Check out Michael Ducy's Hands-On Session about Habitat at the Infracoders Meetup Graz. Thanks Michael for providing the slides.

1. •1700 – Welcome!
•1705 – Introduction to Habitat with Hands on Work
•1830 – Wrap Up!

2. Habitat Code of Conduct
https://github.com/habitat-sh/habitat/blob/master/CODE_OF_CONDUCT.md
We value the participation of each member of the community and want all attendees
to have an enjoyable and fulfilling experience. Accordingly, all attendees are
expected to show respect and courtesy to other attendees throughout all Meetup
events.
To make clear what is expected, all delegates/attendees, speakers, exhibitors,
organizers, and volunteers at any Habitat event are required to conform to our Code
of Conduct. Organizers will enforce this code throughout events.

3. •Join the Habitat Community
•Build, manage, deploy an app with Habitat
•Share your experience
Goals for today

4. #graz-workshop
http://slack.habitat.sh

7. We Run Infrastructure
To Run Applications
That the Business Requires

9. https://twitter.com/codinghorror/status/347070841059692545

10. Building and running applications is painful

11. • Tied to particular runtimes and environments
Building and running applications is painful

12. • Tied to particular runtimes and environments
• Different packages for different operating Systems
Building and running applications is painful

13. • Tied to particular runtimes and environments
• Different packages for different operating Systems
• Different packages for bare metal, virtual machines, cloud instances, and
containers
Building and running applications is painful

14. Habitat builds and runs
modern applications

15. Modern application
• Is immutable

16. Modern application
• Is immutable
• Is agnostic to running environment

17. Modern application
• Is immutable
• Is agnostic to running environment
• Reduces complexity

18. Modern application
• Is immutable
• Is agnostic to running environment
• Reduces complexity
• Enables scaling

19. Modern Applications
Source
Code
Repo

20. Modern Applications
Source
Code
Repo
Artifact

21. Modern Applications
Source
Code
Repo
Artifact
Artifact
Repo

22. Modern Applications
Source
Code
Repo
Artifact
Bare Metal
Container
Cloud Instance
VM
Artifact
Repo

23. Habitat is a new technology to build,
deploy, and manage applications…

24. …in any environment
from traditional datacenters
to containerized microservices

25. In Habitat, the application
is the unit of automation

26. National Parks
• National Parks Application
Java Application running in Tomcat
MongoDB

28. https://goo.gl/tSSMtT

29. National Parks
• National Parks Application
Java Application running in Tomcat
MongoDB
Start the Supervisor first

30. Installs automatically
Keeps things running
Supervisor runs services

31. $
Start the Supervisor
∵ Missing package for core/hab-sup/0.22.1
» Installing core/hab-sup/0.22.1
↓ Downloading core/hab-sup/0.22.1/20170509232715
1.99 MB / 1.99 MB [===================] 100.00 % 49.58 MB/s
...
★ Install of core/hab-sup/0.22.1/20170509232715 complete with 13 new packages installed.
hab-sup(MR): Supervisor Member-ID 99dc88cdd71c45dcb19dcd6e8d5af150
hab-sup(MR): Starting gossip-listener on 0.0.0.0:9638
hab-sup(MR): Starting http-gateway on 0.0.0.0:9631
sudo hab sup run

32. Load MongoDB Service
The Supervisor is designed to supervise one or more services concurrently
Launch a second terminal window

33. $
» Installing learn/mongodb
↓ Downloading learn/mongodb/3.2.10/20170407074757
24.76 MB / 24.76 MB - [=================] 100.00 % 67.70 MB/s
...
✓ Installed learn/mongodb/3.2.10/20170407074757
★ Install of learn/mongodb/3.2.10/20170407074757 complete with 1 new packages installed.
hab-sup(MN): The learn/mongodb service was successfully loaded
Load MongoDB into the Supervisor
sudo hab sup load learn/mongodb

34. $
Start MongoDB – more output
hab-sup(MR): Starting learn/mongodb
mongodb.default(SR): Hooks recompiled
default(CF): Updated mongos.conf
8c3e4cd2f3cdd7cd922ce3b529f93672f3af8274e5f6d462a5f8824c25bbbe18
default(CF): Updated mongod.conf
f9886a510442a32e91d38a79b0baad2a4bb589ba36fed74e2ea3493d517d8bd5
mongodb.default(SR): Configuration recompiled
mongodb.default(SR): Initializing
mongodb.default(SV): Starting process as user=hab, group=hab
mongodb.default(O): note: noprealloc may hurt performance in many applications

35. This raises some questions!
• Where are these packages coming from?
• What configuration options are available for MongoDB?

36. Central location
Publicly hosted
Lightweight views
Stored in a depot

37. https://app.habitat.sh/#/pkgs/learn

38. What are the tunables?
[mongod.net]
bind_ip = "127.0.0.1"
ipv6 = false
...
[mongod.security]
authorization = "disabled"
cluster_auth_mode = "keyFile"
javascript_enabled = true
key_file = ""
...
$ sudo hab sup config learn/mongodb

39. Create a configuration file
$ sudo hab sup config learn/mongodb > mongodb.toml

40. [mongod.net]
bind_ip = "127.0.0.1"
bind_ip = "0.0.0.0"
ipv6 = false
...
[mongod.security]
authorization = "disabled"
cluster_auth_mode = "keyFile"
cluster_auth_mode = ""
javascript_enabled = true
...
Edit the mongodb.toml
-
+
-
+

41. Never do this at home!
• We are about disable some MongoDB security

42. Manages configuration
Installs automatically
Keeps things running
Supervisor runs services

43. $
Change the configuration for MongoDB
mongodb.default(SR): Hooks recompiled
default(CF): Updated mongod.conf
12a29a9de79166f30aa87640bc4ba4a88b6dc4d4641cf0d6ed00e179229d576f
mongodb.default(SR): Configuration recompiled
mongodb.default(SV): Stopping...
hab-sup(SV): mongodb.default - Shutdown method: Graceful Termination
hab-sup(SV): mongodb.default - process 19873 died with exit code 0
hab-sup(SV): mongodb.default - Service exited
mongodb.default(SV): Starting process as user=hab, group=hab
mongodb.default(O): note: noprealloc may hurt performance in many applications
mongodb.default(SR): Hooks recompiled
sudo hab config apply --peer 127.0.0.1 mongodb.default
1 mongodb.toml

44. Applying Configuration
sudo hab config apply --peer 127.0.0.1 mongodb.default 1 mongodb.toml
• peer - hostname or IP address of a running supervisor
• mongodb.default - the service group
• 1 - the incarnation of this configuration
• mongodb.toml - the file with the new configuration

45. Supervisors provide a REST API
External Actors
Health and
Status
Supervisor
Debugging

46. • http://YOUR_IP:9631/services
• http://YOUR_IP:9631/services/mongodb/default/config
REST API

47. • http://YOUR_IP:9631/services/mongodb/default/config
REST API

48. • http://YOUR_IP:9631/services/mongodb/default/config
REST API
With JSONView
Chrome Plugin

49. Supervisors self-organize
Service
Discovery
Service Groups

50. $
Start Java Application
sudo hab sup load learn/national-parks
--bind database:mongodb.default
hab-sup(PK): learn/national-parks not found in local package cache, installing
from https://willem.habitat.sh/v1/depot
» Installing learn/national-parks
↓ Downloading learn/national-parks/0.1.5/20170407081316
5.75 MB / 5.75 MB | [===================] 100.00 % 51.62 MB/s
...
★ Install of learn/national-parks/0.1.5/20170407081316 complete with 9 new
packages installed.
hab-sup(MN): The learn/national-parks service was successfully loaded

51. $
Start Java Application
hab-sup(MR): Starting learn/national-parks
mongodb.default(SR): Hooks recompiled
national-parks.default(SR): Hooks recompiled
national-parks.default(SR): Initializing
national-parks.default hook[init]:(HK): Seeding Mongo Collection
...
national-parks.default hook[init]:(HK): 2017-05-11T20:12:10.850+0000
imported 359 documents
...
national-parks.default(O): 11-May-2017 20:12:12.715 INFO [main]
org.apache.catalina.startup.Catalina.start Server startup in 1172 ms

52. http://YOUR_IP:8080/national-parks

53. Supervisors provide a REST API
External Actors
Health and
Status
Supervisor
Debugging

54. REST API
• http://YOUR_IP:9631/services
• http://YOUR_IP:9631/services/mongodb/default/config
• http://YOUR_IP:9631/services/national-parks/default/config

55. HTTP API
•/services
•/services/{name}/{group}/config
•/services/{name}/{group}/health
•and more!
•https://www.habitat.sh/docs/run-packages-monitoring/

56. Habitat Concepts
• hab command
• Supervisor
• Habitat Depot
• Service Discovery
• Application Configuration

57. Operable Applications
•Isolated
•Immutable
•Atomic
•Configurable
•Common interface for monitoring health
•Rebuild from source
•Common packaging
•Runtime Independence

58. It’s all open source
Apache License

60. Unload the services
hab-sup(SV): national-parks.default - Shutdown method: Graceful Termination
hab-sup(SV): national-parks.default - process 2457 died with exit code 143
hab-sup(SV): national-parks.default - Service exited
$ sudo hab sup unload learn/national-parks

61. Unload the services
hab-sup(SV): mongodb.default - Shutdown method: Graceful Termination
hab-sup(SV): mongodb.default - process 2572 died with exit code 0
hab-sup(SV): mongodb.default - Service exited
$ sudo hab sup unload learn/mongodb

62. What’s Next?
• Use a provided Habitat development environment, or install Habitat locally
• Join the Habitat Slack Team - http://slack.habitat.sh/
• Work through the tutorial at https://www.habitat.sh/tutorials/
• Explore Habitat packages on the depot - https://app.habitat.sh/
• Explore the Habitat projects - https://github.com/habitat-sh
• Read Habitat Blog posts - https://blog.chef.io/category/habitat/
• Package one of your own applications
• Demo your work throughout the event
• Join us at ChefConf - https://chefconf.chef.io/