I want to use parameter with default value.

[jeongsik-woo]

Hi

I am beginner of argo workflow.

I created yaml like this.

apiVersion: argoproj.io/v1alpha1
kind: CronWorkflow
metadata:
  name: batch-dev
spec:
  workflowMetadata:
    labels:
      name: batch-dev
      stage: dev
  schedule: "0 */6 * * *"
  concurrencyPolicy: "Forbid"
  arguments:
    parameters:
      - name: forceGenerateCreatives
        value: false
      - name: uid
        value: ''
  workflowSpec:
    serviceAccountName: admin
    entrypoint: batch
    templates:
    - name: batch
      retryStrategy:
        limit: "2"
        retryPolicy: "Always"
      container:
        image: 'image_url'
        args: ["{{workflow.parameters.forceGenerateCreatives}}", "{{workflow.paramters.uid}}"]

and I try to start cron workflow on web-ui.

But it failed.

Can you figure out why this happened?

Also, I'm wondering if it's correct to always write the value of the parameter when submitting in web-ui, even though I set the default value in yaml.

And how can I set null for the default value?

[wesleyscholl]

@jeongsik-woo

arguments and parameters are not in the CronWorkflowSpec.

https://argo-workflows.readthedocs.io/en/latest/fields/#cronworkflowspec

However, moving arguments and parameters inside workflowSpec and separating the arguments would work.

apiVersion: argoproj.io/v1alpha1
kind: CronWorkflow
metadata:
  name: batch-dev
spec:
  schedule: "0 */6 * * *"
  concurrencyPolicy: "Forbid"
  workflowSpec:
    serviceAccountName: admin
    entrypoint: batch
    arguments:
      parameters:
        - name: forceGenerateCreatives
          value: "false"
        - name: uid
          value: ""
    templates:
      - name: batch
        retryStrategy:
          limit: "2"
          retryPolicy: "Always"
        container:
          image: 'image_url'
          args:
            - "{{workflow.parameters.forceGenerateCreatives}}"
            - "{{workflow.parameters.uid}}"

https://argo-workflows.readthedocs.io/en/latest/fields/#workflowspec