rocker/shiny missing library

[tah206]

I'm trying to run my shiny app on shiny-server but it's not working. The app works fine on my local machine.
Below are the steps I have followed:
on the remote computer terminal (Ubuntu 20.04)

$ sudo docker run --rm -p 3838:3838 -v /home/userid/app_folder/:/srv/shiny-server/sample-apps/new_app rocker/shiny

[2021-11-04T09:16:11.848] [INFO] shiny-server - Shiny Server v1.5.18.979 (Node.js v12.22.6)
[2021-11-04T09:16:11.851] [INFO] shiny-server - Using config file "/etc/shiny-server/shiny-server.conf"
[2021-11-04T09:16:11.901] [WARN] shiny-server - Running as root unnecessarily is a security risk! You could be running more securely as non-root.
[2021-11-04T09:16:11.906] [INFO] shiny-server - Starting listener on http://[::]:3838
[2021-11-04T09:16:16.773] [INFO] shiny-server - Created bookmark state directory: /var/lib/shiny-server/bookmarks
[2021-11-04T09:16:16.774] [INFO] shiny-server - Created user bookmark state directory: /var/lib/shiny-server/bookmarks/shiny

on the local browser:

ip-address:3838 gives "Welcome to Shiny Server!"

on remote terminal:

processing file: index.Rmd
output file: /tmp/Rtmpk7wmvg/file13e1e74ec9a/index.knit.md
Output created: /tmp/Rtmpk7wmvg/file13e1e74ec9a/index.html

but when I do this:
ip-address:3838/sample-apps/new_app

An error has occurred!
An error has occurred. Check your logs or contact the app author for clarification.

on the remote server terminal where the docker is running:

Listening on http://127.0.0.1:44947
Warning: Error in library: there is no package called ‘shinyjs’
  79: <Anonymous>
  
*** '/var/log/shiny-server//ewas-shiny-20211104-091653-44947.log' has been deleted ***

library loads fine
$ sudo R

library("shinyjs")

I have installed all the required libraries before running docker and I have tried with my own Dockerfile but nothing is working. Every time I get " An error has occurred! An error has occurred. Check your logs or contact the app author for clarification." and the log file is empty.

I would appreciate if someone can help me identify the problem.

[michaelmayer]

it looks like shinyjs is installed locally and works fine.

The problem that you are facing is that the shiny app is being executed within the docker container rocker/shiny and its only connection to your local PC is the availability of /home/userid/app_folder. So the docker container has no access to your local R installation (and "shinyjs") and hence your app fails to work with shinyjs.

There is various ways out of this but you need to make all the needed R libraries available within the docker container.

You can get a list of available R packages within the container via

docker run -ti rocker/shiny R -q -e "installed.packages()"