Cloud-Native CI/CD on Kubernetes with Tekton Pipelines

1. Build CloudNative CI/CD Pipelines with Tekton on Kubernetes Nikhil Thomas Software Engineer Red Hat Github: nikhil-thomas Twitter: nikhilthomasmwb YouTube link to this talk: https://www.youtube.com/watch?v=-ji5Z0qJmJs

2. Contents ● Meet our CI/CD Pipeline ● Introduction to Tekton Pipeline ● Pipelines Demo

3. Sample App Web Service 1 Web Service 2 http request http response http request http response

4. CI/CD Pipeline Build Web Service 1 (Task) Build Web Service 2 (Task) Deploy Web Service 1 (Task) Deploy Web Service 2 (Task) container image (PipelineResource) container image (PipelineResource) (Pipeline) source code (PipelineResource) source code (PipelineResource) execution order inputs

6. ● Kubernetes Style Resources ⇔ Tekton Custom Resources ● Declaring CI/CD Pipelines ⇔ Tekton Controllers Manages State

7. “Kubernetes resource model is coming to an API near you!” - Kubernetes-style APIs of the Future, Daniel Smith KubeCon CloudNativeCon Europe, May 2018

8. Kubernetes Resource Model API Operation State Handles

9. API Operations Resources ● Pods ● Deployments ● Service ● Node ● ... Verbs ● Get ● List ● Create ● Update ● Delete ● Patch ● Watch

10. ● Pods ● Deployments ● Service ● Node ● … ● Custom Resources ● Get ● List ● Create ● Update ● Delete ● Patch ● Watch API Operations Resources Verbs

11. State Controllers ● Split System State into small pieces ● Separate Controllers manage each piece Resource StateController Events

12. ● Split System State into small pieces ● Separate Controllers manage each piece Resource StateController Events Yes!, we can add custom controllers :) State Controllers

16. Tekton Pipeline Custom Resources ● Task ● PipelineResource ● Pipeline ● TaskRun ● PipelineRun

18. Task ● Defines the work that needs to be executed ● Every task runs as a Pod ● Contains multiple steps

19. Steps (in a Task) ● Series of commands ● Sequentially executed by the task. ● Each step in a task runs as a container Task step step step

20. Task Input and Outputs ● Input ● PipelineResources ● Parameters ● Output ● PipelineResources

22. PipelineResource ● Predefined input/output ● System defined resource types ready to use ● Decoupled and reusable ● Commonly used PipelineResource types: image, git

24. Pipeline ● Defines list of Tasks to execute ● Expresses Task order (graph) ● Links Tasks inputs and outputs Pipeline Task Task Task Task Task

25. Pipeline

26. TaskRun ● Instance of a defined Task ● Binds the inputs/outputs to a Task ● Sets values to the parameters ● Executes Task steps

27. TaskRun

28. TaskRun

29. TaskRun

30. TaskRun

31. PipelineRun ● Instance of a defined Pipeline ● Binds inputs/outputs to a Pipeline ● Execute the Tasks in the Pipeline ● Create the TaskRuns for each Task and collect the results

32. CI/CD with Tekton Pipeline on Kubernetes Demo

33. Sample App Web Service 1 Web Service 2 http request http response http request http response

35. Build Task Pull source code (Step) Build container Image (Step) Push container image (Step) (Task) source code (PipelineResource) container image (PipelineResource) execution order inputs

36. Deployment Task Update Deployment manifest (Step) Create Deployment (Step) (Task) container image (PipelineResource) Functional web services execution order inputs

37. source code (PipelineResource) source code (PipelineResource) execution order inputs CI/CD Pipeline Build Web Service 1 (Task) Build Web Service 2 (Task) Deploy Web Service 1 (Task) Deploy Web Service 2 (Task) container image (PipelineResource) container image (PipelineResource) (Pipeline)

42. tkn (Tekton CLI) Available Commands ● task : Manage tasks ● taskrun : Manage taskruns ● pipeline : Manage pipelines ● pipelinerun : Manage pipelineruns ● completion : Prints shell completion scripts ● help : Help about any command ● version : Prints version information

43. tkn task Available Sub-Commands ● list : Lists tasks in a namespace tkn taskrun Available Sub-Commands ● list : Lists taskruns in a namespace ● logs : Displays taskrun logs

44. tkn pipeline Available Sub-Commands ● describe : Describes a pipeline in a namespace ● list : Lists pipelines in a namespace ● start : Start pipelines by creating a pipelinerun in a namespace tkn pipelinerun Available Sub-Commands ● describe : Describe a pipelinerun in a namespace ● list : Lists pipelineruns in a namespace ● logs : Display pipelinerun logs

45. Pipelines Operator

46. Pipelines Operator provides `As a Service Experience`

47. ● Kubernetes Style Resources ⇔ Tekton Resources ⇔ API operations ● Declaring CI/CD Pipelines ⇔ Tekton Controllers ⇔ State Management

48. ∙ Tekton: https://github.com/tektoncd ∙ Tekton Pipeline: https://github.com/tektoncd/pipeline ∙ Tekton CLI: https://github.com/tektoncd/cli ∙ Kubernetes Operator for Tekton Pipelines: https://github.com/openshift/tektoncd-pipeline-operator ∙ Tekton Pipelines on Openshift: https://github.com/openshift/tektoncd-pipeline-operator ∙ Tekton Catalog: https://github.com/tektoncd/catalog

49. Thank you

Cloud-Native CI/CD on Kubernetes with Tekton Pipelines

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