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virt-install-cloud

What is this all about

It is a collection of bash script easily setup and destroy cloud-init enabled virtual machines locally.

Actively being used on:

  • Ubuntu 20.04 LTS
  • Ubuntu 22.04 LTS

Required packages (Ubuntu)

  • cloud-image-utils

Configuration

In the templates directory

cp cloud-config.yml-example cloud-config.yml
cp launch-vm.ini-example launch-vm.ini

Modify the launch-vm.ini to match your libvirtd settings.

Modify the cloud-config.yml to include your username password and ssh pubkey

Example of creating a new virtual machine

sudo ./bin/launch-vm.sh  -d almalinux8 -c 2 -m 2048 -s 32 -n AlmaLinux8 -f

Resolving libvirt machines locally

Install the libnss-libvirt package.

In /etc/nsswitch.conf after files add libvirt libvirt_guest

After this you should be able to ping and ssh to your virtual machine based on their name.

Additional useful information

Useful commands

- virt-resize --expand /dev/sda1 centos8-org.img centos8.img
- virt-filesystems --long -h --all -a centos8.img
- virsh net-dhcp-leases default

Loopback mounting qcow2 images

modprobe nbd max_part=63
qemu-nbd -c /dev/nbd0 disk.img
mount /dev/nbd0p1 /mnt/disk
umount /mnt/disk
qemu-nbd -d /dev/nbd0

Thanks to our contributors

  • rotflol (Ronald Offerman)