Running Dash for R apps inside ShinyProxy

Screenshots

This repository explains how to run Dash for R apps in ShinyProxy. You will need to use at least ShinyProxy 2.5.0.

Dash requires the knowledge of the path used to access the app. By default the dashr package reads the DASH_REQUESTS_PATHNAME_PREFIX environment variable to determine this path, therefore you do not have to change your R code. You only have to make sure that you do not overwrite this value and that the R server listens on 0.0.0.0. You can do this either by using the following R code:

app$run_server(host = "0.0.0.0", port = 8050)

or using the following code and setting the HOST environment variable to 0.0.0.0 (as is in done in our example):

app$run_server()

Building the Docker image

To pull the image made in this repository from Docker Hub, use

sudo docker pull openanalytics/shinyproxy-dash-for-r-demo

The relevant Docker Hub repository can be found at https://hub.docker.com/r/openanalytics/shinyproxy-dash-for-r-demo.

To build the image from the Dockerfile, navigate into the root directory of this repository and run

sudo docker build -t openanalytics/shinyproxy-dash-for-r-demo .

ShinyProxy Configuration

Create a ShinyProxy configuration file (see application.yml for a complete file), containing:

proxy:
  specs:
    - id: dashr-demo
      container-image: ledfan/shinyproxy-dash-r
      port: 8050
      container-env:
        # Use the following line when using ShinyProxy 2.6.0 or later
        DASH_REQUESTS_PATHNAME_PREFIX: "#{proxy.getRuntimeValue('SHINYPROXY_PUBLIC_PATH')}"
        # Use the following line when using ShinyProxy 2.5.0
        # DASH_REQUESTS_PATHNAME_PREFIX: "#{proxySpec.containerSpecs[0].env.get('SHINYPROXY_PUBLIC_PATH')}"

Screenshots

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