This small setup can be used to provision Flatcar nodes on your Linux laptop with the libvirt provider.
A new disk volume pool will be created in /var/tmp as precaution to not modify the base image by accident.
First, prepare the base image and make sure you don't boot it via the flatcar_production_qemu.sh script or similar:
cd ~/Downloads
wget https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_qemu_image.img.bz2
bunzip2 flatcar_production_qemu_image.img.bz2
mv flatcar_production_qemu_image-libvirt-import.img
# optional, increase the image by 5 GB:
qemu-img resize flatcar_production_qemu_image-libvirt-import.img +5G
It will only be used once for the import and can be deleted afterwards even when new VMs are added.
Edit the Container Linux Config cl/machine-mynode.yaml.tmpl file if you like, then create the following terraform.tfvars with a machine mynode, corresponding to the Container Linux Config file name. If you add more machines, create new files for them under cl/.
base_image = "file:///home/myself/Downloads/flatcar_production_qemu_image-libvirt-import.img"
cluster_name = "mycluster"
machines = ["mynode"]
virtual_memory = 768
ssh_keys = ["ssh-rsa AA... [email protected]"]
Now run Terraform (version 13) as follows:
terraform init
terraform apply
View the VMs in virt-manager where you can see the VGA console.
Log in via ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null core@IPADDRESS.
When you make a change to cl/machine-mynode.yaml.tmpl and run terraform apply again, the instance and its disk will be replaced.