User virtual machines on VLAB servers

Proposed user-defined virtual machine setup for VLAB servers. Not operational.

Implement and run a user-defined virtual machine (VM).

CD/ISO files and virtual hard disk files location

The CD/ISO files and virtual hard disk files used by the user-created virtual machines must actually be located somewhere under /usr/local/uservms on the host where the VMs will be run. If not, vmexec will give an error when you try to run the VM. Symlink-ing to locations outside of this directory will cause the same error.

Programs

Program name	Description
qemu-img	Create a virtual hard disk (file).
vmexecmkdir	Create a directory for the user in /usr/local/uservms.
vmexec	Run a virtual machines, booting either from a supplied CD/ISO image or from virtual hard disk.

vmcreatedisk

Do we really need this? Can't users just run qemu-img instead?

Usage: vmcreatedisk [options] <disk0>

-h Display this help
-s Size of new virtual hard disk in megabytes. Conflicts with -b
-b Backing image for virtual hard disk. Conflicts with -s

<disk0> virtual hard disk path for new disk

vmrun

Usage: vexec [options] [<disk0> [<disk1> ...]]

-h Display this help
-m RAM megabytes (128/2048 - default 1024)
-n virtual CPUs (1/2 - default 1)
-i CD/ISO file path
-I boot from CD/ISO instead of virtual hard disk

<diskn> virtual hard disk path

vmrun runs a user-defined virtual machine using qemu/KVM.

• The machine will be configured for "user" networking, meaning it will be on its own private subnetwork. It will be able to connect externally using Network Address Translation (NAT) but will not be reachable itself from external hosts (including from the server the virtual machine is running on). The VM will see the network interfaces as an Intel E1000 card.
• It will have a graphical console.
• The [virtual] CPU will be Intel. There can be a maximum of TWO per VM.

Scribbles

Installing qemu-system-x86_64 package on nw-syd-armvx1:

Start-Date: 2023-06-01  14:04:59
Commandline: apt-get install qemu-system-x86
Install: qemu-system-x86:arm64 (1:5.2+dfsg-11+deb11u2), ovmf:arm64 (2020.11-2+deb11u1, automatic), libcapstone4:arm64 (4.0.2-3, automatic), libvdeplug2:arm64 (4.0.1-2, automatic), libbrlapi0.8:arm64 (6.3+dfsg-1+deb11u1, automatic), libexecs0:arm64 (1.3-1, automatic), libspice-server1:arm64 (0.14.3-2.1, automatic), ipxe-qemu:arm64 (1.0.0+git-20190125.36a4c85-5.1, automatic), libusbredirparser1:arm64 (0.8.0-1+b1, automatic), seabios:arm64 (1.14.0-2, automatic), libcacard0:arm64 (1:2.8.0-3, automatic), qemu-system-common:arm64 (1:5.2+dfsg-11+deb11u2, automatic), libvirglrenderer1:arm64 (0.8.2-5+deb11u1, automatic), qemu-system-data:arm64 (1:5.2+dfsg-11+deb11u2, automatic), qemu-system-gui:arm64 (1:5.2+dfsg-11+deb11u2, automatic)
End-Date: 2023-06-01  14:05:04