在 Docker 容器上运行管道工 API

Question

我想在 Docker 容器上运行管道工 API。

我尝试了以下两个dockerfile：

第一个 Dockerfile

FROM rstudio/plumber
MAINTAINER Docker User <docker@user.org>
RUN R -e "install.packages('broom')"
RUN mkdir -p ~/application

# copy everything from the current directory into the container
COPY "/" "application/"
WORKDIR "application/" 

# open port 80 to traffic
EXPOSE 80

# when the container starts, start the main.R script
ENTRYPOINT ["Rscript", "execute_plumber.R"]

第二个 Dockerfile：

FROM rocker/r-ver:4.0.2

# install the linux libraries needed for plumber
RUN apt-get update -qq && apt-get install -y \
  libssl-dev \
  libcurl4-gnutls-dev

# install plumber
RUN R -e "install.packages('plumber')"
RUN mkdir -p ~/application

# copy everything from the current directory into the container
COPY "/" "application/"
WORKDIR "application/" 

# open port 80 to traffic
EXPOSE 80

# when the container starts, start the main.R script
ENTRYPOINT ["Rscript", "execute_plumber.R"]

它们都导致了以下错误：

* Downloading renv 0.12.0 from CRAN archive ... OK
* Installing renv 0.12.0 ... Done!
Successfully installed and loaded renv 0.12.0.
Error in library(plumber) : there is no package called ‘plumber’
Execution halted

在第二个 Dockerfile 的情况下，我还尝试安装不同的 linux 库，例如

git-core
libcurl4-openssl-dev
xml2 openssl

他们都没有帮助。

我在 Azure 上运行它。有什么建议吗？

更新 在容器构建日志文件中，我可以清楚地看到plumber 已成功安装。

> install.packages('plumber')
Installing package into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
also installing the dependencies ‘curl’, ‘Rcpp’, ‘later’, ‘BH’, ‘rlang’, ‘glue’, ‘R6’, ‘stringi’, ‘jsonlite’, ‘webutils’, ‘httpuv’, ‘crayon’, ‘promises’, ‘sodium’, ‘swagger’, ‘magrittr’, ‘mime’, ‘lifecycle’

...

* DONE (plumber)

Answer 1

在这个输出中：

> install.packages('plumber')
Installing package into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
also installing the dependencies ‘curl’, ‘Rcpp’, ‘later’, ‘BH’, ‘rlang’, ‘glue’, ‘R6’, ‘stringi’, ‘jsonlite’, ‘webutils’, ‘httpuv’, ‘crayon’, ‘promises’, ‘sodium’, ‘swagger’, ‘magrittr’, ‘mime’, ‘lifecycle’

...

* DONE (plumber)

看起来软件包正在安装到 R 站点库中，但在这里：

* Downloading renv 0.12.0 from CRAN archive ... OK
* Installing renv 0.12.0 ... Done!
Successfully installed and loaded renv 0.12.0.
Error in library(plumber) : there is no package called ‘plumber’
Execution halted

项目的 renv 自动加载器（通常是项目 .Rprofile 的一部分）正在运行，这会将您的项目设置为使用私有库路径（与您的站点库隔离）。

我怀疑您可以通过重新组织 Dockerfile 中的命令来解决此问题；例如

FROM rocker/r-ver:4.0.2

# install the linux libraries needed for plumber
RUN apt-get update -qq && apt-get install -y \
  libssl-dev \
  libcurl4-gnutls-dev

# create the application folder
RUN mkdir -p ~/application

# copy everything from the current directory into the container
COPY "/" "application/"
WORKDIR "application/" 

# open port 80 to traffic
EXPOSE 80

# install plumber
RUN R -e "install.packages('plumber')"

# when the container starts, start the main.R script
ENTRYPOINT ["Rscript", "execute_plumber.R"]

换句话说，确保在设置工作目录后调用install.packages("plumber")。