joshuap

# config/initializers/redis.rb
require 'redis'

# Disables the `flushdb` and `flushall` commands.
class Redis
  module DangerousCommands
    def flushdb
      raise 'This is EXTREMELY DANGEROUS! If you really want to EMPTY THE ENTIRE DATABASE, do it from `redis-cli`.'
      # You could call `super` here if you want to allow access in some circumstances.
    end

rafaelgaspar

remove_duplicates.rb

Remove duplicate Resque jobs that have already been queued for processing.

Execute

To run this against a Rails installtion in production use the following command: bundle exec rails runner -e production /path/to/script/remove_duplicates.rb. See rails runner for more information.

Notes

tristanfisher

Working with ansible-vault

---

I've been using a lot of Ansible lately and while almost everything has been great, finding a clean way to implement ansible-vault wasn't immediately apparent.

What I decided on was the following: put your secret information into a vars file, reference that vars file from your task, and encrypt the whole vars file using ansible-vault encrypt.

Let's use an example: You're writing an Ansible role and want to encrypt the spoiler for the movie Aliens.

jobwat

#!/bin/bash

# inspired from: https://gist.github.com/vitobotta/2783513

threshold=300 # after 5min of uptime, a job is considered 'stuck', to kill
logfile=log/dead_workers_killed.log

function ps_etime_to_seconds() # cheers user000001 - http://stackoverflow.com/questions/14652445/parse-ps-etime-output-into-seconds#14653443
{
  echo $1 | awk -F $':' -f <(cat - <<-'EOF'

KartikTalwar

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

• a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
• H: preserves hard-links
• A: preserves ACLs

jweir

# thank you http://www.mysqlperformanceblog.com/2008/02/04/finding-out-largest-tables-on-mysql-server/
SELECT CONCAT(table_schema, '.', table_name),
       CONCAT(ROUND(table_rows / 1000000, 2), 'M')                                    rows,
       CONCAT(ROUND(data_length / ( 1024 * 1024 * 1024 ), 2), 'G')                    DATA,
       CONCAT(ROUND(index_length / ( 1024 * 1024 * 1024 ), 2), 'G')                   idx,
       CONCAT(ROUND(( data_length + index_length ) / ( 1024 * 1024 * 1024 ), 2), 'G') total_size,
       ROUND(index_length / data_length, 2)                                           idxfrac
FROM   information_schema.TABLES
ORDER  BY data_length + index_length DESC
LIMIT  10;

gnepud

ENV["RAILS_ENV"] = "test"
require File.expand_path('../../config/environment', __FILE__)
require 'rails/test_help'
require 'minitest/autorun'
require 'minitest/pride'
require 'capybara/rails'


class MiniTest::Spec
  include ActiveSupport::Testing::SetupAndTeardown

cloud8421

wget -q -O - https://raw.github.com/gist/2204072/install_tmux_1.6_on_ubuntu_10.04.sh | sudo bash