Building (cloudless) Enterprise Applications with Ruby

Most people working with startups are used to the comfort of working with the cloud. When your product needs to work on-premise, you need a different mindset on the architecture and on the overall decisions you make.

------

Presented for the local ruby community in Florianópolis, SC - Brazil.

https://www.meetup.com/rubyfloripa/events/242262291/

Transcript

1. View Slide

2. Building C
   Enterprise Applications
   R
   

   View Slide

3. @brodock
   blog.gabrielmazetto.eti.br
   Gabriel Mazetto
   

   View Slide

4. Everyone can contribute
   

   View Slide

5. View Slide

6. But the majority of our
   clients are on-premise...
   

   View Slide

7. The Enterprise market is all
   about supporting
   ...
   

   View Slide

8. Forget the simplicity of
   spinning up a VM at will
   

   View Slide

9. The Enterprise is all about
   the baseline
   

   View Slide

10. Physical machines +
    Physical disks
    

    View Slide

11. Your major stakeholder is
    the IT department
    

    View Slide

12. Make their lives better and
    you win big
    

    View Slide

13. How do I do that?
    

    View Slide

14. You will probably have to
    support multiple
    L D
    

    View Slide

15. Forget OAuth2!
    The hot protocols are
    LDAP and AD
    

    View Slide

16. B E !
    

    View Slide

17. Do you really need Ruby
    2.4.X or can it be >= 2.2.X ?
    

    View Slide

18. Do you really need that
    optional PG extension?
    

    View Slide

19. Think about progressive
    enhancement...
    

    View Slide

20. Re-evaluate your
    

    View Slide

21. You may not have
    

    View Slide

22. You may not even have
    

    View Slide

23. Few strategies...
    

    View Slide

24. Provide source installation
    

    View Slide

25. Provide Virtual Machine
    Images
    

    View Slide

26. Make every external
    dependency configurable
    

    View Slide

27. production:
    adapter: postgresql
    encoding: unicode
    database: gitlabhq_production
    pool: 10
    # username: git
    # password:
    # host: localhost
    # port: 5432
    

    View Slide

28. development:
    url: redis://localhost:6379/10
    #
    # url: redis://localhost:6380
    # sentinels:
    # -
    # host: localhost
    # port: 26380 # point to sentinel, not to redis port
    # -
    # host: slave2
    # port: 26380 # point to sentinel, not to redis port
    

    View Slide

29. Make your application
    behavior configurable
    

    View Slide

30. gitlab:
    ## Web server settings (note: host is the FQDN, do not include http://)
    host: localhost
    port: 3000
    https: false
    user: brodock
    ## Default project features settings
    default_projects_features:
    issues: true
    merge_requests: true
    wiki: true
    snippets: true
    builds: true
    container_registry: true
    

    View Slide

31. When your code
    expects S3 endpoint
    

    View Slide

32. Rewrite to use fog,
    or use minio
    

    View Slide

33. How to protect your
    source-code?
    

    View Slide

34. Compile and pack with
    JRuby
    

    View Slide

35. Use Ruby-Encoder
    

    View Slide

36. But the best DRM is a good
    Contract
    

    View Slide

37. How we ship?
    

    View Slide

38. packages.gitlab.com
    Multiple Distros,
    Multiple Versions
    

    View Slide

39. All dependencies in a
    single package
    

    View Slide

40. Major release every 22nd
    

    View Slide

41. Omnibus Chef
    https://github.com/chef/omnibus
    

    View Slide

42. name 'ruby'
    default_version '2.3.5'
    dependency 'zlib'
    dependency 'openssl'
    dependency 'libffi'
    dependency 'libyaml'
    dependency 'libiconv'
    version('2.3.5') { source sha256:
    '5462f7bbb28beff5da7441968471ed922f964db1abdce82b8860608acc23ddcc' }
    source url:
    "https://cache.ruby-lang.org/pub/ruby/#{version.match(/^(\d+\.\d+)/)[0]}/ruby-#{
    version}.tar.gz"
    build do
    command "./configure"
    command "make"
    command "make install"
    end
    

    View Slide

43. You can still plug external
    managed dependencies
    

    View Slide

44. /etc/gitlab/gitlab.rb
    

    View Slide

45. Is ruby viable for
    enterprise?
    Y , !
    

    View Slide

46. Q ?
    

    View Slide