Question

我想扩展docker（postgresql-96-centos7）以添加Java。我尝试构建下一个dockerfile：

error   17-Jul-2018 18:44:45    18:44:45.846 WARN: [/home/myuser/server/RequestHandler.h:5]: cannot find the sources for '#include <string>'
error   17-Jul-2018 18:44:45    18:44:45.847 WARN: [/home/myuser/server/RequestHandler.h:6]: cannot find the sources for '#include <iostream>'
error   17-Jul-2018 18:44:45    18:44:45.847 WARN: [/home/myuser/server/RequestHandler.h:7]: cannot find the sources for '#include <algorithm>'
error   17-Jul-2018 18:44:45    18:44:45.847 WARN: [/home/myuser/server/RequestHandler.h:8]: cannot find the sources for '#include <memory>'

使用命令：

FROM centos/postgresql-96-centos7

RUN yum update -y && \
yum install -y wget && \
yum install -y java-1.8.0-openjdk && \
yum clean all

# Set environment variables.
ENV HOME /root

# Define working directory.
WORKDIR /root

# Define default command.
CMD ["bash"]

但是有一个错误：

docker image build -t centos_pgs_java .

如何用root用户权限重写dockerfile中的RUN命令？

Answer 1

根据Dockerfile文档：

USER指令设置用户名（或UID），并可选地设置运行映像以及任何RUN，CMD时要使用的用户组（或GID）以及Dockerfile中紧随其后的ENTRYPOINT指令。

因此，您需要将用户更改为root，执行RUN层，并将用户返回到26码头工人镜像中定义的centos/postgresql-96-centos7。

最后的Dockerfile是：

FROM centos/postgresql-96-centos7

USER root

RUN yum update -y && \
yum install -y wget && \
yum install -y java-1.8.0-openjdk && \
yum clean all

USER 26

# Set environment variables.
ENV HOME /root

# Define working directory.
WORKDIR /root

# Define default command.
CMD ["bash"]

用postgres和java构建docker

1 个答案: