nweddle

Hostnames

Automate Server:  $cardnumberof$cardsuite.automate.e9.io
Workstation:      $cardnumberof$cardsuite.workstation.e9.io

Credentials

Username:  chef
Password: C0d3Can

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:

Vinai

#!/bin/bash

# CREATE BACKUPS BEFORE RUNNING THIS SCRIPT!

for m in $(locate Mage.php | grep -v downloader); do
    cd $(dirname $(dirname $m)) || (echo && continue) # old locate db
    MAGE_VERSION=$(php -d error_reporting=0 -r "require 'app/Mage.php'; Mage::app(); echo Mage::getVersion();")
    if echo $MAGE_VERSION | egrep -q "^[0-9.]+$"; then
        if [ $MAGE_VERSION "<" 1.4.0.0 ] || [ $MAGE_VERSION ">" 1.7.0.1 ]; then
            echo -e "No patch available for version $MAGE_VERSION in $(pwd)\n"

fxtentacle

input {
  exec {
     type => "dstat"
     command => "dstat -cdngypms --nocolor 1 0"
     interval => 13
   }

   exec {
      type => "apache-benchmark"