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Artifact Passing

Note

This example is a replication of an Argo Workflow example in Hera. The upstream example can be found here.

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from hera.workflows import Artifact, Container, Step, Steps, Workflow

with Workflow(generate_name="artifact-passing-", entrypoint="artifact-example") as w:
    hello_world_to_file = Container(
        name="hello-world-to-file",
        image="busybox",
        command=["sh", "-c"],
        args=["sleep 1; echo hello world | tee /tmp/hello_world.txt"],
        outputs=[Artifact(name="hello-art", path="/tmp/hello_world.txt")],
    )
    print_message_from_file = Container(
        name="print-message-from-file",
        image="alpine:latest",
        command=["sh", "-c"],
        args=["cat /tmp/message"],
        inputs=[Artifact(name="message", path="/tmp/message")],
    )

    with Steps(name="artifact-example") as s:
        gen_step = Step(name="generate-artifact", template=hello_world_to_file)
        Step(
            name="consume-artifact",
            template=print_message_from_file,
            arguments=gen_step.get_artifact("hello-art").with_name("message"),
        )

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apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: artifact-passing-
spec:
  entrypoint: artifact-example
  templates:
  - name: hello-world-to-file
    container:
      image: busybox
      args:
      - sleep 1; echo hello world | tee /tmp/hello_world.txt
      command:
      - sh
      - -c
    outputs:
      artifacts:
      - name: hello-art
        path: /tmp/hello_world.txt
  - name: print-message-from-file
    container:
      image: alpine:latest
      args:
      - cat /tmp/message
      command:
      - sh
      - -c
    inputs:
      artifacts:
      - name: message
        path: /tmp/message
  - name: artifact-example
    steps:
    - - name: generate-artifact
        template: hello-world-to-file
    - - name: consume-artifact
        template: print-message-from-file
        arguments:
          artifacts:
          - name: message
            from: '{{steps.generate-artifact.outputs.artifacts.hello-art}}'

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