AlexKalinin

# Simple extension of Net::FTP to allow uploading a stream instead of a file
# This allows for transferring of files between servers without downloading entire file first

# The code below is a modification of the storbinary method in Net::FTP
# https://github.com/ruby/ruby/blob/trunk/lib/net/ftp.rb#L686
# It goes without saying that the code may break at anytime and may or may not work with other
# features of Net::FTP such as using Resume.

require 'net/ftp'

AlexKalinin

NOTE: This Gist concerns the old Linode KVM Beta, NOT the current Manager. Please see linode/docs#501 (comment) for more up-to-date instructions.

You will need:

• Windows Server 2012 R2 iso. Obtain from MSDN
• A server with libvirt/virt-manager/KVM/etc set up.
• Fedora-sourced Windows virtio drivers: https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/virtio-win-0.1.103-2/virtio-win-0.1.103.iso
• A Linode 1GB in the KVM beta, booted into Rescue mode, with a 20GB(20480MB) "raw" image.

On the KVM source, run the following to create a VM:

AlexKalinin

# Precondition: Git for Windows 2.9.0 + Windows 7, other version of Git for Windows & Windows XP and Windows 10 should also be supported

# In /etc/ssh/sshd_config, set UsePrivilegeSeparation to no
# You can also change other settings of SSHD like port in this file

# Generate key pairs
ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -q -N ""
ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -q -N ""
ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -q -N ""
ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -q -N ""

AlexKalinin

# Recursively diff two hashes, showing only the differing values.
# By Henrik Nyh <http://henrik.nyh.se> 2009-07-14 under the MIT license.
#
# Example:
#
# a = {
#   "same"   => "same",
#   "diff"   => "a",
#   "only a" => "a",
#   "nest" => {

AlexKalinin

# got from here: https://stackoverflow.com/a/43819672



# Define some required dependencies
require "bundler/inline"
gemfile(false) do
  source "https://rubygems.org"
  gem "activerecord", "~> 4.2.8"
  gem "sqlite3"

AlexKalinin

# Generate a self-signed Certificate and a Private Key
openssl req -x509 -nodes -days 365 -newkey rsa:1024 -keyout pkey.pem -out cert.crt

AlexKalinin

How to config rabbitmq server cluster [3 nodes]

Edit /etc/hosts

vi /etc/hosts
192.168.10.157  rabbitmq-1
192.168.10.159  rabbitmq-2
192.168.10.161  rabbitmq-3

AlexKalinin

/**
 * Retrieves all the rows in the active spreadsheet that contain data and logs the
 * values for each row.
 * For more information on using the Spreadsheet API, see
 * https://developers.google.com/apps-script/service_spreadsheet
 */
function readRows() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var rows = sheet.getDataRange();
  var numRows = rows.getNumRows();

AlexKalinin

Logging Rails 4 to Syslog, formatted w/ Logstash

Getting Started

Steps to get Rails 4 saving its output to Syslog via Rsyslog. This assumes you are on CentOS, but should be pretty adaptable to any other distribution. Ruby 2.0+ is also required.

1. Add the gems lograge and logstash-event to your Gemfile. Feel free to remove from production if you'd like to test it in development as well or something.
2. Update production.rb with the lograge settings and set the logger to Syslog::Logger.
3. Add the conf files to /etc/rsyslog.d/. /etc/rsyslog.conf should have $IncludeConfig /etc/rsyslog.d/*.conf enabled, so it will load any additional configs from /etc/rsyslog.conf.

AlexKalinin

require 'docile'

# Family tree node, mother and father are Person values as well
Person = Struct.new(:name, :mother, :father)

# Recursive dsl in a mutating builder using Docile
def person(&block)
  Docile.dsl_eval(PersonBuilder.new, &block).build
end