amosshapira’s gists

amosshapira / psk-generator.sh

Created February 19, 2016 00:55

	#!/bin/sh

	# A good generator of IPSec PSK's
	< /dev/urandom tr -dc a-zA-Z0-9_ \| head -c30

amosshapira / get-stack-name

Created February 1, 2016 04:58

Fetch the name of the CloudFormation stack of an EC2 instance

	# get instance-id from meta-data, if you like:
	INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id)
	aws ec2 describe-instances \
	--instance-id $INSTANCE_ID \
	--query 'Reservations[].Instances[].Tags[?Key==`aws:cloudformation:stack-name`].Value' \
	--output text

amosshapira / copy-from-time-machine.sh

Created January 23, 2016 22:32 — forked from vjt/copy-from-time-machine.sh

Copy data from a Time Machine volume mounted on a Linux box.

	#!/bin/bash
	#
	# Copy data from a Time Machine volume mounted on a Linux box.
	#
	# Usage: copy-from-time-machine.sh <source> <target>
	#
	# source: the source directory inside a time machine backup
	# target: the target directory in which to copy the reconstructed
	# directory trees. Created if it does not exists.
	#

amosshapira / gist:c8ccd305da2c3eaf2a06

Created December 3, 2015 22:00

Install skew (https://github.com/scopely-devops/skew) on Mac OSX El-Capitan

	#!/bin/bash

	# Reference: https://github.com/pypa/pip/issues/3165
	sudo -H pip install skew --ignore-install six

amosshapira / time_series_fit.rb

Created December 3, 2015 10:29 — forked from matschaffer/time_series_fit.rb

	require 'gsl'
	require 'time'

	module Diskalerter
	class ThresholdEstimator
	attr_reader :timestamps, :signal, :threshold, :now

	# timestamps - a list of timestamps in epoch milliseconds
	# signal - a list of values for the provided timestamps
	# threshold - the "exhaustion" threshold (e.g., 100 for a percentage signal)

amosshapira / get-all-s3-prefix-lists

Created December 2, 2015 03:54

Fetch the S3 prefix list ID's for S3 in all AWS regions. These are can then be used as destinations in route tables

	#!/bin/bash

	# Fetch the S3 prefix list ID's for S3 in all AWS regions.
	# These are can then be used as destinations in route tables

	aws ec2 describe-regions --query 'Regions[*].RegionName' \| \
	jq -r '.[]' \| \
	while read REGION
	do
	echo ==== $REGION ====

amosshapira / extract-vpc-endpoint-policy-document

Created December 1, 2015 01:17

Extract the PolicyDocument of an AWS VPC Endpoint

	#!/bin/bash
	aws ec2 describe-vpc-endpoints --region ap-southeast-2 \| \
	jq -r '.VpcEndpoints[].PolicyDocument'

amosshapira / list-aws-availability-zones

Created November 30, 2015 06:06

List all AWS regions and EC2 availability zones using AWS cli

	#!/bin/bash

	# Uses jq to extract data from JSON
	aws ec2 describe-regions \| \
	jq -r '.Regions[] \| .RegionName' \| \
	while read i
	do
	echo ==== $i ====
	aws ec2 describe-availability-zones --region $i \| \
	jq -r '.AvailabilityZones[] \| .ZoneName'

amosshapira / how-to-install-dpdk-on-ubuntu.sh

Created November 20, 2015 05:27 — forked from ConradIrwin/how-to-install-dpdk-on-ubuntu.sh

	# If you're looking into the C10M problem (10 million concurrent connections)
	# you might want to play with DPDK (Originally proprietry Intel, now open source)
	#
	# C10M: http://c10m.robertgraham.com/
	# DPDK: http://dpdk.org/
	#
	# This is a quick summary how to install dpdk on ubuntu
	# running inside virtualbox on a mac

	# On my Mac:

amosshapira / new_gist_file_0

Created November 20, 2015 05:22

Calculate total space (in GB) used by RDS snapshots in a given region. AWS does NOT charge for storage of snapshots up to the total size of the primary DB as long as the RDS instance is running. Ref about pricing: https://aws.amazon.com/rds/pricing/

	aws rds describe-db-snapshots --region=us-east-1 \| \
	jq '.DBSnapshots \| .[] \| .AllocatedStorage' \| \
	awk '{s+=$1}END{print s}'

Amos Shapira amosshapira