1), 0, 8)}${substr(element(split(":",local.full_build_id),1), 9, 4)}"
	resource_name = "${local.name_prefix}-${local.build_id}"
	}

	# terraform template declaration (in a .tf file)
	data "template_file" "lx_userdata" {

YakDriver / building.misc

Created March 2, 2018 02:59

adventures in RPM builds

	pip install --index-url="https://pypi.org/simple" --upgrade virtualenv

	sudo yum groupinstall -y development
	sudo yum install -y zlib-dev openssl-devel sqlite-devel bzip2-devel
	sudo yum install xz-libs


	wget http://www.python.org/ftp/python/2.7.14/Python-2.7.14.tar.xz
	xz -d Python-2.7.14.tar.xz
	tar -xvf Python-2.7.14.tar

YakDriver / running-terraform-providers-acceptance-test.txt

Last active March 7, 2018 00:13

Running acceptance tests for Terraform Providers in go

	# Hashicorp documentation is a bit out of date so it took a minute to figure this out...

	# 1. Install go
	https://golang.org/dl/

	# 2. Make a go workspace
	$ mkdir ~/go # or wherever you want
	$ export GOPATH=~/go # could add to .bash_profile
	$ export PATH=$GOPATH:$PATH

YakDriver / userdata.ps1

Created March 16, 2018 13:27

Userdata PowerShell to set Admin Password

	<powershell>
	$Admin = [adsi]("WinNT://./Administrator, user")
	$Admin.psbase.invoke("SetPassword", "<password>")
	</powershell>

YakDriver / terraform_debug.log

Created March 22, 2018 18:40

	2018-03-22T15:09:41.743Z [DEBUG] plugin.terraform: file-provisioner (internal) 2018/03/22 15:09:41 Uploading file to 'C:\scripts\check_build.ps1'
	2018-03-22T15:09:42.378Z [DEBUG] plugin.terraform: remote-exec-provisioner (internal) 2018/03/22 15:09:42 connecting to remote shell using WinRM
	2018-03-22T15:09:42.408Z [DEBUG] plugin.terraform: remote-exec-provisioner (internal) 2018/03/22 15:09:42 Uploading file to 'C:/Temp/terraform_1217694552.cmd'
	2018-03-22T15:09:43.054Z [DEBUG] plugin.terraform: remote-exec-provisioner (internal) 2018/03/22 15:09:43 starting remote command: C:/Temp/terraform_1217694552.cmd
	2018-03-22T15:10:52.390Z [DEBUG] plugin.terraform: remote-exec-provisioner (internal) 2018/03/22 15:10:52 Uploading file to 'C:/Temp/terraform_1217694552.cmd'
	2018/03/22 15:10:53 [DEBUG] plugin: waiting for all plugin processes to complete...
	2018-03-22T15:10:53.201Z [DEBUG] plugin.terraform: remote-exec-provisioner (internal) 2018/03/22 15:10:53 [ERR] plugin: plugin server: accept unix /tmp/plugin522209802

Dirk Avery YakDriver