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Conditional checking in Argo workflow

 1 year ago
source link: https://donghao.org/2022/08/19/conditional-checking-in-argo-workflow/
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Conditional checking in Argo workflow

My company has been using Argo for executing workflow for more than three years. I knew every step in the Argo workflow could be controlled by when expression, like this:

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: example-
spec:
  entrypoint: first-step
  arguments:
  - parameters:
    - - name: 'COLOR',
        value: std.extVar('COLOR'),
  templates:
  - name: first-stage
    steps:
    # flip a coin
    - - name: first-step
        template: step-first
        when: '{{workflow.parameters.COLOR}} == red',
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: example-
spec:
  entrypoint: first-step
  arguments:
  - parameters:
    - - name: 'COLOR',
        value: std.extVar('COLOR'),
  templates:
  - name: first-stage
    steps:
    # flip a coin
    - - name: first-step
        template: step-first
        when: '{{workflow.parameters.COLOR}} == red',

What if I want to check more than one condition? Just use “&&” as “and”, “||” as “or”:

...
  - name: first-stage
    steps:
    # flip a coin
    - - name: first-step
        template: step-first
        when: '{{workflow.parameters.COLOR}} == red || {{workflow.parameters.COLOR}} == blue',
...
  - name: first-stage
    steps:
    # flip a coin
    - - name: first-step
        template: step-first
        when: '{{workflow.parameters.COLOR}} == red || {{workflow.parameters.COLOR}} == blue',

Reference

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August 19, 2022 - 3:54 RobinDong develop
Argo
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