A Guide to Tekton for Jenkins Users

Tekton Pipelines is an open-source project that focuses on providing a Kubernetes-native, lightweight, easy to manage serverless CI/CD framework. In this session, you will learn about Tekton Pipelines, how it works and see examples of how you can use it to build container-based CI/CD pipelines. We will also discuss what this means for Jenkins users.

Transcript

1. GENERAL DISTRIBUTION
   A Guide to Tekton for
   Jenkins Users
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2. GENERAL DISTRIBUTION
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   Governed by the Continuous Delivery Foundation
   Contributions from Google, Red Hat, Cloudbees, IBM, Pivotal and many more
   An open-source project for providing a set of shared and standard
   components for building Kubernetes-style CI/CD systems
   OPENSHIFT PIPELINES
   

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3. GENERAL DISTRIBUTION
   3
   Tekton Pipelines
   Kubernetes-native
   declarative
   pipelines
   Standard and
   portable to any
   Kubernetes
   platform
   Run pipelines in
   isolated containers
   with all required
   dependencies
   Serverless CI/CD
   with no single
   server to share
   and maintain
   Web, CLI, and
   Visual Studio
   Code and IDE
   plugins
   

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4. GENERAL DISTRIBUTION
   Steps
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   ● Run command or script in a container
   ● Kubernetes container spec
   ○ Env vars
   ○ Volumes
   ○ Config maps
   ○ Secrets
   TEKTON CONCEPTS
   - name: build
   image: maven:3.6.0-jdk-8-slim
   command: [“mvn”]
   args: [“install”]
   - name: parse-yaml
   image: python3
   script:|-
   #!/usr/bin/env python3
   ...
   

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5. GENERAL DISTRIBUTION
   Task
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   ● Defines a unit of work to be executed
   ● A list of steps to run sequentially
   ● Step containers run in the task pod
   ● Has inputs, outputs and parameters
   ● Workspaces and results for sharing data
   ● Can run independent of pipelines
   Task
   Step
   Step
   Step
   Step
   TEKTON CONCEPTS
   Example Tasks: Maven Install, AWS CLI, Kubectl Deploy, Security Scan, etc
   

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6. GENERAL DISTRIBUTION
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   Maven Task
   Example
   kind: Task
   metadata:
   name: maven
   spec:
   params:
   - name: goal
   type: string
   default: package
   steps:
   - name: mvn
   image: maven:3.6.0-jdk-8-slim
   command: [ mvn ]
   args: [ $(params.goal) ]
   

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7. GENERAL DISTRIBUTION
   Pipeline
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   ● Define Tasks execution order (graph)
   ● Inputs and parameters
   ● Retries tasks
   ● Conditional task execution
   ● Workspaces for sharing data between tasks
   ● Reusable across projects
   Pipeline
   Task
   Task
   Task
   Task
   TEKTON CONCEPTS
   

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8. GENERAL DISTRIBUTION
   kind: Pipeline
   metadata:
   name: deploy-pipeline
   spec:
   params:
   - name: app-git-repo
   tasks:
   - name: fetch-from-git
   taskRef:
   name: git-clone
   params:
   ...
   - name: skaffold-unit-tests
   runAfter: [fetch-from-git]
   taskRef:
   name: unit-tests
   ...
   - name: build-skaffold-app
   runAfter: [skaffold-unit-tests]
   taskRef:
   name: kaniko
   ...
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   Pipeline
   Example
   

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9. GENERAL DISTRIBUTION
   OpenShift Pipelines Architecture
   TEKTON CONCEPTS
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   PipelineResource
   Pipeline
   Task Task
   Define pipeline
   Run pipelines
   Pipeline Controllers
   (Tekton, ext, ...)
   pipeline-pod-a
   pipeline-pod-b
   PipelineRun
   TaskRun TaskRun
   pipeline-pod-c
   

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10. GENERAL DISTRIBUTION
    OpenShift Pipelines
    OPENSHIFT PIPELINES
    10
    OpenShift
    Dev Console
    OpenShift Pipelines
    Tekton CLI
    Kubernetes
    CI/CD
    Core
    Developer
    Tools
    CodeReady Workspaces
    (Eclipse Che)
    Tekton Pipelines
    Integrations
    Extensions
    Operator
    API
    Visual Studio Code
    Tasks
    

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11. GENERAL DISTRIBUTION
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    Jenkins Pipeline Tekton Pipeline
    pipeline {
    stages {
    stage('Git Clone') {
    steps { ... }
    }
    stage('Build App') {
    steps { ... }
    }
    stage('Test') {
    steps { ... }
    }
    stage('Code Analysis') {
    steps { ... }
    }
    }
    }
    kind: Pipeline
    spec:
    tasks:
    - name: git-clone
    - name: build-app
    - name: test
    - name: code-analysis
    

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12. GENERAL DISTRIBUTION
    12
    Jenkins Pipeline Tekton Pipeline
    pipeline {
    agent {
    label 'maven'
    }
    stages {
    stage ('Clone') {
    git url: 'https://github.com/...'
    }
    stage ('Build App') {
    withMaven(maven: 'maven-3') {
    sh "mvn clean verify"
    }
    }
    ...
    }
    kind: Pipeline
    spec:
    tasks:
    - name: git-clone
    taskRef:
    name: git-clone
    params:
    - name: url
    value: https://github.com/...
    workspaces:
    - name: app-workspace
    workspace: app-source
    - name: build-app
    taskRef:
    name: maven
    params:
    - name: GOALS
    value: ["clean", "verify"]
    runAfter:
    - git-clone
    workspaces:
    - name: app-workspace
    workspace: app-source
    

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13. GENERAL DISTRIBUTION
    Why Tekton?
    WHAT IS CI/CD?
    13
    Jenkins Tekton
    Designed for Virtual Machines Designed for Containers and Kubernetes
    Require IT Ops for CI engine maintenance Pipeline as a service with no Ops overhead
    Plugins shared across CI engine Pipelines fully isolated from each other
    Plugin dependencies with undefined update cycles Everything lifecycled as container images
    No interoperability with Kubernetes resources Native Kubernetes resources
    Admin manages persistence Platform manages persistence
    Config baked into CI engine container Configured via Kubernetes ConfigMaps
    

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14. GENERAL DISTRIBUTION
    linkedin.com/company/red-hat
    youtube.com/user/RedHatVideos
    facebook.com/redhatinc
    twitter.com/RedHat
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    Red Hat is the world’s leading provider of enterprise
    open source software solutions. Award-winning support,
    training, and consulting services make Red Hat a trusted
    adviser to the Fortune 500.
    Thank you
    

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