Immutable servers with Chef, Packer and AWS EC2. Brief introduction into all tools.

1. Immutable Servers
Меняйте сервера, как перчатки!

2. Павел Габриель
CTO
whitepayments.com
@alovak

4. DevOps
is Ruining
My Craft
– ALEX TATIYANTS http://tatiyants.com/devops-is-ruining-my-craft/

5. “I come from a long line of
sysadmins. My father was a
sysadmin, as was his father
before him…”

6. “I consider myself an artist and a
craftsman of server building.”

7. “…my greatest achievement is a
collection of servers I built and
configured… Just like beautiful
snowflakes swirling in the winter’s
breath, no two were exactly alike,
but all were quite similar…”

8. Who is Who?

9. What is IS?

10. – http://martinfowler.com/bliki/ImmutableServer.html
“…a server that once deployed,
is never modified, merely
replaced with a new updated
instance.”

11. How to implement IS?

12. Ingredients
Kris Krüg: Chai Tea Raw Fresh Organic Ingredients https://flic.kr/p/2gZEE

13. 1

14. “configuration management tool”

15. Resources

18. Recipes

20. Cookbooks

21. mysql, nginx, apache, java, apt,
git, postgresql,
build-essential, php, nodes,
mongoldb, etc..

22. 2

23. – Packer.io
“Packer is a tool
for creating identical machine images
for multiple platforms
from a single source configuration”

24. “A machine image is a static unit that
contains a pre-configured operating
system and installed software …”

25. Builders
• EC2 AMI
• DigitalOcean
• VirtualBox
• VMWare
• Parallels
• OpenStack
• etc.

26. Provisioners
• Shell
• Ansible
• Chef
• Puppet
• Salt

27. Templates

31. Building

35. 3

36. “Manage virtual servers,
load balancers
and …”

39. Through the API
Ruby, JS, Python, Java, C#, PHP, Go

40. 4
a.pitch: smooth stones https://flic.kr/p/5xh1aD
Architecture

41. Visible DNS, LB
Volatile app servers
Persistance db, logs

42. ELB
app app app
DB
Visible
Volatile
Persistance

43. ELB
app app app
DB

44. Lets Mix It!

45. Application
RubyOnRails

46. https://alovak@github.com/white-payments/api.git

47. Chef Recipes
To configure app server

48. Chef Cookbooks
• ruby
• git
• application_ruby
• nginx
• monit (or runit)

49. Packer Template
• amazon-ebs
• chef-solo

50. Ruby Scripts to
Orchestrate

64. DONE!

65. ?

66. PCI DSS

67. Because
• Scalability
• Testability
• No ad-hoc changes
• …

68. But!

69. 1 server - 1 role

70. Micro-services
architecture

71. Discoverability

72. Data Storages

73. Freshness

74. Time

75. Спасибо!

76. ?
alovak@gmail.com