Andrew Kulakov Andrew8xx8

## application-notes-zero-downtime-deploys-unicorn-nginx-runit-rvm-chef.md

      
              6 files
            
          
              24 forks
            
          
              4 comments
            
          
              102 stars
            
          
                czarneckid
                / application-notes-zero-downtime-deploys-unicorn-nginx-runit-rvm-chef.md
            
            
              Last active
              September 13, 2022 01:22
            
          
    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:

  
## templater.js
/*
Usage:
fetchTemplate('#hello_world', {
	h: 'Hello',
	w: 'world',
})

<!DOCTYPE HTML>
<html>
	<body>

## gist:2469037
# -*- mode: ruby -*-
# vi: set ft=ruby :
# David Lutz's Multi VM Vagrantfile
# inspired from Mark Barger's https://gist.github.com/2404910

boxes = [
  { :name => :web,    :role => 'web_dev',     :ip => '192.168.33.1', :ssh_port => 2201, :http_fwd => 9980, :cpus =>4, :shares => true },
  { :name => :data,        :role => 'data_dev',         :ip => '192.168.33.2', :ssh_port => 2202, :mysql_fwd => 9936, :cpus =>4 },
  { :name => :railsapp,    :role => 'railsapp_dev',     :ip => '192.168.33.3', :ssh_port => 2203, :http_fwd => 9990, :cpus =>1}
]

## binary_image.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
	<title>Get binary image data from remote image</title>
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.0/jquery.min.js"></script>
	<script type="text/javascript">
	$().ready(function(){

## vimtips
Если vim автоматически не распознал DOS line ends,
то в конце строк будут символы ^M.
Удалить их можно простой заменой:

:%s/^M//g

Символ ^M при этом вводится как Ctrl-V Ctrl-M.
	/*
	Usage:
	fetchTemplate('#hello_world', {
	h: 'Hello',
	w: 'world',
	})

	<!DOCTYPE HTML>
	<html>
	<body>
	# -- mode: ruby --
	# vi: set ft=ruby :
	# David Lutz's Multi VM Vagrantfile
	# inspired from Mark Barger's https://gist.github.com/2404910

	boxes = [
	{ :name => :web, :role => 'web_dev', :ip => '192.168.33.1', :ssh_port => 2201, :http_fwd => 9980, :cpus =>4, :shares => true },
	{ :name => :data, :role => 'data_dev', :ip => '192.168.33.2', :ssh_port => 2202, :mysql_fwd => 9936, :cpus =>4 },
	{ :name => :railsapp, :role => 'railsapp_dev', :ip => '192.168.33.3', :ssh_port => 2203, :http_fwd => 9990, :cpus =>1}
	]
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
	<title>Get binary image data from remote image</title>
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.0/jquery.min.js"></script>
	<script type="text/javascript">
	$().ready(function(){
	Если vim автоматически не распознал DOS line ends,
	то в конце строк будут символы ^M.
	Удалить их можно простой заменой:

	:%s/^M//g

	Символ ^M при этом вводится как Ctrl-V Ctrl-M.