Graz Infracoders Meetup Discusses Habitat, Containers and Orchestrators
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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.
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Graz Infracoders Meetup Discusses Habitat, Containers and Orchestrators
- 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
- 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/
- 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.
- 25. API first
- 26. Small Area of Concern
- 27. Ephemeral
- 29. Kubernetes & Habitat is about running modern apps.
- 30. Habitat
- 31. API First
- 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
- 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/