CODEWITHSUNDEEP
rdockershinydockerfile
oska boska
oska boska

Reputation: 231

Give dockerized shiny application access to local volumes

I have a shiny application which I have containerised with Docker. Within the shiny application I use the shinyFiles library to allow the user to choose and upload a directory.

My server.R file looks something like this:

shinyServer(function(input, output, clientData, session) {
    volumes <- c("Home (~)" = '~', "Current directory" = getwd(), "Root (/)" = '/')
    shinyDirChoose(input, 'resultsLocation', roots=volumes, session=session)
})

and my ui.R file looks something like this:

library(shiny)
library(shinyFiles)
shinyUI(fluidPage(
    shinyDirButton('resultsLocation', 'Browse...', title = 'Select a directory')
))

This is fine if I run the app locally through R, however, if I build and run the docker container, the user cannot access their local volumes, and instead are stuck within the docker container.

I followed this guide to set up my docker container (with the addition of running chmod +x shiny-server.sh to make the file executable) and everything other than the volumes is working. My Dockerfile looks like this:

# Install R version 3.6.0
FROM r-base:3.6.0

# Install Ubuntu packages
RUN apt-get update && apt-get install -y \
    sudo \
    gdebi-core \
    pandoc \
    pandoc-citeproc \
    libcurl4-gnutls-dev \
    libcairo2-dev/unstable \
    libxt-dev \
    libssl-dev

# Download and install ShinyServer (latest version)
RUN wget --no-verbose https://s3.amazonaws.com/rstudio-shiny-server-os-build/ubuntu-12.04/x86_64/VERSION -O "version.txt" && \
    VERSION=$(cat version.txt)  && \
    wget --no-verbose "https://s3.amazonaws.com/rstudio-shiny-server-os-build/ubuntu-12.04/x86_64/shiny-server-$VERSION-amd64.deb" -O ss-latest.deb && \
    gdebi -n ss-latest.deb && \
    rm -f version.txt ss-latest.deb

# Install R packages that are required
RUN R -e "install.packages('shiny')"
RUN R -e "install.packages('shinyFiles')"

# Copy configuration files into the Docker image
COPY shiny-server.conf  /etc/shiny-server/shiny-server.conf
COPY /app /srv/shiny-server/

# Make the ShinyApp available at port 3838
# EXPOSE 3838

# Copy further configuration files into the Docker image
COPY shiny-server.sh /usr/bin/shiny-server.sh

# Allow permissions
RUN chown -R shiny:shiny /srv/shiny-server

CMD ["/usr/bin/shiny-server.sh"]

And I build and run the container with:

docker build -t shiny_docker_test . ; docker run -p 3838:3838 shiny_docker_test

So, my question is: how can I access my local filesystem/volumes through the dockerised shiny app with shinyFiles? I'm sure there is a simple solution, but I am new to all of this stuff.

Upvotes: 0

Views: 1130

Answers (1)

Aditya T
Aditya T

Reputation: 1733

Use docker volume feature. For example: In command line -v is used to map container directories with host directories

docker -v full_path_on_host:full_path_inside_container

Similarly, there is VOLUME keyword for same stuff while working on docker file.

Upvotes: 1

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