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Apologies

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I work here.

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Deploying Rails Applicationson a Slicehost VPS

Jared KuoltSuperJared.com

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What is a VPS?

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What is a VPS?(We call them Slices)

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According to Wikipedia

A virtual private server is a method ofpartitioning a physical server computer into multiple

servers that each has the appearance and capabilitiesof running on its own dedicated machine. Each virtualserver can run its own full-fledged operating system,and each server can be independently rebooted.

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According to Jared

A virtual private server is a magic box that

places power in the hands of the developer, assumingknowledge of sophisticated spells like ssh, grep, andthe all-powerful magic missile.

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But seriously folks...

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+

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Who needs a VPS?

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PSYCH!

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No way!

Its for real, true, honest-to-goodness, actual, nonfictional,real-life...

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Good for...

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Rails

Camping

Merb

et cetera

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Django

TurboGears

Pylons

etc cetera

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Anything?

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Not quite.

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Installation

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Install PrerequisiteSoftware

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Apt-get?

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$ sudo apt-get install ruby mysql-server

rubygems ruby1.8-dev build-essentiallibmysql-ruby irb nginx subversion

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$ sudo gem update$ sudo gem update --system

* Note: gem error: /usr/bin/gem:23:uninitialized constant Gem::GemRunner

(NameError)

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$ sudo gem update$ sudo gem update --system

* Note: gem error: /usr/bin/gem:23:uninitialized constant Gem::GemRunner

(NameError)

FIX: add "require 'rubygems/gem_runner'"after "require 'rubygems'" in /usr/bin/gem

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$ sudo gem install rails$ sudo gem install mongrel_cluster

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Create Database

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$ mysql -u root -p> create database myapp;

> GRANT ALL ON myapp.*TO 'myuser'@'localhost'

IDENTIFIED BY 'mypassword';

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Create Repository

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$ svnadmin create repository/

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Import Project

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Import Project(from your local machine)

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$ svn import myapp \svn+ssh://example.com/home/jared/repository/myapp \-m 'Initial import'

$ mv myapp myapp-old$ svn co svn+ssh://example.com/home/jared/repository/myapp

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Setup Capistrano

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$ capify .$ mongrel_rails cluster::configure -e production -p 3000 -a127.0.0.1 -N 3 -c /var/www/myapp/current

$ svn add Capfile config/mongrel_cluster.yml config/deploy.rb$ svn ci -m 'Adding Mongrel cluster and Capistrano information'$ cap deploy:setup$ cap deploy:cold

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http://example.com:3000

http://example.com:3000/http://example.com:3000/

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Surviving a Reboot

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$ crontab -e

@reboot mongrel_rails cluster::start -C \/var/www/myapp/current/config/mongrel_cluster.yml

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What about port 80?

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Nginx?

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Nginx?(Its pronounced engine-x)

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upstream mongrel {server 127.0.0.1:3000;server 127.0.0.1:3001;server 127.0.0.1:3002;

}

server {listen 80;server_name .example.com;root /var/www/myapp/current/public;

location / {if (-f $request_filename/index.html) {

rewrite (.*) $1/index.html break;}

if (!-f $request_filename) {proxy_pass http://mongrel;

}}

}

http://mongrel/http://mongrel/

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http://example.com/

http://example.com:3000/http://example.com:3000/

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What now?

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# Make some changes

$ svn ci$ cap deploy

# Lather, rinse repeat

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http://articles.slicehost.com

http://articles.slicehost.com/http://articles.slicehost.com/

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Fin