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Building CI/CD Systems Using Tekton

You're reading from  Building CI/CD Systems Using Tekton

Product type Book
Published in Sep 2021
Publisher Packt
ISBN-13 9781801078214
Pages 278 pages
Edition 1st Edition
Languages
Author (1):
Joel Lord Joel Lord
Profile icon Joel Lord

Table of Contents (20) Chapters

Preface 1. Section 1: Introduction to CI/CD
2. Chapter 1: A Brief History of CI/CD 3. Chapter 2: A Cloud-Native Approach to CI/CD 4. Section 2: Tekton Building Blocks
5. Chapter 3: Installation and Getting Started 6. Chapter 4: Stepping into Tasks 7. Chapter 5: Jumping into Pipelines 8. Chapter 6: Debugging and Cleaning Up Pipelines and Tasks 9. Chapter 7: Sharing Data with Workspaces 10. Chapter 8: Adding when Expressions 11. Chapter 9: Securing Authentication 12. Section 3: Tekton Triggers
13. Chapter 10: Getting Started with Triggers 14. Chapter 11: Triggering Tekton 15. Section 4: Putting It All Together
16. Chapter 12: Preparing for a New Pipeline 17. Chapter 13: Building a Deployment Pipeline 18. Assessments 19. Other Books You May Enjoy

Using when expressions with parameters

For this first example, you will build a guess-the-number type of game. When you start the pipeline, it will ask you for a number as a parameter. In the pipeline, a when expression will be used to compare this parameter's value with a hardcoded number. If the number is a match, it will output a message saying that you guessed the number accurately. The logger task that you built in Chapter 5, Jumping into Pipelines, will be used in this pipeline to output the messages. For convenience, here is the task definition:

apiVersion: tekton.dev/v1beta1 
kind: Task 
metadata: 
 name: logger 
spec: 
 params: 
   - name: text 
     type: string 
 steps: 
   - name: log 
     image: registry.access.redhat.com/ubi8/ubi-minimal 
     script: | 
       DATE=$(date +%d/%m/%Y\ %T) 
       echo [$DATE] - $(params...
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