# R integration¶

Due to the large number of additional system dependencies, DSS R integration is not installed by default.

You can install R integration at any time.

## Prerequisites¶

DSS requires R version 3.4 to 3.6. R version 4.x is not supported.

Note

On some platforms (notably, at the time of writing, SLES 15 systems) the version of R available through the system package manager may not be compatible with DSS.

In that case, automatic installation of R itself by the DSS installer is not possible, and integrating DSS with R requires manually installing a compatible version of R.

On macOS, you must first install R from http://www.r-project.org/. Note that you might need to also install XQuartz.

## Case 1: Automatic installation, if your DSS server has Internet access¶

This procedure installs the required R packages and configures R integration for DSS. It prompts you to install any missing dependency as root if needed. Internet access (direct or through a proxy) may be needed to download missing packages.

• Go to the DSS data dir

cd DATADIR

• Stop DSS

./bin/dss stop

• Run the installation script

./bin/dssadmin install-R-integration


Note

The install-R-integration script automatically checks for any missing system dependencies. If any is missing, it will give you the command to run to install them with superuser privileges. After the installation of dependencies is complete, you can retry the install-R-integration script

• Start DSS

./bin/dss start


Note

The above procedure downloads missing R packages from a default Internet-based repository using the HTTPS protocol. If required, you can switch to another repository (CRAN mirror) by specifying option -repo REPO_URL, as in:

./bin/dssadmin install-R-integration -repo http://cran.univ-paris1.fr


Note

If the DSS server has Internet access only through a web proxy, you can configure it using the standard http_proxy and/or https_proxy environment variables, as follows:

export http_proxy=http://PROXY_HOST:PROXY_PORT
export https_proxy=http://PROXY_HOST:PROXY_PORT


## Case 2: If your DSS server does not have Internet access¶

To help with R package installation when the DSS server does not have Internet access (directly nor through a proxy), the DSS installation kit includes a standalone script which may be used to download the required set of R package sources on a third-party Internet-connected system, and store them to a directory suitable for offline installation on the DSS server.

• Check for missing system dependencies on the DSS server, including the base R system, the development tools, and libraries required by the mandatory R packages. If any dependency is missing, you will need to install it from a local package repository for your OS distribution.

dataiku-dss-VERSION/scripts/install/install-deps.sh -check -without-java -without-python -with-r

• Retrieve the standalone download script dataiku-dss-VERSION/scripts/install/download-R-packages.sh and transport it to the system which you will use for download. This system should run Linux or macOS, should have R installed, and should have Internet connection, directly or through a proxy.

./download-R-packages.sh -dir DIR


where DIR is a temporary directory which will hold the downloaded packages.

• Transport the resulting directory DIR to the DSS server.

• On the DSS server, install any missing R packages from this download directory, and finish configuring DSS R integration:

DATADIR/bin/dssadmin install-R-integration -pkgDir DIR

• Restart DSS

DATADIR/bin/dss restart


Note

The download-R-packages.sh can be run with additional command-line arguments naming R packages. It will then download these packages along with their dependencies in addition to the mandatory set of packages required by DSS.

This can be used to install additional R packages to DSS on a server without Internet access, by running DATADIR/bin/R and calling install.packages(PACKAGE_NAME, repos = "file://PATH_TO_PKGDIR_DIRECTORY")

## Case 3: Custom installation¶

Installing DSS R integration consists in the following steps, which you can perform in any way suitable to your environment:

• Install R on the DSS server (version 3.4 to 3.6)

Data Science Studio references it by looking up “R” in the PATH. If needed, you can override this by defining environment variable DKURBIN in the local customization file DATADIR/bin/env-site.sh.

• Install the following R packages, either in the global R library, or in the user library of the DSS user account:

Packages

Repository

httr RJSONIO dplyr curl IRkernel sparklyr ggplot2 gtools tidyr rmarkdown base64enc filelock

CRAN (https://cran.r-project.org)

• Configure DSS R integration, with the option which omits the default dependency check, and restart DSS

cd DATADIR
./bin/dss restart


## Troubleshooting¶

### Rebuilding the R environment¶

In case a system upgrade of the DSS host installed a new version of R (for example: R 3.4.x to R 3.5.x), DSS-installed R packages may become incompatible and stop working properly.

You should then force a full rebuild of all R environments, as follows:

#### Rebuilding the default R environment¶

• Rename the DATADIR/R.lib directory into DATADIR/R.lib.BAK

• Replay the dssadmin install-R-integration command using one of the methods above, to reinstall all required R packages from scratch

• Optionally, check the DATADIR/R.lib.BAK directory for additional packages which you would have manually installed, and reinstall those as well

• Restart DSS

• Once R has been checked to work correctly, remove the backup directory.

#### Rebuilding managed R code environments¶

You should force a full rebuild of all R-based managed code environments by navigating to the Administration / Code Envs page, opening each R environment, selecting “Rebuild env” and clicking “UPDATE”.

Warning

If any R packages were manually installed in the default R library (typically, by calling “install.packages()” from a R session run by the root account), they may need to be reinstalled as well.

### macOS¶

Some R versions (notably the one coming through Homebrew) are configured to use source packages by default rather than binary packages. If you leave this option, automatic installation may fail as you need the development tools installed, and quite a number of additional libraries.

If you get a compilation error when installing one of the missing packages while running install-R-integration, you may try to manually install the binary version of this package instead. At the R prompt:

options(pkgType="both")
install.packages("PACKAGE_NAME", repos = "http://cloud.r-project.org/")


Then run the install-R-integration command again.

### Anaconda R¶

An alternative to the above is to use the Anaconda R distribution, and install the required R packages using conda install. You will need to set the DKURBIN environment variable to the fully-qualified path to the R entry point of the corresponding conda environment so that DSS uses it instead of the default R command.