Tekton Missing input resource

What is Tekton Missing input resource

Understanding Tekton: A Brief Overview

Tekton is a powerful and flexible open-source framework for creating CI/CD systems. It allows developers to define and run continuous integration and delivery pipelines in Kubernetes. Tekton provides a set of Kubernetes Custom Resources (CRDs) that enable you to define pipelines, tasks, and resources, which can be executed in a Kubernetes cluster.

Identifying the Symptom: Missing Input Resource

When working with Tekton, you might encounter an error indicating a 'Missing input resource'. This typically manifests when a TaskRun or PipelineRun is executed without the necessary input resources defined in the specification. This can halt the execution of your pipeline, leading to incomplete or failed runs.

Exploring the Issue: Why Does This Happen?

The 'Missing input resource' issue occurs when a TaskRun or PipelineRun is initiated without specifying all the required resources. In Tekton, tasks often depend on input resources such as Git repositories, images, or other artifacts. If these inputs are not provided, the task cannot proceed as expected.

Common Causes

Omission of input resources in the TaskRun or PipelineRun specification. Typographical errors in resource names or references. Misconfiguration of resource bindings in the pipeline.

Steps to Resolve the Missing Input Resource Issue

To resolve this issue, follow these steps to ensure that all necessary input resources are correctly specified:

Step 1: Review Your Task or Pipeline Specification

Begin by examining the Task or Pipeline specification to identify the required input resources. Ensure that each resource is correctly defined and referenced. For example:

apiVersion: tekton.dev/v1beta1kind: Taskmetadata: name: example-taskspec: resources: inputs: - name: source-repo type: git

Step 2: Verify TaskRun or PipelineRun Configuration

Check the TaskRun or PipelineRun configuration to ensure that all required resources are provided. Here is an example of a TaskRun:

apiVersion: tekton.dev/v1beta1kind: TaskRunmetadata: name: example-taskrunspec: taskRef: name: example-task resources: inputs: - name: source-repo resourceRef: name: my-git-resource

Step 3: Correct Any Errors

If you find any discrepancies or missing resources, update the configuration to include the necessary input resources. Ensure that resource names match exactly between the Task and TaskRun or PipelineRun.

Additional Resources

For more information on Tekton and managing resources, consider visiting the following links:

Tekton Resources Documentation Tekton Pipelines GitHub Repository Kubernetes Custom Resources

By following these steps and ensuring all input resources are correctly specified, you can resolve the 'Missing input resource' issue and ensure your Tekton pipelines run smoothly.