Simplifying Containers with Habitat

Presentation I gave at Boulder Docker on Jan 24, 2017

Transcript

1. 1 Joshua Timberman, Code Cleric @jtimberman
2. > greetings
3. http://chef.github.io/devops-kungfu/ https://www.youtube.com/watch?v=_DEToXsgrPc
4. Who are you? • System adminsitrators? • Software developers? • Business people? • Running docker in production? • Using Habitat?
5. Software is complex https://flic.kr/p/aTrye2
6. via https://twitter.com/codinghorror/status/347070841059692545
7. Everyone has an application https://flic.kr/p/5BFPoz
8. How do we run applications? https://flic.kr/p/6cFYpa
9. LOL
10. $ git push heroku master Push to Heroku!
11. Containers tho https://flic.kr/p/iYjsu
12. $ docker run -p 443:443 acme/website Docker! (docker docker docker)
13. http://thenewstack.io/exploding-infrastructure-automation-stack-ecosystem/
14. http://gunshowcomic.com/648
15. Containers tho https://flic.kr/p/iYjsu
16. Current Container Pain
17. Security Code Quality Container Hosting Peer Discovery Config Changes Supervision Monitoring Rolling Deployment Networking Internal Registry Workload Placement Production The Container Learning Cliff Development
19. How do you... Decouple the application build from the final production ready container?
20. How do you... Build immutable infrastructure but allow last mile Application config changes?
21. How do you... Orchestrate the application launch order & topology required?
22. How do you... Build containers with the Minimum Viable OS?
25. Modern Applications Source Code Repo Artifact Bare Metal Container Cloud Instance VM Artifact Repo
26. Build Deploy Manage
27. How do you... Decouple the application build from the final production ready container? Provide a “DSL” to describe the application build (plan.sh), and provide an isolated environment (studio) to build the application artifact (Habitat Package).
28. Starts with a plan
29. pkg_origin=core pkg_name=redis pkg_version=3.2.1 pkg_license=('BSD') pkg_maintainer="The Habitat Maintainers <humans@habitat.sh>" pkg_source=http://download.redis.io/releases/${pkg_name}-${pkg_version}.tar.gz pkg_shasum=b2a791c4ea3bb7268795c45c6321ea5abcc24457178373e6a6e3be6372737f23 pkg_bin_dirs=(bin) pkg_build_deps=(core/make core/gcc) pkg_deps=(core/glibc) pkg_svc_run="redis-server $pkg_svc_config_path/redis.config" pkg_expose=(6379) do_build() { make } Simple, Native, and Declarative
30. Versus Dockerfile… https://github.com/docker-library/redis/blob/master/3.2/Dockerfile
31. More Dockerfile… https://github.com/docker-library/redis/blob/master/3.2/Dockerfile
32. Clean room environment Safe by default Installs dependences Built in a studio
33. Upload packages to the Depot https://www.picsofcelebrities.com/celebrity/willem-dafoe/pictures/images-of-willem-dafoe.html
34. Central location Publicly hosted Lightweight channels Stored in a depot
35. Easy pattern Shortcuts Increasing specificity Installed by hab
37. Docker ACI Mesosphere Post-process packages
38. How do you... Build immutable infrastructure but allow last mile Application config changes? Ship the config along side an immutable application artifact. Provide a supervisor to dynamically update the config based on environment or service discovery.
39. Print config options 12-Factor style Externally enforced Environment configuration
40. More flexible than environment Universal location Externally enforced File configuration
41. How do you... Orchestrate the application launch order & topology required? Provide config aware, autonomous, self- organizing peers (supervisors) with built in topologies for clustering strategies.
42. Install automatically Keep things running Manage configuration Supervisors run services
43. Supervisors form a ring Peers Service Groups Gossip Availability increases with scale
44. Supervisors provide a REST API External Actors Health and Status Supervisor Debugging
45. Supervisors support topologies Dynamic configuration Service group level Uses the ring
46. Supervisors provide update strategies Topology aware Tracks views in the depot Ideal for Continuous Delivery
47. How do you... Build containers with the Minimum Viable OS? Allow applications to declare their runtime dependencies, and resolve those dependencies from the application to the infrastructure.
48. Libraries Operating System Application Traditionally the domain of the OS Vendor Application Libraries Config Changes Bottom to Top Dependency Resolution
49. Application & Libraries Minimized OS Top to Bottom Dependency Resolution
50. Where does it run? https://flic.kr/p/6VAgfR
51. Workstation, CI build node
52. Just enough OS (containers!)
53. Operable Application Containers • Isolated • Immutable • Configurable • Common interface for monitoring health • Rebuild from source • Common packaging • Runtime Independence
54. Automation travels with the application Existing & Cloud Native Software Application Automation
55. It’s all open source Apache License
56. Questions? • Slack team - http:/ /slack.habitat.sh/ • Tutorial - https:/ /www.habitat.sh/tutorials/ • Public Package Depot - https:/ /app.habitat.sh/ • Habitat projects - https:/ /github.com/habitat-sh • Habitat Blog posts - https:/ /blog.chef.io/?s=habitat • Habitat Forums - https:/ /forums.habitat.sh/ https:/ /www.habitat.sh/