The document summarizes an Infracoders Meetup that took place in Graz, Austria on June 27, 2017. It discusses the Infracoders network, infrastructure automation technologies like Habitat and containers, and the agenda for the meetup which included a talk by Michael Ducy of Chef on Habitat, containers, and orchestrators. The next meetup was planned for September 12th to discuss container monitoring with Prometheus.

1. Infracoders Meetup GRAZ
27th of June, 2017

2. Infracoders
• Network all over the world (Austria, Germany, UK,
USA,…)
• Infrastructure Automation
• Technologies: Habitat, Containers, Orchestrators,
Chef, Puppet, Docker, Jenkins etc.
• Exchange of ideas, tips & tricks
Leitnergasse 16, 8010 Graz | www.infralovers.com

3. Plan for the future
• Next Meetup: 12th of September
• Topic: Dynamic Infrastructure and Container
Monitoring with Prometheus
• Give a speech
• Contact: linkedin.com/in/theresa-wallas
twallas@infralovers.com
Leitnergasse 16, 8010 Graz | www.infralovers.com

4. Agenda
19:00-20:00 Talk
• Michael Ducy, Director of Product Marketing at Chef
• Habitat, Containers, Orchestrators
20:00-21:00 Networking
• Drinks & Sushi are sponsored by Infralovers
Leitnergasse 16, 8010 Graz | www.infralovers.com

5. Habitat, Containers,
Orchestrators
Michael Ducy

6. Containers, Habitat, and
Orchestration
Michael Ducy - Chef - @mfdii

7. Habitat Community
• 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/?s=habitat
• Join the Habitat Forums - https://forums.habitat.sh/

18. Current Container Pain

19. Containers aren’t a VM

20. You sure about that?

21. Current Container Usage
•4 to 1 container to host ratio
•75% of containers container a full OS

22. Easy to do the wrong thing
FROM ubuntu:12.04
FROM debian:latest
FROM centos:centos7

23. Lift and Shift your
Technical Debt for
fun and profit.

24. Modern Applications

25. API first

26. Small Area of Concern

27. Ephemeral

28. Focus on Artifacts

29. Kubernetes & Habitat is
about running modern apps.

30. Habitat

31. API First

32. Focuses on Artifacts

33. Eliminates the OS

34. Operable Application Containers
• Isolated
• Immutable
• Configurable
• Common interface for monitoring health
• Rebuild from source
• Common packaging
• Runtime Independence

35. The dreaded build cycle
wget https://some.place/package.tar.gz
tar xfzv package.tar.gz
./configure
make
make install

36. The dreaded build cycle

37. The dreaded build cycle

38. Habitat Defines the Build Lifecycle
• Default implementation is C/C++ Build Lifecycle
• Other default implementations provided by Scaffolding
• core/scaffolding-ruby
• core/scaffolding-node
• Build dependencies explicitly declared
• Runtime dependencies explicitly declared.

39. Libraries
Operating System
Application
Traditionally
the domain of
the OS
Vendor
Application Libraries
Config Changes

40. Application &
Libraries
Minimized OS

42. Docker
ACI
Mesosphere
Post-process packages

43. Habitat on Kubernetes
• Habitat:
• Responsible for the Application
• Kubernetes
• Responsible for the Infrastructure (ReplicaSets, Pods, Services, etc)

44. What do applications need to run?

45. What do applications need to run?
• Lifecycle events
• Start, Stop, Reconfigure, etc
• Environment specific configuration
• Knowledge of peers
• Knowledge of dependent services

46. Lifecycle Hooks
• init
• run
• health_check
• file_updated
• reload
• reconfigure
• post-run
• suitability

47. Configuration
• Config files stored in ./config
• Default values provided by
• Scaffolding
• default.toml
• Override defaults through
• ENV variable
• user.toml
• Over the network

48. Supervisors form a ring
Peers
Service Groups
Gossip
Availability
increases with
scale

49. Daemon Sets on Kubernetes
• Provides the ability to run a copy of a Pod on every node
• New nodes automatically start a copy of the Pod
• Useful for “Management Components” (logging collection, metric
collection, storage daemons, etc)

50. Habitat Containers as a Daemon Set
• Provides a common “boot strapping” end point for applications
• Automatically scales with Kubernetes
• Easily lookup any Habitat Service Group

51. What do applications need to run?

52. Supervisors support topologies
Dynamic
configuration
Service group
level
Uses the ring

53. Self Organizing Applications
• Habitat applications can self organize
• Typical pattern
• Bake intent into the container
• Redis-master container image
• Redis-follower container image
• Introduces image sprawl

54. Self Organizing Applications
• Habitat pattern
• One container image
• Launch images with knowledge of peers
• Application self organizes

55. Self Organizing Applications
• Habitat config files, hooks, and labeling
• Config files are generating based on self organization
• Hooks will be fired after the application self-organizes
• Hooks can communicate with other services (Kubernetes) to inform services
of changes

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

57. LivenessProbe
livenessProbe:
httpGet:
path: /services/<pkgname>/<servicegroup/health
port: 9631
initialDelaySeconds: 3
periodSeconds: 3

58. What Habitat brings to Containers:
• Build containers from the Application down
• Export containers in a variety of formats
• Automatically export containers with:
• Service Discovery
• Configuration Management
• Supervisor API
• Clustering Topology Support

59. Where to go?
• Export target for Kubernetes (generate the needed YAML)
• Direct communication between the Kubernetes API & Supervisors
• ThirdParty Operators

60. It’s all open source
Apache License

61. Questions
• Github repo with this demo- https://github.com/mfdii/hab_on_k8s
• 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/?s=habitat
• Join the Habitat Forums - https://forums.habitat.sh/