Dockerfile 无法运行 cp 命令在容器内移动文件

Question

您好，我正在尝试下载容器内的文件并将该文件移动到容器内的特定位置。

RUN wget https://storage.googleapis.com/hadoop-lib/gcs/gcs-connector-latest-hadoop2.jar 
RUN cp gcs-connector-latest-hadoop2.jar /opt/spark-2.2.1-bin-hadoop2.7/jars/
RUN cp /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf.template /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf
RUN echo "spark.hadoop.google.cloud.auth.service.account.enable true" > /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf

但这失败了，错误如下：

Step 44/46 : RUN cp gcs-connector-latest-hadoop2.jar /opt/spark-2.2.1-bin-hadoop2.7/jars/
 ---> Running in 8c81d9871377
cp: cannot create regular file '/opt/spark-2.2.1-bin-hadoop2.7/jars/': No such file or directory
The command '/bin/sh -c cp gcs-connector-latest-hadoop2.jar /opt/spark-2.2.1-bin-hadoop2.7/jars/' returned a non-zero code: 1

EDIT-1 Error Screenshot

我已经尝试了提到的解决方案，现在我收到以下错误：

删除中间容器 e885431017e8 步骤 43/44：复制 /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf.template /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults .conf lstat opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf.template: 没有这样的文件或目录

Answer 1

您的容器中是否已有路径/opt/spark-2.2.1-bin-hadoop2.7/jars/？

如果在cp命令前不加这个：

mkdir -p /opt/spark-2.2.1-bin-hadoop2.7/jars/

然后尝试像这样复制：

cp gcs-connector-latest-hadoop2.jar /opt/spark-2.2.1-bin-hadoop2.7/jars/gcs-connector-latest-hadoop2.jar

修改后：

你运行mkdir 并尝试从中复制，因为文件夹是空的，所以这应该不起作用！！

Answer 2

为什么不直接下载到文件夹？并使用 COPY 复制容器内的文件COPY

RUN wget https://storage.googleapis.com/hadoop-lib/gcs/gcs-connector-latest-hadoop2.jar -P /opt/spark-2.2.1-bin-hadoop2.7/jars/
COPY /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf.template /opt/spark-2.2.1-bin-hadoop2.7/conf/spark-defaults.conf

假设：/opt/spark-2.2.1-bin-hadoop2.7/jars/folder 存在