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Hdfs Artifact

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,
    HDFSArtifact,
    Step,
    Steps,
    Workflow,
)

with Workflow(generate_name="hdfs-artifact-", entrypoint="artifact-example") as w:
    hello_world_to_file = Container(
        name="hello-world-to-file",
        command=["sh", "-c"],
        args=["echo hello world | tee /tmp/hello_world.txt"],
        image="busybox",
        outputs=[
            HDFSArtifact(
                name="hello-art",
                path="/tmp/hello_world.txt",
                addresses=[
                    "my-hdfs-namenode-0.my-hdfs-namenode.default.svc.cluster.local:8020",
                    "my-hdfs-namenode-1.my-hdfs-namenode.default.svc.cluster.local:8020",
                ],
                hdfs_path="/tmp/argo/foo",
                hdfs_user="root",
                force=True,
            )
        ],
    )
    print_message_from_hdfs = Container(
        name="print-message-from-hdfs",
        image="alpine:latest",
        command=["sh", "-c"],
        args=["cat /tmp/message"],
        inputs=[
            HDFSArtifact(
                name="message",
                path="/tmp/message",
                addresses=[
                    "my-hdfs-namenode-0.my-hdfs-namenode.default.svc.cluster.local:8020",
                    "my-hdfs-namenode-1.my-hdfs-namenode.default.svc.cluster.local:8020",
                ],
                hdfs_path="/tmp/argo/foo",
                hdfs_user="root",
                force=True,
            )
        ],
    )

    with Steps(name="artifact-example") as s:
        Step(name="generate-artifact", template=hello_world_to_file)
        Step(
            name="consume-artifact",
            template=print_message_from_hdfs,
            arguments=[Artifact(name="message", from_="{{steps.generate-artifact.outputs.artifacts.hello-art}}")],
        )

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apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: hdfs-artifact-
spec:
  entrypoint: artifact-example
  templates:
  - name: hello-world-to-file
    container:
      image: busybox
      args:
      - echo hello world | tee /tmp/hello_world.txt
      command:
      - sh
      - -c
    outputs:
      artifacts:
      - name: hello-art
        path: /tmp/hello_world.txt
        hdfs:
          force: true
          hdfsUser: root
          path: /tmp/argo/foo
          addresses:
          - my-hdfs-namenode-0.my-hdfs-namenode.default.svc.cluster.local:8020
          - my-hdfs-namenode-1.my-hdfs-namenode.default.svc.cluster.local:8020
  - name: print-message-from-hdfs
    container:
      image: alpine:latest
      args:
      - cat /tmp/message
      command:
      - sh
      - -c
    inputs:
      artifacts:
      - name: message
        path: /tmp/message
        hdfs:
          force: true
          hdfsUser: root
          path: /tmp/argo/foo
          addresses:
          - my-hdfs-namenode-0.my-hdfs-namenode.default.svc.cluster.local:8020
          - my-hdfs-namenode-1.my-hdfs-namenode.default.svc.cluster.local:8020
  - name: artifact-example
    steps:
    - - name: generate-artifact
        template: hello-world-to-file
    - - name: consume-artifact
        template: print-message-from-hdfs
        arguments:
          artifacts:
          - name: message
            from: '{{steps.generate-artifact.outputs.artifacts.hello-art}}'

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