Bringing Habitat awesomeness to Kubernetes

Habitat is a tool to build platform-independent artifacts. In this talk I will give an introduction to Habitat & Kubernetes and then talk about why we built the habitat operator and how it helps to deploy and manage habitat artifacts in a Kubernetes cluster.t

Transcript

1. Bringing Habitat awesomeness to Kubernetes DevConf India 5th August, 2018
2. Hi, I'm Indra Indradhanush Gupta Software Engineer, Kinvolk Github: indradhanush Twitter: indradhanush92 Email: indra@kinvolk.io
3. The Deep-stack Kubernetes Experts Engineering services and products for Kubernetes, containers, process management and Linux user-space + kernel Blog: kinvolk.io/blog Github: kinvolk Twitter: kinvolkio Email: hello@kinvolk.io Kinvolk
5. What we will talk about? 1. What is Habitat? 2. What is Kubernetes? 3. What is a Kubernetes operator? 4. What we did with the Habitat operator?
6. What we will talk about? 1. What is Habitat? 2. What is Kubernetes? 3. What is a Kubernetes operator? 4. What we did with the Habitat operator?
7. What we will talk about? 1. What is Habitat? 2. What is Kubernetes? 3. What is a Kubernetes operator? 4. What we did with the Habitat operator?
8. What we will talk about? 1. What is Habitat? 2. What is Kubernetes? 3. What is a Kubernetes operator? 4. What we did with the Habitat operator?
9. What we will talk about? 1. What is Habitat? 2. What is Kubernetes? 3. What is a Kubernetes operator? 4. What we did with the Habitat operator?
10. What is Habitat?
11. Habitat ❏ Automation tool for building and deploying your apps ❏ Habitat plan file (plan.sh) ❏ Habitat artifacts (.hart)
12. plan.sh
13. Habitat Builder plan.sh
14. Habitat Builder plan.sh Push artifact (.hart)
15. Habitat Builder plan.sh Push artifact (.hart) https://bldr.habitat.sh/ Builder Depot
16. Habitat Builder plan.sh hab start origin/pkg-name Push artifact (.hart) https://bldr.habitat.sh/ Builder Depot
17. Habitat Builder plan.sh hab start origin/pkg-name Supervisor Push artifact (.hart) https://bldr.habitat.sh/ Builder Depot
18. Supervisor Ring
19. Supervisor Ring hab start origin/pkg-name
20. Supervisor Ring --topology leader hab start origin/pkg-name 1
21. Supervisor Ring --topology leader hab start origin/pkg-name 2 1 --topology leader --peer 192.168.10.10
22. Supervisor Ring --topology leader --topology leader --peer 192.168.10.10 hab start origin/pkg-name 2 1 3 --topology leader --peer 192.168.10.10
23. Supervisor Ring --topology leader --topology leader --peer 192.168.10.10 hab start origin/pkg-name 2 1 3 --topology leader --peer 192.168.10.10
24. Configuration Updates default.toml
25. Configuration Updates default.toml Supervisor user.toml
26. Configuration Updates Supervisor default.toml /hab/user/<service-name>/config/user.toml user.toml
27. Habitat https://www.habitat.sh/ https://github.com/habitat-sh/habitat
28. What is Kubernetes?
29. Kubernetes ❏ Cluster manager ❏ Scheduler ❏ Orchestrator
30. Kubernetes ❏ Cluster manager ❏ Scheduler ❏ Orchestrator ...for containerized applications
31. Kubernetes Master Node Node kubectl apply -f manifest.yaml
32. Kubernetes Node
33. Database Web Server Pods Kubernetes
34. pod.yaml
35. Deployments Kubernetes
36. Deployments ❏ Replicas ❏ Rollbacks ❏ Autoscaling
37. StatefulSets ❏ Similar to Deployments ❏ Persistent storage (redis) ❏ Unique network identifiers ❏ Ordered deployment and deletion
38. Namespaces Deployments Deployments Kubernetes
39. Pod Volume Kubernetes Data Volume Mount
40. Kubernetes https://kubernetes.io https://github.com/kubernetes/kubernetes/
41. What is a Kubernetes operator?
42. Kubernetes Operator
43. Kubernetes Operator Operational Logic
44. What we did with the Habitat operator?
45. Habitat Operator Habitat artifact (.hart)
46. Habitat Operator Habitat artifact (.hart)
47. Habitat Operator Habitat artifact (.hart) Kubernetes Pod
48. Habitat Operator Kubernetes Custom Resource Definition (CRD): Habitat The source of truth
49. Habitat Operator
50. user.toml is stored as a Kubernetes Secret Habitat Operator Kubernetes Secret name: user-toml data: user.toml: cG9ydCA9IDQ0NDQ=
51. The secret name is referred in Habitat CRD Habitat Operator Habitat CRD configSecretName: user-toml
52. Kubernetes Secret is placed in a Kubernetes Volume Habitat Operator Kubernetes Secret /hab/user/pkg-name/config/user.toml
53. v1beta1: Kubernetes Deployments Habitat Operator Habitat artifact (.hart) Deployment
54. Habitat Operator v1beta2: Kubernetes StatefulSets Habitat artifact (.hart) StatefulSet
55. Supervisor Ring --topology leader --topology leader --peer 192.168.10.10 --topology leader --peer 192.168.10.10 hab start origin/pkg-name 1 3 2
56. Habitat Supervisor --peer-watch-file ❏ Path to a config file ❏ Contains IP addresses of peers ❏ Created and updated by the Operator ❏ IP added when new pods are created ❏ Mounted on the pod for supervisors to access
57. Habitat Operator --peer-watch-file --peer-watch-file --peer-watch-file
58. Habitat Operator DEMO May the demo Gods be with us!
59. Habitat Operator https://github.com/habitat-sh/habitat-operator
60. Indradhanush Gupta Github: indradhanush Twitter: indradhanush92 Email: indra@kinvolk.io Kinvolk Blog: kinvolk.io/blog Github: kinvolk Twitter: kinvolkio Email: hello@kinvolk.io Thank you!
61. Questions? #kubernetes on https://habitat-sh.slack.com