Docker容器中的r应用程序:无法下载PDF报告(错误:没有此类文件或目录)

Question

我一直在为一个R应用程序构建一个坞容器，并在下载PDF报告时不断地遇到错误。PDF报表函数在本地机器上的R中工作得很好，但是当容器化时，它会抛出下面的错误。我尝试过强制安装特定的软件包，即Knitr和Rmarkdown，就像其他问题提到的那样，但是它仍然显示出相同的错误。Chrome下载中的文件简单地写着“失败-服务器问题”。我已经用这个应用程序测试了CSV文件的下载，所以我认为这是一个生成和下载标记PDF报告的问题。

我已经包括了构建Dockerfile来协助。任何建议都会令人惊奇！

谢谢!

DOCKERFILE：

FROM openanalytics/r-base

MAINTAINER ________

# system libraries of general use
RUN apt-get update && apt-get install -y \
    sudo \
    pandoc \
    pandoc-citeproc \
    libcurl4-gnutls-dev \
    libcairo2-dev \
    libxt-dev \
    libssl-dev \
    libssh2-1-dev \
    libxml2-dev \
    libssl1.0.0 \
    libpq-dev \
    git \
    texlive-full \
    html-xml-utils \
    libv8-3.14-dev

# system library dependency for the app

RUN apt-get update

# install packages for R

RUN R -e "install.packages(c('hms','devtools'), repos='https://cloud.r- 
project.org/')"

RUN R -e "require(devtools)"

RUN R -e "install.packages(c('car'), repos='https://cloud.r-project.org/')"

RUN R -e "devtools::install_version('readxl', version = '1.0.0', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('DT', version = '0.2', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('shinydashboard', version = '0.6.1', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('knitr', version = '1.18', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('magrittr', version = '1.5', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('ggrepel', version = '0.7.0', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('dplyr', version = '0.7.4', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('Rcpp', version = '0.12.14', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('rhandsontable', version = '0.3.4', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('shinyjs', version = '0.9.1', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('V8', version = '1.5', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('data.table', version = '1.10.4-3', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('packrat', version = '0.4.8-1', 
repos='https://cloud.r-project.org/')"
RUN R -e "devtools::install_version('zoo', version = '1.8-1', 
repos='https://cloud.r-project.org/')"
RUN R -e "install.packages('shiny', repos='https://cloud.r-project.org/')"
RUN wget https://github.com/rstudio/rmarkdown/archive/v1.8.tar.gz
RUN R CMD INSTALL v1.8.tar.gz
RUN R -e "install.packages('xml2', repos='https://cloud.r-project.org/')"
RUN R -e "install.packages('rvest', repos='https://cloud.r-project.org/')"
RUN wget https://cran.r- 
project.org/src/contrib/Archive/kableExtra/kableExtra_0.3.0.tar.gz
RUN R CMD INSTALL kableExtra_0.3.0.tar.gz

# copy the app to the image
RUN mkdir /root/tsk
COPY tsk /root/tsk

COPY Rprofile.site /usr/lib/R/etc/

EXPOSE 3838

CMD ["R", "-e", "shiny::runApp('/root/tsk')"]

来自码头的错误：

Listening on http://0.0.0.0:3838
Warning in normalizePath(path, winslash = winslash, mustWork = mustWork) :
  path[1]="/tmp/RtmpMu8ezy/TSK.Rmd": No such file or directory
Warning: Error in tools::file_path_as_absolute: file '/tmp/RtmpMu8ezy/TSK.Rmd' 
does not exist
  [No stack trace available]
Warning in normalizePath(path, winslash = winslash, mustWork = mustWork) :
  path[1]="/tmp/RtmpMu8ezy/TSK.Rmd": No such file or directory
Warning: Error in tools::file_path_as_absolute: file '/tmp/RtmpMu8ezy/TSK.Rmd' 
does not exist
  [No stack trace available]
Warning in normalizePath(path, winslash = winslash, mustWork = mustWork) :
  path[1]="/tmp/RtmpMu8ezy/TSK.Rmd": No such file or directory
Warning: Error in tools::file_path_as_absolute: file '/tmp/RtmpMu8ezy/TSK.Rmd' 
does not exist
  [No stack trace available]

Answer 1

只需将文件名从tsk.Rmd更改为TSK.Rmd --原因是在IDE中的OSX上总是进行测试，它不会抛出任何错误，但是当使用区分大小写的Ubuntu构建容器时，它无法找到标记文件。

当使用不同的操作系统构建时，一定要检查系统是否区分大小写！一个容易犯的错误！