Urjit Singh Bhatia urjitbhatia

urjitbhatia / consulLock.sh

Last active February 7, 2020 23:43

Consul Lock/Unlock with timeout

	#!/bin/bash

	set -e

	export CONSUL_HTTP_ADDR="https://my-consul-address"
	VALUE=$(consul kv get <key>)

	if [ "$VALUE" != "locked" ]; then
	# Unlocked, check the timeout
	TIMEOUT=$(echo $VALUE \| jq 'reduce .[] as $num (0; .+$num)')

urjitbhatia / cf_log_parse_awk.sh

Created September 12, 2019 00:55

Parse CloudFront logs via awk

	#!/bin/bash

	HTTP_STATUS_CODE=421
	CF_DISTRIBUTION_NAME=foobar

	s3cmd "s3://${S3_BUCKET}/${LOGS_PREFIX}"
	## OR s3cmd "s3://${S3_BUCKET}/${LOGS_PREFIX}/${CF_DISTRIBUTION_NAME}" to download only specific distributions

	zcat *.gz \| awk 'match($9, /421/) && match($7, /foobar/) { print $7" "$9" "$16" "$10 }'

urjitbhatia / bash_debug.sh

Created August 25, 2019 02:28

Bash debug trick

	#!/bin/bash

	# exit when any command fails
	set -e

	current_command=$BASH_COMMAND
	last_command=""

	# keep track of the last executed command
	trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG

urjitbhatia / getec2lifecycle.sh

Created May 3, 2019 18:52

Check if an ec2 instance is spot or normal lifecycle

	#!/bin/bash

	aws ec2 describe-spot-instance-requests \
	--filters Name=instance-id,Values="$(wget -q -O - http://169.254.169.254/latest/meta-data/instance-id)" \
	--region us-east-1 \| \
	jq -r '.SpotInstanceRequests \| if length > 0 then "spot" else "normal" end'

urjitbhatia / custom_download_strategy.rb

Created January 18, 2019 22:14

A custom vendored github private release homebrew tap formula

	require "json"
	require "rexml/document"
	require "time"
	require "unpack_strategy"
	require "lazy_object"
	require "cgi"

	class AbstractDownloadStrategy
	extend Forwardable
	include FileUtils

urjitbhatia / getIfaceIP.sh

Created May 4, 2018 22:33

Get the current external facing interface ip

ip route get 8.8.8.8 | awk '{print $NF; exit}'

urjitbhatia / Send docker image over ssh

Created April 2, 2018 00:40

One liner to send docker image to a remote host over ssh

	docker save <image> \| bzip2 \| pv \| ssh user@host 'bunzip2 \| docker load'

	## Credits: https://stackoverflow.com/questions/23935141/how-to-copy-docker-images-from-one-host-to-another-without-via-repository

urjitbhatia / nomadTerminator.sh

Last active December 23, 2021 18:38

Drain a nomad EC2 spot instance node on termination

	#!/bin/bash
	CMD="curl --write-out %{http_code} --silent --output /dev/null http://169.254.169.254/latest/meta-data/spot/termination-time"
	while true
	do
	if [ "$(${CMD})" != "404" ]; then
	# 2 minute warning received. Do all your cleanup work.
	echo "2 minute termination warning. Draining nomad node..."
	nomad node-drain -yes -self -enable
	echo "Hasta la vista baby, I will be back"
	break

urjitbhatia / haproxy_cfg.conf

Created March 29, 2018 21:52

haproxy send a percentage of traffic

	# send 10% traffic
	http-request set-header Host foo.bar.com if { rand(10) eq 0 }

urjitbhatia / ramdisk.sh

Created June 10, 2017 06:57 — forked from rxin/ramdisk.sh

ramdisk create/delete on Mac OS X.

	#!/bin/bash

	# From http://tech.serbinn.net/2010/shell-script-to-create-ramdisk-on-mac-os-x/
	#

	ARGS=2
	E_BADARGS=99

	if [ $# -ne $ARGS ] # correct number of arguments to the script;
	then