Feature Limits

Posit Workbench has a number of other limits that can be configured. This section describes these limits.

Important

The settings discussed in this section are specified in the /etc/rstudio/rsession.conf file (rather than the rserver.conf file).

Note that these settings are specified in the /etc/rstudio/rsession.conf file (rather than the rserver.conf file previously referenced).

Disabling access to features

In addition to the limits on package installation and CRAN repository editing described in Package Installation, there are a number of other limits that can be specified in /etc/rstudio/rsession.conf. The following describes all of the options that can be used in rsession.conf to limit features.

allow-vcs: Allow access to Git and SVN version control features.
allow-vcs-executable-edit: Allow editing of the underlying Git or SVN executable.
allow-package-installation: Allow installation of packages using the Packages Pane (note that even if this is set to 0 it’s still possible to install packages using utils::install.packages from the command line).
allow-r-cran-repos-edit: Allow editing of the CRAN repository used for package downloads (note that it’s still possible to specify an alternate repository using the repos parameter of utils::install.packages).
allow-shell: Enable integrated terminal feature (note that it’s still possible to execute shell commands using the system function).
allow-terminal-websockets: Allow integrated terminal feature to use WebSockets for better responsiveness.
allow-file-downloads: Allow downloading files using the Export command in the Files Pane.
allow-file-uploads: Allow uploading files using the Upload command in the Files pane.
allow-external-publish: Allow content to be published to external (cloud) services. This includes publishing HTML documents created with R Markdown or R Presentations to RPubs (http://rpubs.com), and publishing Shiny applications and documents to ShinyApps.io (http://shinyapps.io). Note that this just removes the relevant user interface elements in the IDE, and that it may still be possible for users to publish content using the R console.
allow-publish: Allow content to be published. If specified, this option removes all user interface elements related to publishing content from the IDE, and overrides allow-external-publish.
allow-launcher-jobs: Allow running standalone ad hoc Job Launcher jobs from the Jobs pane.

All of these features are enabled by default. Specify 0 to disable access to the feature.

Note that these options should be specified in the /etc/rstudio/rsession.conf configuration file (rather than the main rserver.conf configuration file).

Maximum file upload size

You can limit the maximum size of a file upload by using the limit-file-upload-size-mb setting. For example, the following limits file uploads to 100MB:

/etc/rstudio/rsession.conf

limit-file-upload-size-mb=100

The default behavior is no limit on the size of file uploads.

CPU time per computation

If you want to prevent runaway computations that consume 100% of the CPU you can set the maximum number of minutes to allow top-level R computations to run for using the limit-cpu-time-minutes setting. For example:

/etc/rstudio/rsession.conf

limit-cpu-time-minutes=30

This specifies that no top level computation entered at the R console should run for more than 30 minutes. This constraint is implemented by calling the R setTimeLimit function immediately prior to handing off console commands to R. As a result it is possible for a particular script to override this behavior if it knows that it may exceed the threshold. This would be done as follows:

setTimeLimit(cpu = Inf)
# Long running R code here...

XFS disk quotas

If your system uses the XFS file system (http://en.wikipedia.org/wiki/XFS) then Posit Workbench can be configured to notify users when they come close to or exceed their disk quota. You can enable this using the limit-xfs-disk-quota setting. For example:

/etc/rstudio/rsession.conf

limit-xfs-disk-quota=1

The user’s XFS disk quota will be checked when the RStudio Pro IDE loads and a warning message will be displayed if they are near to or over their quota.