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Environment variables on RStudio Connect

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A common requirement is to adjust the LD_LIBRARY_PATH or add additional environment variables on all Connect applications to allow certain R packages or other resources to work with your deployed applications.  For example: ROracle, Gurobi, Hadoop, etc.

We suggest placing these environment variable changes into the program supervisor script, this way it's set in the shell prior to the application process starting.  This is critical for the LD_LIBRARY_PATH edits to take effect.  

Note: If you only need the environment variable available after the R process starts (e.g. if it contains a password or secret, instead of a path modification), the best practice is to use the environment variable pane instead. 

 

To implement, follow these steps:

1.  Create a directory to store your program supervisor script.  Note that this directory must be accessible by the sandbox.  Below is an ideal directory example:

mkdir -p /opt/scripts

2.  Example script contents to edit for your needs:

cat /opt/scripts/connect-env.sh

#!/bin/bash

echo arguments: "$@"
echo

export GUROBI_HOME="/opt/gurobi700/linux64"
export PATH="${PATH}:${GUROBI_HOME}/bin"
export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${GUROBI_HOME}/lib"

exec "$@"


3.  Allow access to the file with:  chmod 755 /opt/scripts/connect-env.sh

4.  Add the following to /etc/rstudio-connect/rstudio-connect.gcfg

[Applications]
Supervisor = /opt/scripts/connect-env.sh


Once complete, restart the RStudio Connect service then attempt to deploy or access the existing application.

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