Rocker/Shiny not seeing apps after reboot - docker

Question

What can be the reason for rocker/shiny to not recognize shiny apps in host OS?
I'm using rocker/shiny to experiment with shiny apps on windows.
This is how I start the image:
docker run -d -p 80:3838 -v D:/Projects/DockedShiny/apps/:/srv/shiny-server/ -v D:/Projects/DockedShiny/logs:/var/log/shiny-server/ rocker/shiny
I can see shiny was started:
C:\Users\Honza>docker logs gallant_thompson
*** warning - no files are being watched ***
[2019-02-08T06:49:04.860] [INFO] shiny-server - Shiny Server v1.5.9.1 (Node.js v8.11.3)
[2019-02-08T06:49:04.887] [INFO] shiny-server - Using config file "/etc/shiny-server/shiny-server.conf"
[2019-02-08T06:49:04.927] [WARN] shiny-server - Running as root unnecessarily is a security risk! You could be running more securely as non-root.
[2019-02-08T06:49:04.931] [INFO] shiny-server - Starting listener on http://[::]:3838
Edit: Anybody has any hints what *** warning - no files are being watched *** exactly means? I have suspition this might be a clue.
By inspecting the configuration I can see it's configured to files and folders that I specified during image startup:
root#778e307632ab:/etc/shiny-server# more shiny-server.conf
# Instruct Shiny Server to run applications as the user "shiny"
run_as shiny;
# Define a server that listens on port 3838
server {
listen 3838;
# Define a location at the base URL
location / {
# Host the directory of Shiny Apps stored in this directory
site_dir /srv/shiny-server;
# Log all Shiny output to files in this directory
log_dir /var/log/shiny-server;
# When a user visits the base URL rather than a particular application,
# an index of the applications available in this directory will be shown.
directory_index on;
}
}
Despite this the shiny web directory listing is empty and when specifying app by name (e.g. http://localhost/myapp) I'm getting 'page not found'. There is no new logs in Shiny log location.
The exact same scenario worked just fine for months. I recently needed to reboot my host machine and now I cannot make shiny to recognize my apps.

Answer 1

Server is complaining about running as root. I'd start by adding --user shiny. Also you're not sticking to a particular version but latest, and I can see the rocker/shiny image was updated a few days ago, so it could be broken or work different than previous version. I'd stick to 3.5.1 or whatever version you prefer, like rocker/shiny:3.5.1.

Answer 2

LSS: The issue was in recently changed username on affected machine. Docker is caching old one and that needed to be explicitly reset in docker settings -> Shared Drives menu
More details: https://github.com/rocker-org/shiny/issues/59