Feature/lab5

[BearAx]

Goal

Complete Lab 5 by running QuickNotes inside a reproducible Vagrant VM, validating service access from both the VM and host, practicing snapshot recovery, and documenting the VM-vs-container bonus comparison.

Changes

• Added submissions/lab5.md

• Added a Vagrantfile for running QuickNotes inside an Ubuntu 22.04 Vagrant VM

• Configured the VM with:

  • generic/ubuntu2204 base box
  • VirtualBox provider
  • 2 CPUs and 1024 MB RAM
  • forwarded port 127.0.0.1:18080 → guest :8080
  • synced ./app folder mounted at /opt/quicknotes/app

• Added shell provisioning to:

  • install required packages
  • install pinned Go 1.24.5
  • build the QuickNotes binary
  • create and enable a quicknotes.service systemd unit

• Documented vagrant up, vagrant validate, VM health checks, host forwarded-port checks, and systemd service status

• Completed the snapshot task by saving, breaking, restoring, and revalidating the VM

• Added answers to the Vagrant networking, synced folder, provisioning, Go version pinning, and snapshot design questions

• Completed the bonus comparison between the Vagrant VM and a Docker container

Testing

• Validated the Vagrantfile with vagrant validate
• Brought up the VM with vagrant up
• Verified Go inside the VM with vagrant ssh -c 'go version'
• Verified QuickNotes health inside the VM with:

vagrant ssh -c 'curl -s http://localhost:8080/health'

• Verified QuickNotes health from the host through the forwarded port with:

curl -s http://localhost:18080/health

• Verified the systemd service with:

vagrant ssh -c 'systemctl --no-pager --full status quicknotes.service | sed -n "1,8p"'

• Saved a clean VM snapshot with vagrant snapshot save quicknotes-clean
• Broke the VM by moving /usr/local/go away
• Confirmed the breakage with go: command not found
• Restored the VM snapshot and confirmed that Go and QuickNotes recovered successfully
• Compared VM and Docker startup time, idle RAM, disk size, and process count for the bonus task

Checklist

• Title is a clear sentence
• Commits are signed
• Vagrantfile added
• submissions/lab5.md updated
• VM boots successfully
• QuickNotes runs inside the VM
• Host-to-guest port forwarding works
• quicknotes.service is enabled and running
• Snapshot save/break/restore flow documented
• Snapshot design questions answered
• Bonus VM-vs-Docker comparison included