Dockerfile副本："lchown .不是目录“

Question

试图构建这个Dockerfile：

FROM dockerfile/ubuntu

RUN apt-get update && apt-get install -y apache2

COPY proxypass.conf /etc/apache2/sites-available
COPY caching.conf /etc/apache2/conf-available
RUN a2ensite proxypass \
    && a2enconf caching \
    && a2disconf serve-cgi-bin

EXPOSE 80

CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

proxypass.conf和caching.conf文件与Dockerfile一起位于apache目录中。

运行docker build将提供以下输出：

$ sudo docker build -t me/apache apache
Sending build context to Docker daemon  29.7 kB
Sending build context to Docker daemon 
Step 0 : FROM dockerfile/ubuntu
 ---> 77f8745ed183
Step 1 : RUN apt-get update && apt-get install -y apache2
 ---> Using cache
 ---> d62d92d91591
Step 2 : COPY proxypass.conf /etc/apache2/sites-available
2014/10/16 09:02:32 lchown /u01/docker/devicemapper/mnt/38bcd5cca695b4e9ac9af77e0342f85dea9fb10a238f7bd5173289bb956cf5c8/rootfs/etc/apache2/sites-available/proxypass.conf: not a directory

这是OracleLinux6.5(本质上是CentOS 6.5)。

$ sudo docker info
Containers: 1
Images: 113
Storage Driver: devicemapper
 Pool Name: docker-8:2-1308404-pool
 Data file: /u01/docker/devicemapper/devicemapper/data
 Metadata file: /u01/docker/devicemapper/devicemapper/metadata
 Data Space Used: 4307.1 Mb
 Data Space Total: 102400.0 Mb
 Metadata Space Used: 5.5 Mb
 Metadata Space Total: 2048.0 Mb
Execution Driver: native-0.2
Kernel Version: 2.6.32-358.23.2.el6.x86_64
Username: kgutwin
Registry: [https://index.docker.io/v1/]

Answer 1

Dockerfile COPY指令的文档如下：

如果没有以尾随斜杠结尾，则它将被视为一个常规文件，其内容将被写入。

因此，只需为目标目录添加一个/，您就可以构建映像：

COPY proxypass.conf /etc/apache2/sites-available/
COPY caching.conf /etc/apache2/conf-available/