无法在docker镜像中安装R包

Question

最近几天，我在docker镜像构建过程中遇到了安装R包的问题：

> install.packages("devtools", repos = "https://mran.microsoft.com/snapshot/2018-10-25")
Installing package into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
Warning: unable to access index for repository https://mran.microsoft.com/snapshot/2018-10-25/src/contrib:
  cannot open URL 'https://mran.microsoft.com/snapshot/2018-10-25/src/contrib/PACKAGES'
>
>
Warning message:
package ‘devtools’ is not available (for R version 3.4.4)

这是我的Dockerfile

FROM rocker/rstudio-stable:3.4.4

MAINTAINER Tazovsky

# system libraries of general use
RUN apt-get update && apt-get install -y \
    sudo \
    pandoc \
    pandoc-citeproc \
    pkg-config \
    libnlopt-dev \
    libcurl4-gnutls-dev \
    libcairo2-dev \
    libxt-dev \
    libgsl-dev \
    libssl-dev \
    libssh2-1-dev \
    libssl1.0.0 \
    libxml2-dev \
    openssl

RUN apt-get update && apt-get install -y \
    libmpfr-dev

RUN apt-get install libcurl4-openssl-dev -y

# install java
RUN apt-get update && apt-get install -y openjdk-8-jdk openjdk-8-jre
RUN R CMD javareconf

# r-java
RUN apt-get install r-cran-rjava -y

RUN R -e 'install.packages("devtools", repos = "https://mran.microsoft.com/snapshot/2018-10-25")'

我确信它在早些时候(几周前)起作用了。

另外，我检查了命令

install.packages("devtools", repos = "https://mran.microsoft.com/snapshot/2018-10-25")

在本地，它是有效的。

我还尝试通过运行以下命令来添加CA证书：

本地：

openssl genrsa -des3 -out myCA.key 2048
openssl req -x509 -new -nodes -key myCA.key -sha256 -days 1825 -out myCA.pem

在Dockerfile中

CP myCA.pem /tmp/myCA.pem
RUN cd tmp && \
    openssl x509 -in myCA.pem -inform PEM -out myCA.crt && \
    cp myCA.crt /usr/local/share/ca-certificates/myCA.crt && \
    update-ca-certificates && \
    rm -rf /tmp/*

但这并不管用。

知道是怎么回事吗？

Answer 1

你可以试着改变(这对我很有效)

install.packages("devtools", repos = "https://mran.microsoft.com/snapshot/2018-10-25") 

至

install.packages("devtools", repos = "http://cran.rstudio.com/")