python - Kubernetespodoperator如何使用cmds或者cmds和arguments运行多条命令

Question

我正在使用 GCP composer 运行算法，在流的末尾我想运行一个任务，该任务将执行多个操作，将文件和文件夹从卷复制和删除到存储桶，我正在尝试执行这些操作通过 kubernetespodoperator 复制和删除操作。我很难找到使用“cmds”运行多个命令的正确方法我也尝试过使用“cmds”和“arguments”。这是我的 KubernetesPodOperator 以及我尝试的命令和参数组合:

post_algo_run = kubernetes_pod_operator.KubernetesPodOperator(
    task_id="multi-coher-post-operations",
    name="multi-coher-post-operations",
    namespace="default",
    image="google/cloud-sdk:alpine",
    
    ### doesn't work ###
    cmds=["gsutil", "cp", "/data/splitter-output\*.csv",  "gs://my_bucket/data" , "&" , "gsutil", "rm", "-r", "/input"], 
    #Error:
        #[2022-01-27 09:31:38,407] {pod_manager.py:197} INFO - CommandException: Destination URL must name a directory, bucket, or bucket
        #[2022-01-27 09:31:38,408] {pod_manager.py:197} INFO - subdirectory for the multiple source form of the cp command.
    ####################

    ### doesn't work ###
    # cmds=["gsutil", "cp", "/data/splitter-output\*.csv",  "gs://my_bucket/data ;","gsutil", "rm", "-r", "/input"],
        # [2022-01-27 09:34:06,865] {pod_manager.py:197} INFO - CommandException: Destination URL must name a directory, bucket, or bucket
        # [2022-01-27 09:34:06,866] {pod_manager.py:197} INFO - subdirectory for the multiple source form of the cp command.
    ####################

    ### only preform the first command - only copying ###
    # cmds=["bash", "-cx"],
    # arguments=["gsutil cp /data/splitter-output\*.csv gs://my_bucket/data","gsutil rm -r /input"],                                    
        # [2022-01-27 09:36:09,164] {pod_manager.py:197} INFO - + gsutil cp '/data/splitter-output*.csv' gs://my_bucket/data
        # [2022-01-27 09:36:11,200] {pod_manager.py:197} INFO - Copying file:///data/splitter-output\Coherence Results-26-Jan-2022-1025Part1.csv [Content-Type=text/csv]...
        # [2022-01-27 09:36:11,300] {pod_manager.py:197} INFO - / [0 files][    0.0 B/ 93.0 KiB]                                                
        # / [1 files][ 93.0 KiB/ 93.0 KiB]
        # [2022-01-27 09:36:11,302] {pod_manager.py:197} INFO - Operation completed over 1 objects/93.0 KiB.
        # [20   22-01-27 09:36:12,317] {kubernetes_pod.py:459} INFO - Deleting pod: multi-coher-post-operations.d66b4c91c9024bd289171c4d3ce35fdd
    ####################


    volumes=[
        Volume(
            name="nfs-pvc",
            configs={
                "persistentVolumeClaim": {"claimName": "nfs-pvc"}
            },
        )
    ],
    volume_mounts=[
        VolumeMount(
            name="nfs-pvc",
            mount_path="/data/",
            sub_path=None,
            read_only=False,
        )
    ],
)

Answer 1

对于您的第一个命令，您需要确保在您的 docker 中您能够到达允许您找到文件 /data/splitter-output\*.csv 的工作目录。 p>

["gsutil", "cp", "/data/splitter-output*.csv", "gs://my_bucket/data"]

您可以使用 docker RUN 在您的 docker 镜像上测试您的命令，这样您就可以验证您是否正确提供了命令。

在第二个语句中，如果您再次引用 docker 镜像中的路径，请使用 run 对其进行测试。如果您指的是谷歌存储，则必须提供完整路径。

["gsutil", "rm", "-r", "/input"]

值得一提的是，一旦容器开始运行，ENTRYPOINT 就会运行，如 understand how cmd and entrypoint interact 中所述。 .如评论中所述，如果您查看 code cmds 它取代了 docker image ENTRYPOINT。它还建议遵循 Define a Command and Arguments for a Container 的指南。