colin

# Nginx+Unicorn best-practices congifuration guide. Now with SPDY!
# We use latest stable nginx with fresh **openssl**, **zlib** and **pcre** dependencies.
# Some extra handy modules to use: --with-http_stub_status_module --with-http_gzip_static_module
#
# Deployment structure
#
# SERVER:
#  /etc/init.d/nginx                             (1. nginx)
#  /home/app/public_html/app_production/current  (Capistrano directory)
#

colin

rds-modify-db-parameter-group {param-group-name} \
--parameters="name=character_set_server, value=utf8, method=pending-reboot" \
--parameters="name=collation_server, value=utf8_general_ci, method=pending-reboot" \
--parameters="name=tmp_table_size, value={DBInstanceClassMemory/16}, method=pending-reboot" \
--parameters="name=max_heap_table_size, value={DBInstanceClassMemory/16}, method=pending-reboot" \
--parameters="name=query_cache_type, value=1, method=pending-reboot" \
--parameters="name=query_cache_size, value=131072, method=pending-reboot" \
--parameters="name=table_open_cache, value=2500, method=pending-reboot" \
--parameters="name=join_buffer_size, value={DBInstanceClassMemory/64}, method=pending-reboot" \
--parameters="name=thread_cache_size, value={DBInstanceClassMemory/12582880}, method=pending-reboot" \

colin

module Capistrano
  class Configuration
    module Namespaces
      def skippable_task(name, *args, &block)
        task name, *args do
          if find_servers_for_task(current_task).empty?
            logger.info "skipping #{current_task.fully_qualified_name} since it matches no servers"
          else
            block.call
          end

colin

# Install gems locally, and only locally, without gem complaining
# about path access, and ensuring access to executables.
# 
# Goes in .bash_profile or .bash_login.

export GEM_PATH="$HOME/.gem/ruby/1.8"
export GEM_HOME="$HOME/.gem/ruby/1.8"
export PATH="$HOME/.gem/ruby/1.8/bin:$PATH"

colin

# you'd obviously have more settings somewhere
set :scm,        :git
set :repository, "git@github.com:defunkt/github.git"
set :branch,     "origin/master"
set :migrate_target, :current

set(:latest_release)  { fetch(:current_path) }
set(:release_path)    { fetch(:current_path) }
set(:current_release) { fetch(:current_path) }

colin

# NewRelic instrumentation for ThinkingSphinx
if defined? ActiveRecord
  ActiveRecord::Base.class_eval do
    class << self
      add_method_tracer :search, 'ActiveRecord/#{self.name}/search'
      add_method_tracer :search, 'ActiveRecord/search', :push_scope => false
      add_method_tracer :search, 'ActiveRecord/all', :push_scope => false

      add_method_tracer :search_count, 'ActiveRecord/#{self.name}/search_count'
      add_method_tracer :search_count, 'ActiveRecord/search_count', :push_scope => false

colin

#
# Created by Eric Lindvall <eric@sevenscale.com>
#
# WHAT: Provides a simple overview of memory allocation occuring during a
# require.
#
# For a longer explanation, see my post at:
#
# http://bitmonkey.net/post/308322913/tracking-initial-memory-usage-by-file-in-ruby
#

colin

require 'open-uri'

# url dsl -- the ultimate url dsl!
#
# You just can't beat this:
#
#   $ irb -r url_dsl
#   >> include URLDSL
#   => Object
#   >> http://github.com/defunkt.json

colin

module Harmony
  # Allows accessing config variables from harmony.yml like so:
  #   Harmony[:domain] => harmonyapp.com
  def self.[](key)
    unless @config
      raw_config = File.read(RAILS_ROOT + "/config/harmony.yml")
      @config = YAML.load(raw_config)[RAILS_ENV].symbolize_keys
    end
    @config[key]
  end

colin

#!/usr/bin/env ruby

require 'rubygems'
require 'daemons'

Daemons.run_proc('PassengerMonitor') do

  command = 'sudo passenger-memory-stats'
  memory_limit = 250