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vps_setup.md

Deploy Rails app to digitalocean/amazon EC2 with nginx, unicorn, capistrano & postgres

ubuntu 12.10 x32

ssh to root in terminal with your server ip

ssh root@123.123.123.123

or for ec2 you will need your public key

ssh -i your_public_key.pem ubuntu@your_ec2_instance_or_elastic_ip_address

Add ssh fingerprint and enter password provided in email (skip this to requirements installation if you are on EC2)

Change password

passwd

Create new user

adduser username

Set new users privileges

visudo

Find user privileges section

# User privilege specification
root  ALL=(ALL:ALL) ALL

Add your new user privileges under root & cntrl+x then y to save

username ALL=(ALL:ALL) ALL

Configure SSH

nano /etc/ssh/sshd_config

Find and change port to one that isn't default(22 is default: choose between 1025 ..65536)

Port 22 # change this to whatever port you wish to use
Protocol 2
PermitRootLogin no

Add to bottom of sshd_config file after changing port (cntrl+x then y to save)

UseDNS no
AllowUsers username

Reload ssh

reload ssh

Don't close root! Open new shell and ssh to vps with new username(remember the port, or you're locked out!)

ssh -p 1026 username@123.123.123.123

Update packages on virtual server

sudo apt-get update
sudo apt-get install -y curl

install latest stable version of rvm

curl -L get.rvm.io | bash -s stable

load rvm

source ~/.rvm/scripts/rvm

install rvm dependencies

rvm requirements

Install ruby 1.9.3

rvm install 1.9.3

Use 1.9.3 as rvm default

rvm use 1.9.3 --default

install latest version of rubygems if rvm install didn't

rvm rubygems current

Install rails gem

nano ~/.gemrc
---
:verbose: true
install: --no-rdoc --no-ri
:backtrace: false
:benchmark: false
:sources:
- http://rubygems.org/
- http://gems.github.com
- http://gemcutter.org/
update: --no-rdoc --no-ri
:update_sources: true
:bulk_threshold: 1000

gem install rails -v 3.2.16

Install rmagick dependencies

sudo apt-get install libmagickwand-dev libmagickcore-dev libmagickcore4-extra libgraphviz-dev libgvc5 
gem install rmagick

Install nokogiri

sudo apt-get install libxslt-dev libxml2-dev

Install postgres

sudo apt-get install -y postgresql postgresql-server-dev-9.1
gem install pg -- --with-pg-config=/usr/bin/pg_config

Create new postgres user

sudo -u postgres psql
create user username with password 'password';
alter role username superuser createrole createdb replication;
create database projectname_production owner username;

Install git-core

sudo apt-get install -y git-core

Install bundler

gem install bundler

Install Javascript Engine

sudo apt-get install -y nodejs

setup nginx

sudo apt-get install -y nginx
nginx -h
cat /etc/init.d/nginx
/etc/init.d/nginx -h
sudo service nginx start
cd /etc/nginx

local unicorn setup

Add unicorn to the gemfile
create unicorn.rb & unicorn_init.sh file
chmod +x config/unicorn_init.sh

nginx.conf (change projectname and username to match your directory structure!)

upstream unicorn {
  server unix:/tmp/unicorn.projectname.sock fail_timeout=0;
}

server {
  listen 80 default deferred;
  # server_name /assets.com;
  root /home/username/apps/projectname/current/public;

  location ^~ /assets/ {
    gzip_static on;
    expires max;
    add_header Cache-Control public;
  }

  try_files $uri/index.html $uri @unicorn;
  location @unicorn {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;
    proxy_pass http://unicorn;
  }

  error_page 500 502 503 504 /500.html;
  client_max_body_size 4G;
  client_body_temp_path /tmp/client_body_temp;
  keepalive_timeout 10;
}

config/unicorn.rb

root = "/home/username/apps/projectname/current"
working_directory root
pid "#{root}/tmp/pids/unicorn.pid"
stderr_path "#{root}/log/unicorn.log"
stdout_path "#{root}/log/unicorn.log"

listen "/tmp/unicorn.projectname.sock"
worker_processes 2
timeout 30

# Force the bundler gemfile environment variable to
# reference the capistrano "current" symlink
before_exec do |_|
  ENV["BUNDLE_GEMFILE"] = File.join(root, 'Gemfile')
end

config/unicorn_init.sh

#!/bin/sh
### BEGIN INIT INFO
# Provides:          unicorn
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Manage unicorn server
# Description:       Start, stop, restart unicorn server for a specific application.
### END INIT INFO
set -e

# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/username/apps/projectname/current
PID=$APP_ROOT/tmp/pids/unicorn.pid
CMD="cd $APP_ROOT; bundle exec unicorn -D -c $APP_ROOT/config/unicorn.rb -E production"
AS_USER=username
set -u

OLD_PIN="$PID.oldbin"

sig () {
  test -s "$PID" && kill -$1 `cat $PID`
}

oldsig () {
  test -s $OLD_PIN && kill -$1 `cat $OLD_PIN`
}

run () {
  if [ "$(id -un)" = "$AS_USER" ]; then
    eval $1
  else
    su -c "$1" - $AS_USER
  fi
}

case "$1" in
start)
  sig 0 && echo >&2 "Already running" && exit 0
  run "$CMD"
  ;;
stop)
  sig QUIT && exit 0
  echo >&2 "Not running"
  ;;
force-stop)
  sig TERM && exit 0
  echo >&2 "Not running"
  ;;
restart|reload)
  sig HUP && echo reloaded OK && exit 0
  echo >&2 "Couldn't reload, starting '$CMD' instead"
  run "$CMD"
  ;;
upgrade)
  if sig USR2 && sleep 2 && sig 0 && oldsig QUIT
  then
    n=$TIMEOUT
    while test -s $OLD_PIN && test $n -ge 0
    do
      printf '.' && sleep 1 && n=$(( $n - 1 ))
    done
    echo

    if test $n -lt 0 && test -s $OLD_PIN
    then
      echo >&2 "$OLD_PIN still exists after $TIMEOUT seconds"
      exit 1
    fi
    exit 0
  fi
  echo >&2 "Couldn't upgrade, starting '$CMD' instead"
  run "$CMD"
  ;;
reopen-logs)
  sig USR1
  ;;
*)
  echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
  exit 1
  ;;
esac

Add capistrano and rvm capistrano to gemfile

gem 'capistrano'
gem 'rvm-capistrano'

Create capfile & config/deploy.rb files

capify .

deploy.rb

require "bundler/capistrano"
require "rvm/capistrano"

server "123.123.123.123", :web, :app, :db, primary: true

set :application, "projectname"
set :user, "username"
set :port, 22
set :deploy_to, "/home/#{user}/apps/#{application}"
set :deploy_via, :remote_cache
set :use_sudo, false

set :scm, "git"
set :repository, "git@github.com:username/#{application}.git"
set :branch, "master"


default_run_options[:pty] = true
ssh_options[:forward_agent] = true

after "deploy", "deploy:cleanup" # keep only the last 5 releases

namespace :deploy do
  %w[start stop restart].each do |command|
    desc "#{command} unicorn server"
    task command, roles: :app, except: {no_release: true} do
      run "/etc/init.d/unicorn_#{application} #{command}"
    end
  end

  task :setup_config, roles: :app do
    sudo "ln -nfs #{current_path}/config/nginx.conf /etc/nginx/sites-enabled/#{application}"
    sudo "ln -nfs #{current_path}/config/unicorn_init.sh /etc/init.d/unicorn_#{application}"
    run "mkdir -p #{shared_path}/config"
    put File.read("config/database./assets.yml"), "#{shared_path}/config/database.yml"
    puts "Now edit the config files in #{shared_path}."
  end
  after "deploy:setup", "deploy:setup_config"

  task :symlink_config, roles: :app do
    run "ln -nfs #{shared_path}/config/database.yml #{release_path}/config/database.yml"
    run "chmod +x #{release_path}/config/unicorn_init.sh"
  end
  after "deploy:finalize_update", "deploy:symlink_config"

  desc "Make sure local git is in sync with remote."
  task :check_revision, roles: :web do
    unless `git rev-parse HEAD` == `git rev-parse origin/master`
      puts "WARNING: HEAD is not the same as origin/master"
      puts "Run `git push` to sync changes."
      exit
    end
  end
  before "deploy", "deploy:check_revision"
end

Capfile

load 'deploy'
load 'deploy/assets'
load 'config/deploy'

Shake hands with github

# follow the steps in this guide if receive permission denied(public key)
# https://help.github.com/articles/error-permission-denied-publickey
ssh github@github.com

Add ssh key to to github ssh key (no phassphrase)

ssh-keygen -t rsa -C "admin@onvard.com"
cat ~/.ssh/id_rsa.pub

Create repo and push to github

# Add config/database.yml to .gitignore
cp config/database.yml config/database./assets.yml
git init
git add .
git commit -m "Inital Commit"
git remote add origin git@github.com:username/reponame
git push origin master

Install redis for sidekiq

cd ~
sudo apt-get install tcl8.5
wget http://redis.googlecode.com/files/redis-2.6.14.tar.gz
tar xzf redis-2.6.14.tar.gz
cd redis-2.6.14/
make && make test
sudo make install
cd utils/
sudo ./install_server.sh

deployment

cap deploy:setup
# edit /home/username/apps/projectname/shared/config/database.yml on server
cap deploy:cold

after deploy:cold

sudo rm /etc/nginx/sites-enabled/default
sudo service nginx restart
sudo update-rc.d -f unicorn_projectname defaults

Make changes and deploy

# Make changes
git add .
git commit -m "Changes"
git push origin master
cap deploy

Resources from Railscasts/digital ocean documentation.

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