1. Digital Ocean
Meetup
What I do with my $5 (per month actually)

2. Introduction
About me? Or about Digital Ocean?

3. What I’m going to talk
about

4. So why DO?

5. The Adverts

6. Price?

7. Easy?

8. Performance?
• Sorry no picture.
• Benchmarks gives some indication, but hard to
make it really objective and useful.
• Location. DO has no Asia servers.. yet.

9. It depends.
Cliché I know.

10. Experience with DO
• I have a website: www.dilegno.sg
• Some parts of Shoppink use Digital Ocean
• Plus my random stuff I’m going to share with you

11. Alternatives?
Many.

12. Setting up DO

13. One

14. Two

15. That’s it!

16. A website

17. Recipe
• A personal website.
• Simply get a web server running (apache or nginx)
• My website uses Sinatra.
• We then need to get nginx talking to Sinatra.

18. Sinatra
• Sinatra is a Ruby micro-framework
• require 'sinatra'
get '/hi' do
"Hello World!"
end

19. Unicorn
# set path to app that will be used to configure unicorn,
# note the trailing slash in this example
@dir = "/home/sockmister/personal-website/"
worker_processes 1
working_directory @dir
timeout 30
# Specify path to socket unicorn listens to,
# we will use this in our nginx.conf later
listen "#{@dir}tmp/sockets/unicorn.sock", :backlog => 64
# Set process id path
pid "#{@dir}tmp/pids/unicorn.pid"
# Set log file paths
stderr_path "#{@dir}log/unicorn.stderr.log"
stdout_path "#{@dir}log/unicorn.stdout.log"

20. Nginx
• sudo apt-get install nginx
• We can start, stop, restart by
o sudo service nginx restart|start|stop|status
• We then write the config files.

21. The Idea
• The apps we are running today run behind nginx.
Nginx
App1
App2
App3
Incoming Requests
Outgoing Replies

22. Config File
upstream pohchiat{
server unix:/home/sockmister/personal-website/tmp/sockets/unicorn.sock;
}
server {
listen 80;
server_name www.pohchiat.com;
root /home/sockmister/personal-website/public;
location / {
proxy_pass http://pohchiat;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}

23. Done!

24. Free GitHub repos
Using GitLab

25. Recipe
• Setup GitLab
o Install dependencies
o Setup new user
o Clone and install GitLab shell
o Setup database (postgresql or mysql)
o Setup GitLab itself
• Hook up with Nginx

26. Dependencies
• Python 2
o Sudo apt-get install python
• Ruby
o Ubuntu repositories are outdated
o I use rvm to handle ruby versions.
• Gem
o gem install bundler

27. Adduser
• We need to create a new user called ‘git’.
o sudo adduser --disabled-login --gecos 'GitLab' git

28. GitLab Shell
• Clone
o sudo -u git -H git clone https://github.com/gitlabhq/gitlab-shell.git
• Git checkout the right version
o sudo -u git -H git checkout v1.7.1
• Edit config file
o sudo -u git -H editor config.yml
• Run a script
o sudo -u git -H ./bin/install

29. Database
• Install postgresql
o sudo apt-get install -y postgresql-9.1 libpq-dev
• Login
o sudo -u postgres psql -d template1
• Create user and database
o CREATE USER git WITH PASSWORD '$password';
o CREATE DATABASE gitlabhq_production OWNER git;

30. GitLab
• Clone
o sudo -u git -H git clone https://github.com/gitlabhq/gitlabhq.git gitlab
• Git checkout
o sudo -u git -H git checkout 6-1-stable
• Configure
o Copy and change GitLab config file
o Mkdir for logs, tmp, public
o Copy and change unicorn config file
• Install required Gems
o gem install charlock_holmes --version '0.6.9.4'
o bundle install --deployment --without development test mysql aws
• Initialize DB
o sudo -u git -H chmod o-rwx config/database.yml
o bundle exec rake gitlab:setup RAILS_ENV=production
• Run as service

31. Nginx
• This time GitLab has supplied the Nginx config file.
• The idea though, is really the same.

32. Done!

33. E-Book manager
Calibre Library

34. Calibre Library
This needs a bit of intro.

35. Calibre Library

36. Recipe
• Setup calibre app (this time it’s actually really
simple)
• Setup dropbox daemon
• Hook up to Nginx (same!)

37. Setup Calibre
• sudo python -c "import sys; py3 = sys.version_info[0] > 2; u =
__import__('urllib.request' if py3 else 'urllib', fromlist=1);
exec(u.urlopen('http://status.calibre-ebook.com/linux_installer').read()); main()
• To start calibre server,
• Sudo /opt/calibre/calibre-server
• Options:
• --with-library
• --username
• --password
• --daemonize

38. Dropbox
• I run calibre on my laptop as well.
• Need a simple way to sync the books both ways.
• Trivia: NUS won Dropbox space race a while ago
and all NUS students have 25 GB extra space.

39. Dropbox
• Download & install
o wget -O dropbox.tar.gz http://www.dropbox.com/download/?plat=lnx.x86
o tar –xzvf dropbox.tar.gz
• Run
o ~/.dropbox-dist/dropboxd
• Link to your Dropbox account
o This client is not linked to any account…
• Control Dropbox
o wget -O ~/.dropbox/dropbox.py
"http://www.dropbox.com/download?dl=packages/dropbox.py"

40. Done!

41. Caveats
• It’s experimental.
• Just because you can, doesn’t mean you should.
• 512MB RAM
• Erm. I cheated. I paid for domain too.

42. Takeaway
• Tons of open source projects to try out.
• It’s not a must to run this on DO.

43. Resources
• Digital Ocean has a lot of guides. A lot a lot.

44. Otherwise…
• Setup nginx
o http://ruby-journal.com/how-to-setup-rails-app-with-puma-and-nginx/
o http://recipes.sinatrarb.com/p/deployment/nginx_proxied_to_unicorn
• GitLab
o https://github.com/gitlabhq/gitlabhq/blob/6-1-
stable/doc/install/installation.md
• Calibre server
o http://manual.calibre-ebook.com/cli/calibre-server.html
• Dropbox daemon
o http://ubuntuservergui.com/ubuntu-server-guide/install-dropbox-ubuntu-
server

45. Thank you!