4  shiny-server.yml

4.1 Set up a Shiny server on Ubuntu 20.04

• without SSL certificate
• see https://cloud.r-project.org/bin/linux/ubuntu/ for the choice of the Ubuntu version
• also check the shiny server version number at https://www.rstudio.com/products/shiny/download-server/ubuntu/

4.2 Checks

Some checks to do after the cloud-init script has finished:

• (SSH) Is SSH key added? sudo nano ~/.ssh/authorized_keys
• (SSH) Has port changed from 22 to 4444? sudo nano /etc/ssh/sshd_config
• (Nginx) Is the content of the server block written to the file that is included in the Nginx config file /etc/nginx/conf.d? sudo nano /etc/nginx/sites-enabled/default
• Are .deb files deleted? sudo ls -l /var/cache/apt/archives
  • If not, apply sudo apt-get clean (source: https://www.jverdeyen.be/ubuntu/digital-ocean-ubuntu-free-up-disk-space/)
• (sed) Check sed syntax at https://sed.js.org/index.html, this tool was used to solve the issue with port 4444 (see commit w/ hash fcb426dd536952ce929329a865d737660d12f112)

4.3 References

Help on cloud-init syntax from:

• https://cloudinit.readthedocs.io/en/latest/topics/examples.html

• https://www.digitalocean.com/community/tutorials/how-to-use-cloud-config-for-your-initial-server-setup

  • (ERROR: THE ssh-authorized-keys (AND sudo) SYNTAX IS WRONG IN ALL DIGITAL OCEAN EXAMPLES, SEE NEXT REFERENCE)

• https://superuser.com/questions/1725127/invalid-config-for-cloud-init-but-apparently-still-works-how-do-i-remove-the

• https://github.com/andrewheiss/cloud-config-files

Help on Shiny server installation syntax from:

• http://deanattali.com/2015/05/09/setup-rstudio-shiny-server-digital-ocean/

• https://www.digitalocean.com/community/tutorials/how-to-set-up-shiny-server-on-ubuntu-20-04

• https://gist.github.com/mdlincoln/1f40f4e88ce32c55b5f3

• https://gist.github.com/mdlincoln/1f40f4e88ce32c55b5f3#gistcomment-3009981

• https://cran.rstudio.com/bin/linux/ubuntu/fullREADME.html#using-apt-key