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 for defining cloud-native pipelines, making it easier to build, test, and deploy across multiple cloud providers or on-premises systems.
When working with Tekton, you might encounter a situation where a step in your TaskRun is unexpectedly skipped. This can be confusing, especially if you expect all steps to execute sequentially. The symptom is typically observed in the logs or the status of the TaskRun, where a step is marked as skipped.
TaskRun status shows a step as skipped.The primary reason a step in a TaskRun is skipped is due to conditions that are not met. Tekton allows you to define conditions that must be satisfied for a step to execute. If these conditions evaluate to false, the step is skipped.
Conditions in Tekton are used to control the execution flow of tasks. They are defined using WhenExpressions or Conditions resources. If the specified conditions are not met, the associated step or task will not run.
To resolve the issue of a skipped step, you need to review and adjust the conditions associated with the step. Here are the steps to diagnose and fix the problem:
Start by examining the logs of the TaskRun to identify which step was skipped and why. You can use the following command to view logs:
kubectl logs taskrun/ -c
Inspect the conditions defined in your TaskRun or Pipeline. Ensure that the conditions are correctly specified and that they reflect the intended logic. For example, verify any WhenExpressions or Conditions resources used.
Ensure that all input parameters required by the conditions are correctly passed and available. Missing or incorrect parameters can lead to conditions evaluating to false.
Manually test the conditions outside of the pipeline to ensure they produce the expected results. This can help identify logical errors in the condition expressions.
For more information on Tekton and handling conditions, you can refer to the following resources:
By following these steps and utilizing the resources provided, you should be able to diagnose and resolve the issue of skipped steps in your Tekton TaskRun.
(Perfect for DevOps & SREs)
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