Lab 5 - Virtualization

[giselesikeh]

Goal

Complete Lab 5 by running QuickNotes inside a Vagrant-managed VirtualBox VM, documenting the VM lifecycle, and comparing the VM resource cost with a Docker container baseline.

Changes

• Added a root-level Vagrantfile for the Lab 5 QuickNotes VM.
• Configured an Ubuntu LTS VM with hostname quicknotes-vm.
• Configured NAT port forwarding from 127.0.0.1:18080 on the host to 8080 in the guest.
• Synced the host app/ directory into the VM at /home/vagrant/quicknotes/app.
• Capped VM resources at 2 vCPU and 1024 MB RAM.
• Added shell provisioning to install Go 1.24.5 inside the VM.
• Added submissions/lab5.md with Task 1, Task 2, and bonus documentation.
• Documented the snapshot save, break, restore, and recovery workflow.
• Documented VM vs Docker cold start, RAM, disk, and process-count comparison.
• Updated .gitignore to exclude local Vagrant/runtime artifacts and the local Go tarball.

Testing

Verified locally that:

• vagrant ssh -c "go version" returns go version go1.24.5 linux/amd64.
• QuickNotes builds and runs inside the VM.
• curl http://localhost:18080/health returns {"notes":7,"status":"ok"} from the host through port forwarding.
• A clean-quicknotes snapshot was created.
• Removing the Go installation broke the VM as expected.
• Restoring the snapshot recovered Go and QuickNotes successfully.
• Docker baseline was measured with QuickNotes running on port 28080.

Checklist

• Title is a clear sentence (≤ 70 chars)
• Commits are signed
• Vagrantfile added at repo root
• submissions/lab5.md updated
• .vagrant/ is ignored
• Local Go tarball is ignored