Example file for managing 2 ubuntu servers on KVM by terraform.

NOTE: This is for my reference. I do not recommend to use it in a production environment.

For simplifying the explanation, the figure omits some technical details, for instance, the interface name connected to the external network, etc.

Each VM has 2 interfaces: end3 and ens4.

• ens3 is connected to the external network
• ens4 is for the management interface.
  • Terraform automatically create a virtual network named mgmt0.
  • br-mgmt0 will be automatically created on host OS by terraform.

We assume that host OS has br0 interface (it is used for bridging external network)

• Network range is 192.168.128.0/24
• Gateway address is 192.168.128.1
• No DHCP

By default, terraform creates 2 users (defined in cloud_init.cfg in each directory)

• user (with sudo): terraform / UserPassword!
• root: root / RootPassword!

Before running this, you need to install terraform-provider-libvirt.

All the following command should be run as root.

Setup VM and network

terraform init
terraform apply

Delete VM and network created by terraform

terraform destroy