Alexander Kabanov shurikk

golang, terraform, azure, ruby, rails, javascript, postgres, redis, networking, dns, full stack

shurikk / detach-app-from-current-session1.sh

Last active December 18, 2015 15:08

detach non-daemonized application from current session with user switching

	#!/bin/sh

	# * script is executed by root
	# * will detach from current session

	su -p user <<"EOF"
	/path/to/app -o option1 > /path/to/app.log 2> /path/to/app-errors.log &
	echo $! > /path/to/app.pid
	EOF

shurikk / gist:5944995

Created July 7, 2013 21:13

execute shell command with a timeout

	#!/usr/bin/env ruby

	require 'timeout'

	def exec_with_timeout(cmd, timeout)
	r,w = IO.pipe
	pid = Process.spawn(cmd, {[:err, :out] => w, :pgroup => true})
	w.close

	[begin

shurikk / tcp_socket_proxy_monkey_patch.rb

Created April 26, 2014 03:22

TCPSocket proxy monkey patch

	# Usage:
	#
	# TCPSocket.socks_server = "socks-proxy.example.net"
	# TCPSocket.socks_port = 8888

	require 'socket'

	class TCPSocket

	alias :direct_to :initialize

shurikk / gist:3c7ddd925d4e0eb70054

Created May 12, 2015 00:43

crontab string eval

	class Foo
	def schedule
	# crontab like string, e.g. "5 * * * *"
	end

	def run?(time)
	fields = schedule.split(/\s+/)

	!%w(min hour day month wday).map.with_index do \|name, i\|
	fields[i].gsub(/(?:(?![\d\/\,]).)/, '').split(',').select do \|v\|

shurikk / iptables.sh

Created February 10, 2021 18:08

nginx as a transparent SSL proxy using stream module (quick test)

	iptables -t nat -A OUTPUT -p tcp -m tcp --dport 443 -m owner --uid-owner root -j RETURN
	iptables -t nat -A OUTPUT -p tcp -m tcp --dport 443 -m owner --uid-owner nginx -j RETURN
	iptables -t nat -A OUTPUT -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 3130