engineerball’s gists

engineerball / decryption.sh

Last active September 8, 2015 04:37

generate file 100B, 10KB, 1MB, 100MB using openssl and test encrypt and decrypt

	#!/bin/sh

	PASSWORD="COYS"
	DATE=`date +'%Y%m%d-%H%M%S'`
	OUTPUT="decryption-result-$DATE.txt"

	mkdir "plaintext"
	touch $OUTPUT

	for i in 100 10240 1000000 100000000

engineerball / modular-multiplicative-inverse.py

Last active March 5, 2026 15:11

A python code for calculate GCD and modular multiplicative inverse

	def inverseMod(a, m):
	for i in range(1,m):
	if ( m*i + 1) % a == 0:
	return ( m*i + 1) // a
	return None

	def gcd(a, b):
	"""Calculate the Greatest Common Divisor of a and b.
	Unless b==0, the result will have the same sign as b (so that when
	b is divided by it, the result comes out positive).

engineerball / comparehex.py

Last active October 22, 2015 08:16

CompareHex in python

	def comparehex(algorithm, hexstring1, hexstring2):
	if algorithm == "md5":
	num_of_bits = 128
	elif algorithm == "sha1":
	num_of_bits = 168
	elif algorithm == "sha256":
	num_of_bits = 256

	print "Algorithm: ", algorithm
	binstring1 = bin(int(hexstring1, 16))[2:].zfill(num_of_bits)

engineerball / master-config.yaml

Last active December 28, 2015 07:32

	#cloud-config

	users:
	- name: core
	ssh-authorized-keys:
	- ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCbl2K9rz8aHoDks1+rjqN9aefeHe7ePiLJsTSgP4empJInzf6/nXd1FD5vC7TJAJ6UwkhqxEQiSe/ziglZQTKyqM5RTrjsfAWCBRdTOLcEDel59gEKIMJ9eV6PfLmGApxiER1Hqv8WUHv+6QdEICyaszo+nXYHQHwFap5jSl6JUKFhGv8StDpH8/7LsVQFJKZTFvKoCREyUZ3G56Tq2Cre+kUnoytpX9FlOI/9KvBkC8kUwrRY5Bd4vZY6SJ210Bhi7J0tM3wchB0W08R+cCmYWJrxQpEeYtXVWCeQXENyiDmTBOa1C/mE2jvOXOUpz6v7jL+vhJMSPtKpFu3wvOfd ball@ultraball
	groups:
	- sudo
	shell: /bin/bash

engineerball / make_keys.sh

Created December 19, 2015 09:24

	mkdir tmp
	openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout tmp/nginx.key -out tmp/nginx.crt -subj "/CN=nginxsvc/O=nginxsvc"

	echo "apiVersion: v1
	kind: Secret
	metadata:
	name: nginxsecret
	type: Opaque
	data:
	nginx.crt: `base64 -w 0 tmp/nginx.crt`

engineerball / Vagrantfile

Last active September 10, 2016 05:44

Vagrant file for devops workshop

	Vagrant.configure("2") do \|config\|
	config.vm.define "node-1" do \|node\|
	node.vm.box = "ubuntu/trusty64"
	node.vm.hostname = "node-1"

	node.vm.network :private_network, ip: "192.168.56.101"

	node.vm.provider :virtualbox do \|v\|
	v.customize ["modifyvm", :id, "--memory", 1024]
	v.customize ["modifyvm", :id, "--name", "node-1"]

engineerball / install-docker.sh

Last active December 8, 2016 06:37

Devops

	sudo apt-get update
	sudo apt-get install -y apt-transport-https ca-certificates git
	sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
	echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" \| sudo tee /etc/apt/sources.list.d/docker.list
	sudo apt-get update
	sudo apt-get install -y docker-engine
	#sudo systemctl start docker.service
	sudo service docker restart

	sudo usermod -aG docker $USER

engineerball / logstash.conf

Last active September 28, 2016 09:57

view docker logs in ELK

engineerball / graph-matrix.py

Created November 3, 2016 19:41

extract node detail and matrix from graph xml

	from xml.dom import minidom
	from signal import signal, SIGPIPE, SIG_DFL
	from sys import argv
	script, filename = argv
	signal(SIGPIPE,SIG_DFL)

	edge = []
	xmldoc = minidom.parse(filename)
	itemlist = xmldoc.getElementsByTagName('node')
	print(len(itemlist))

engineerball / master01-config.yaml

Last active February 15, 2017 11:25

Kubernetes on Coreos

	#cloud-config
	hostname: master01
	coreos:
	etcd2:
	discovery: https://discovery.etcd.io/<token-id>
	listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
	advertise-client-urls: http://172.17.181.247:2379
	listen-peer-urls: http://172.17.181.247:2380,http://172.17.181.247:7001
	initial-advertise-peer-urls: http://172.17.181.247:2380
	data-dir: /var/lib/etcd2

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