2  analysis.yml

2.1 The script

• Adds CRAN and Docker APT sources
• Installs packages for:
  • Python (pip, libraries)
• R (base, dev tools, packages)
• Installs Docker and Docker Compose
• Add security (fail2ban, ufw)
• Creates a user piet with sudo and Docker access
• Configures SSH on port 4444
• Saves a log as /var/log/cloud-init-output.log
• Sets up fail2ban and a firewall
• Installs Python and R packages
• Optionally adds swap space for R
• Installs a large set of R packages
• Installs Node.js for JavaScript-based services
• Installs npm for JavaScript package management
• Installs Express.js generator
• Creates a simple marker file to verify cloud-init completion

2.2 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

Help on R and Docker 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-r-on-ubuntu-14-04

• 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

• https://github.com/rocker-org/hadleyverse/blob/master/Dockerfile

• https://stackoverflow.com/questions/24418815/how-do-i-install-docker-using-cloud-init

Detailed explanations of lines of code for Node.js setup:

• git: Essential for version control and cloning repositories.

• nodejs and npm: Required for running and managing JavaScript packages.

• npm install -g npm@latest: Ensures you’re using the latest npm version, which can fix bugs and improve compatibility.

• express-generator: A helpful tool for quickly scaffolding Express.js applications.