Alpine容器已装bash仍提示upload.sh未找到的问题咨询

报错信息：

/bin/sh: upload.sh: not found

Dockerfile内容 #

# bash on alpine

FROM quay.io/bashell/alpine:latest
WORKDIR /tmp

# make sure the package repository is up to date
RUN apk update \
 && apk upgrade \
 && apk add bash \
 && rm -rf /var/cache/*/* \
 && echo "" > /root/.ash_history

# change default shell from ash to bash
RUN sed -i -e "s/bin\/ash/bin\/bash/" /etc/passwd

ENV LC_ALL=en_US.UTF-8

# copy in upload.sh
COPY upload.sh .
RUN chmod +x upload.sh
RUN apk update && apk add curl git
RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.15.1/bin/linux/amd64/kubectl
RUN chmod u+x kubectl && mv kubectl /bin/kubectl

upload.sh脚本内容 #

#!/bin/bash
touch myfile.txt
FILE=$(pwd)
echo "File is available at $FILE/myfile.txt

容器内/tmp目录ls -la输出 #

/tmp # ls -la
total 16
drwxrwxrwt    1 root     root          4096 Sep 19 14:40 .
drwxr-xr-x    1 root     root          4096 Sep 20 10:14 ..
-rwxr-xr-x    1 root     root            88 Sep 19 14:33 upload.sh

已尝试的排查操作 #

• 进入容器确认bash路径为/bin/bash；
• 检查upload.sh格式：换行符为LF，编码为UTF-8；
• 脚本中改用#!/bin/sh（无论是否安装bash），仍报错；
• 脚本中改用#!/bin/ash（无论是否安装bash），仍报错。

更新信息 #

进入容器执行sh upload.sh可成功运行脚本。

K8S部署配置疑问 #

实际场景是在K8S环境中运行该容器及脚本，部署配置如下，请问该配置是否正确？还是需要在构建Dockerfile时处理此问题？

apiVersion: v1
kind: Pod
metadata:
  name: alpine
  namespace: labs
spec:
  serviceAccountName: alpine
  containers:
  - image: myuser/alpine-kubectl
    volumeMounts:
            - name: datadir
              mountPath: /tmp
    command:
      - sh
      - "-c"
      - "./upload.sh && sleep 100000000"
    imagePullPolicy: IfNotPresent
    name: alpine
    
  restartPolicy: Always
  volumes:
        - name: datadir
          persistentVolumeClaim:
            claimName: alpine

内容的提问来源于stack exchange，提问作者Golide