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Conditional

This example showcases conditional execution on success, failure, and error

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from hera.workflows import DAG, Workflow, script


@script()
def random():
    import random

    p = random.random()
    if p <= 0.5:
        raise Exception("failure")
    print("success")


@script()
def success():
    print("success")


@script()
def failure():
    print("failure")


with Workflow(generate_name="conditional-", entrypoint="d") as w:
    with DAG(name="d"):
        r = random()
        s = success()
        f = failure()

        r.on_success(s)
        r.on_failure(f)

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apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: conditional-
spec:
  entrypoint: d
  templates:
  - name: d
    dag:
      tasks:
      - name: random
        template: random
      - name: success
        depends: random.Succeeded
        template: success
      - name: failure
        depends: random.Failed
        template: failure
  - name: random
    script:
      image: python:3.9
      source: |-
        import os
        import sys
        sys.path.append(os.getcwd())
        import random
        p = random.random()
        if p <= 0.5:
            raise Exception('failure')
        print('success')
      command:
      - python
  - name: success
    script:
      image: python:3.9
      source: |-
        import os
        import sys
        sys.path.append(os.getcwd())
        print('success')
      command:
      - python
  - name: failure
    script:
      image: python:3.9
      source: |-
        import os
        import sys
        sys.path.append(os.getcwd())
        print('failure')
      command:
      - python

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