Cloud-native pipeline with Tekton

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

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

• Kubernetes Style Resources ⇔ Tekton Custom Resources • Declaring
CI/CD Pipelines ⇔ Tekton Controllers Manages State

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

Kubernetes Resource Model API Operation State Handles

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

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

State Controllers • Split System State into small pieces •
Separate Controllers manage each piece Resource State Controller Events

• Split System State into small pieces • Separate Controllers
manage each piece Resource State Controller Events Yes!, we can add custom controllers :) State Controllers

Tekton Pipeline Custom Resources • Task • PipelineResource • Pipeline
• TaskRun • PipelineRun

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

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

Task Input and Outputs • Input • PipelineResources • Parameters
• Output • PipelineResources

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

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

Pipeline

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

TaskRun

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

CI/CD with Tekton Pipeline on Kubernetes Demo

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

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

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

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)

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

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

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

Cloud-native pipeline with Tekton

Cloud-native pipeline with Tekton

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