djk29a’s gists

djk29a / timer_obj.scala

Last active October 4, 2016 01:28

Simple Scala timer I haven't tried to use since Scala 2.08

	object Timer {
	def time[R](block: => R): Pair[Long,_] = {
	val t0 = System.nanoTime()
	val result = block
	val diff = System.nanoTime() - t0
	// Post-timing processing can be added here, maybe
	// an optional argument to this method?
	Pair(diff, result)
	}
	}

djk29a / Masks

Created March 4, 2013 19:01

	scala> for(masked <- 0 until 8) { println("Bits: 0xff & masked bits (" + masked + ") => " + (256 - (255 & (1 << masked)))) }
	Bits: 0xff & masked bits (0) => 255
	Bits: 0xff & masked bits (1) => 254
	Bits: 0xff & masked bits (2) => 252
	Bits: 0xff & masked bits (3) => 248
	Bits: 0xff & masked bits (4) => 240
	Bits: 0xff & masked bits (5) => 224
	Bits: 0xff & masked bits (6) => 192
	Bits: 0xff & masked bits (7) => 128

djk29a / export-chef-roles.sh

Last active October 9, 2015 15:48

Download Chef roles in all environments to JSON files

	mkdir environments
	for env in $(knife environment list); do
	knife environment show "${env}" --format=json > "environments/${env}.json"
	done

djk29a / bookshelf-du.rb

Last active October 9, 2015 15:47

[Chef] Get Bookshelf Usage by-org

	# Retrieve the size of Chef cookbooks used by different organizations on the Chef server it runs on
	# Should run as root normally since we use su to hop across to another user

	full_org_list=''
	full_file_list=''
	orgs={}

	# Getting orgs can take a while, let's hold onto the results for repeat invocations
	if not File.exist?('.orgs-cached')
	# NOTE: this produces 2 header lines and a footer line that has the rowcount

djk29a / mtr_mpls.sh

Created October 9, 2015 16:04

Usage of mtr to get mpls label info

sudo mtr --port 443 --show-ips -T $1 -4 --no-dns --mpls # not sure why I needed both --show-ips and --no-dns, hmm

djk29a / zscaler-status.py

Last active March 22, 2016 00:28

Parse zScaler client info page; suitable for Sensu/Nagios/Check_MK monitoring checks

	from HTMLParser import HTMLParser
	import sys

	"""
	ZScaler IP Page Parser

	$ curl -sL http://ip.zscaler.com/cgi-bin/index.cgi \| python zscaler-status.py
	{"proxycloud": "zscalertwo.net",
	"proxyhost":"zs2-redacted",
	"ip": "redacted_ip"}

djk29a / prune-chef-nodes.sh

Created March 22, 2016 00:30

Delete stale / not checking in Chef nodes

	for node in $(knife search node "ohai_time:[* TO $(date +%s -d '5hours ago')]" -i); do
	knife client delete -y $node
	knife node delete -y $node
	done

djk29a / useradd.bash

Created March 31, 2016 20:53

Add users in a list

	for u in username1 username2; do
	# Ok, the groups are probably off but you get the point
	useradd -p $(openssl passwd -1 ABC123def) -G primarygroup -g additionalgroups ${u}
	end

djk29a / deconsolidate.rb

Last active September 30, 2016 18:38

Remove duplicate files in iTunes as a result of Consolidate Files

	require 'find'
	root = '/Volumes/music' # pick your path
	Find.find(root) do \|path\|
	if FileTest.directory? path and File.basename(path)[0] == '.'
	Find.prune
	else
	d, f = File.split path
	if f =~ /^(\d+(\-\d+)?.+)(\s\d+)\.(mp3)$/i
	orig_file = File.join(d, $1 + '.' + $4) # check for existence of original file name including extension case
	if File.readable? orig_file

djk29a / gist:4888b852aea250d2ae836e939a19064f

Last active February 22, 2017 03:13 — forked from hummus/gist:8592113

aws cli + jq example

	wget http://stedolan.github.io/jq/download/linux64/jq \|\| sudo apt-get -y --force-yes install jq \|\| sudo yum install -y jq
	aws ec2 describe-instances --filters "Name=tag:Name,Values=$NAME" \
	"Name=instance-state-name,Values=running" \
	\| jq -r \
	".Reservations[] \| .Instances[] \| .InstanceId" \

	aws ec2 describe-volumes --filters \
	"Name=status,Values=available" \
	\| jq -r ".Volumes[] \| .VolumeId" \

Devon Kim djk29a