Скачать или смотреть Resolving the Issue of Argo Workflow Not Passing Input Parameters to WorkflowTemplate

Discover how to effectively pass input parameters through `Argo Workflows` by correcting configuration issues in nested WorkflowTemplates.
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Resolving the Issue of Argo Workflow Not Passing Input Parameters to WorkflowTemplate

If you've been working with Argo Workflows, you may have encountered challenges in passing input parameters between WorkflowTemplates. This post addresses a common issue where input parameters are not correctly passed down to nested templates, leading to execution errors. Let's dive deep into how to resolve this problem and ensure your workflows run smoothly.

The Problem: Input Parameters Not Being Passed

When dealing with complex workflows, it's common to break them down into separate WorkflowTemplates. In this scenario, we have an outer-template that orchestrates steps, and an inner-template that defines the job to execute in a container. When a request (in request.yaml) is submitted, it successfully passes the parameter message to both templates but encounters an error when it reaches the inner template. Specifically, the system reports:

[[See Video to Reveal this Text or Code Snippet]]

This message indicates that while the outer-template was correctly configured to accept input, it did not pass the message parameter to inner-template. Let's break down how to fix this issue.

Solution: Properly Set Argument Values in Your Templates

1. Understanding Your Current Configuration

In the provided workflow templates, the outer-template includes two steps that reference the inner-template. However, the message parameter hasn't been fully specified in each step. Here’s a summary of what is going wrong:

The message parameter is being passed, but lacks the necessary value definitions for the inner-template steps.

This leads to failure, as inner-template is looking for a value it never receives.

2. Updating the Outer Template Steps

To resolve the issue, you need to ensure that both steps in the outer-template explicitly set the value for the message parameter when invoking the inner-template. Here’s how you can update your outer-template to include the necessary value settings:

[[See Video to Reveal this Text or Code Snippet]]

3. Confirming Parameter Pass-Through

By including value: "{{inputs.parameters.message}}" in both step-1 and step-2, you are now directing the workflow to pass the message input parameter from the outer-template directly to the inner-template. This alignment ensures that the inner job can execute with the expected input.

4. Testing Your Changes

After making these adjustments, it's crucial to test your workflow again. Submit your request.yaml to verify that the parameter now flows correctly from the outer layer to the inner job, and that all steps execute without errors.

Conclusion

Passing input parameters accurately in Argo Workflows can be tricky but essential for successful execution. By ensuring that each step has explicit values for required parameters, you can prevent common errors and improve the reliability of your workflows. Remember, keeping templates well-organized and clearly specifying parameter values is key to mastering Argo Workflows. Happy coding!