Episode 16 of the InventiveHQ KVM virtualization series.
Lab verified July 2026 · Ubuntu 26.04 · libvirt 12.0.0 · QEMU 10.2.1
What this episode proves
- Build a reusable base without embedded secrets
- Generate unique NoCloud identity and network data
- Create two guests from independent overlays
- Prove unique UUIDs, MACs, hostnames, machine IDs, SSH keys, and addresses
Validated workflow
1. Build a reusable base without embedded secrets
./provision-cloud-vm.sh ep16-app01 52:54:00:77:16:01 192.168.122.61 ~/.ssh/id_ed25519.pub
2. Generate unique NoCloud identity and network data
cloud-init status --long
3. Create two guests from independent overlays
virsh domuuid ep16-app01
4. Prove unique UUIDs, MACs, hostnames, machine IDs, SSH keys, and addresses
ssh-keygen -lf /etc/ssh/ssh_host_ed25519_key.pub
Finished state
The sanitized base and cloud-init templates remain; disposable proof guests are removed. The public scripts contain no private keys, passwords, or tokens. Review names, addresses, paths, ownership, backups, quorum, and fencing for your own environment before running them.