1. Vagrant

2. Mitchell Hashimoto
@mitchellh

4. Vagrant
With a focus on Ops

5. Agenda

6. Agenda
What is Vagrant

7. Agenda
What is Vagrant
Why use Vagrant

8. Agenda
What is Vagrant
Why use Vagrant
DevOps with Vagrant in mind

9. Vagrant
What is Vagrant?

10. The Grid

11. A tool for building and distributing
virtualized environments.

12. A local cloud.

13. Create and tear down virtual machines

14. Create and tear down virtual machines
Use automation to provision and configure

15. Create and tear down virtual machines
Use automation to provision and configure
Network multiple virtual machines

16. Create and tear down virtual machines
Use automation to provision and configure
Network multiple virtual machines
Package and distribute VM images

17. Vagrant
Why use Vagrant?

18. User space
Browser Editor
Queue Other
Music Server Server
Web DB App
IRC IM
Server Server Server
Operating System

20. No isolation

21. No isolation
No repeatability

22. No isolation
No repeatability
No verification

23. User space
Virtualized OS
Browser Editor
Web App
DB Server
Server Server
IRC IM
Operating System

24. Isolation

25. Isolation
Mirror production

26. Isolation
Mirror production
Test Ops scripts with a free server

27. Isolation
Mirror production
Test Ops scripts with a free server
Faster onboarding

28. Isolation
Mirror production
Test Ops scripts with a free server
Faster onboarding
Designers can do it, too!

29. Vagrant
DevOps

30. Goal: Develop
Cookbooks/Modules to run in a VM
and production.

31. Little extra effort.
Big gain.
Good practices.

32. Little extra effort.
Big gain.
Good practices.

33. Don’t assume EC2/RackSpace/MyCloudInc
# Allow app servers to access DB
-A INPUT -p tcp
-s <%= node[:ec2][:local_ipv4] %>
--dport <%= node[:mysql][:port] %>
-j ACCEPT

34. Don’t assume EC2/RackSpace/MyCloudInc
# Allow app servers to access DB
-A INPUT -p tcp
-s <%= local_ip(node) %>
--dport <%= node[:mysql][:port] %>
-j ACCEPT

35. Don’t assume EC2/RackSpace/MyCloudInc
# Returns the local-network IP of a node
# based on the environment.
def local_ip(node)
return “127.0.0.1” if in_vagrant?
return node[:ec2][:local_ipv4] if in_ec2?
raise “Unknown server environment.”
end

36. Short-circuit Recipes/Manifests
INFO: Chef Run complete in 1442.890442 seconds
INFO: Running report handlers
INFO: Report handlers complete

38. Short-circuit Recipes/Manifests
# Only install certain software when not
# in Vagrant.
if !in_vagrant?
include_recipe “flume::node”
include_recipe “kiip_monitoring::client”
...
end

39. Short-circuit Recipes/Manifests
INFO: Chef Run complete in 946.418511 seconds
INFO: Running report handlers
INFO: Report handlers complete
Not great, but I’ll take 50% speedups.

40. Flexible Configuration
attributes = {
:kiip_mongo => {
:mount_ebs => false
},
:kiip_web => {
:app_source => "folder"
},
...
}

41. Role Composition
run_list => [
“role[base]”,
“role[kiip_mongodb]”,
“role[kiip_memcached]”,
“role[kiip_web]”,
“role[kiip_utility]”
]
Normally different servers.
But no problem on one!

42. DevOps Zen

43. Vagrant
Is it battle tested?

49. vagrantup.com
github.com/mitchellh/vagrant