minikube上的kubernetes无法输出到文件 [英] kubernetes on minikube can't output to file

问题描述

我在Ubuntu 18上使用minikube并运行一个kubernetes作业，该作业只需挂载dir并使用此yaml文件将某些内容输出到文件

I am using minikube on Ubuntu 18 and running a kubernetes job that should simply mount a dir and output something to a file using this yaml file

apiVersion: batch/v1
kind: Job
metadata:
  name: pi13
spec:
  template:
    spec:
      containers:
      - name: pi
        image: perl
        command: ["/bin/echo"]
        args: ["1 >> /data/text12.txt"]
        volumeMounts:
        - mountPath: /data
          name: data
      volumes:
        - name: data
          hostPath:
            path: /home/user/data
      restartPolicy: Never
  backoffLimit: 1

它运行良好，并在仪表板中提供了此输出

It runs fine and gives this output in the dashboard

1 >>/data/shai12.txt

1 >> /data/shai12.txt

但是不向文件写入任何内容(运行完成后我尝试在主机上读取它，但是没有任何反应)

But writes nothing to the file (I try to read it on the host after the run is completed but nothing happens)

我在这里想念什么?

推荐答案

您的工作应该像这样:

apiVersion: batch/v1
kind: Job
metadata:
  name: pi13
spec:
  template:
    spec:
      containers:
      - name: pi
        image: perl
        command: [ "sh", "-c"]
        args: ["echo 1 >> /data/text12.txt"]
        volumeMounts:
        - mountPath: /data
          name: data
      volumes:
        - name: data
          hostPath:
            path: /tmp/data
      restartPolicy: Never
  backoffLimit: 1

在您的情况下，您将整个1 >> /data/text12.txt传递给echo命令，结果将显示1 >> /data/text12.txt您可以在作业日志中检查的内容.

In your case you pass whole 1 >> /data/text12.txt to echo command and as results it prints 1 >> /data/text12.txt what you can check in job logs.

hostPath创建目录/data，所以这就是找到它的原因.

hostPath creates directory /data, so this is why you found it.

希望对您有帮助.

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