czarneckid

Zero downtime deploys with unicorn + nginx + runit + rvm + chef

Below are the actual files we use in one of our latest production applications at Agora Games to achieve zero downtime deploys with unicorn. You've probably already read the GitHub blog post on Unicorn and would like to try zero downtime deploys for your application. I hope these files and notes help. I am happy to update these files or these notes if there are comments/questions. YMMV (of course).

Other application notes:

• Our application uses MongoDB, so we don't have database migrations to worry about as with MySQL or postgresql. That does not mean that we won't have to worry about issues with the database with indexes being built in MongoDB or what have you.
• We use capistrano for deployment.

Salient points for each file:

andrew

## Rails Upgrade check
#
# Check your github repos for out of date rails apps
#
# usage: $ USERNAME=yourusername PASSWORD=yourpassword ruby railscheck.rb
# or
# usage: $ USERNAME=yourusername PASSWORD=yourpassword ORG=yourorgname ruby railscheck.rb
#
# n.b requires the octokit gem

kasima

# Description:
#   Control your nest thermostat.
#
# Commands:
#   hubot how (warm|cold) is it - current temperature
#   hubot it's warm - set the nest 1 degree Fahrenheit lower
#   hubot it's cold - set the nest 1 degree Fahrenheit higher
#   hubot nest status - current nest setting

# https://github.com/kasima/nesting

eric

# load plugin
load 'boundary'

# Notify boundary with your orgid, apikey
boundary.register 'cdd7261592bca18539eae9bb5f1bcfdd', 'f9e6282c4727c5733585a4be86e0f990'

NickJosevski

window.MyView = Backbone.View.extend({
  initialize: ->
    _.bindAll(this,'render')
    this.template = window.JST["MyView"]
    this.model.bind('change', this.render)

  render: ->
    $(this.el).html(this.template(this.model.toJSON()))

  events: {

dhh

class PostsController < ActionController::Base
  def create
    Post.create(post_params)
  end
  
  def update
    Post.find(params[:id]).update_attributes!(post_params)
  end

  private

brentkirby

#!/bin/bash -e
#
# Since unicorn creates a new pid on restart/reload, it needs a little extra love to 
# manage with runit. Instead of managing unicorn directly, we simply trap signal calls
# to the service and redirect them to unicorn directly.
#
# To make this work properly with RVM, you should create a wrapper for the app's gemset unicorn.
#

function is_unicorn_alive {

jstorimer

RedisSessionStore.logger = Rails.logger

session_options = {:expire_after => 1.day, :key_prefix => 'sessions'}
MultiSessionStore.stores[:plain] = [RedisSessionStore, session_options.merge(:key => '_session_id')]
MultiSessionStore.stores[:secure] = [RedisSessionStore, session_options.merge(:key => '_secure_session_id', :secure => ['production', 'staging'].include?(Rails.env))]
MultiSessionStore.default_store = :plain

MultiSessionStore.routes = [
  ['/admin', :secure],
]

apsoto

#
# Tasks to keep your repository in sync with your Chef Server
#
# Author:: Matthew Kent (<mkent@magoazul.com>)
# Copyright:: Copyright (c) 2010 Matthew Kent
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

bkeepers

$('input[type=submit], button').live('click', function() {
  $('<input type="hidden" class="button" />')
    .attr({name:this.name, value:this.value || this.innerHTML})
    .appendTo(this.form);
});

$('form').live('reset', function() {
  $(this).find('input[type=hidden].button').remove();
});