Terraform KVM provider incorrectly using IPv6 address

Terraform Providers
1

I am trying to get Terraform to create a VM on a KVM machine. It creates the VM but terraform is trying to connect to the VM with an IPv6 address of fe80::3e26:223c:7a13:fc9b. The machine I am running this on had IPv6 disabled in multiple locations and it is showing no IPv6 addresses if I run ip a. The config in my main.tf file contains no IPv6 addresses and I specify only IPv4 addresses. Right off the bat if I run terraform apply it says it’s going to create a VM with the above IPv6 address. I have specified to use an IPv4 address. When it fails, after a few mins, it fails with “timeout - last error: dial tcp [fe80::3e26:223c:7a13:fc9b]:22: socket: address family not supported by protocol”

The only thing I can find on the net is this page, but there is no resolution and no fix from Hashicorp in the 3 years since it was raised.

terraform {
required_version = “>= 0.13”
required_providers {
libvirt = {
source = “dmacvicar/libvirt”
}
}
}

provider “libvirt” {
uri = “qemu:///system”
}

module “vm” {
source = “MonolithProjects/vm/libvirt”
version = “1.8.0”

vm_hostname_prefix = “server”
vm_count = 1
memory = “2048”
vcpu = 1
pool = “default”
system_volume = 100
dhcp = false
ip_address = [ “10.236.37.246” ]
ip_gateway = “10.236.37.1”
bridge = “br0”
local_admin = “vagrant”
ssh_admin = “ci-user”
ssh_private_key = “/home/centos/.ssh/id_rsa”
local_admin_passwd = var.admin_password
ssh_keys = [
“ssh-rsa xxxxxxx”
]
time_zone = “CET”

os_img_url = “file:///vmdata/templates/tdhtest”
}

output “outputs” {
value = module.vm
}

$ terraform apply
module.vm.data.template_file.init_config[0]: Reading…
module.vm.data.template_file.network_config[0]: Reading…
module.vm.data.template_file.init_config[0]: Read complete after 0s [id=15be391f115d29c18b33e06e0faf17454cdcf961c59984bc9a590ec431a99265]
module.vm.data.template_file.network_config[0]: Read complete after 0s [id=21c35b5b423842cb572e738e09a0c19419a19226fd62699cb07acf16448fabfb]
module.vm.data.template_cloudinit_config.init_config[0]: Reading…
module.vm.data.template_cloudinit_config.init_config[0]: Read complete after 0s [id=3178718758]
module.vm.libvirt_cloudinit_disk.commoninit[0]: Refreshing state… [id=/vmdata/pools/default/server_init 1.iso;dbc8ac22-6cc0-47a4-a2f0-2ef59548e54b]
module.vm.libvirt_volume.base-volume-qcow2[0]: Refreshing state… [id=/vmdata/pools/default/server-base.qcow2]
module.vm.libvirt_volume.volume-qcow2[0]: Refreshing state… [id=/vmdata/pools/default/server01.qcow2]
module.vm.libvirt_domain.virt-machine[0]: Refreshing state… [id=06d37f4f-0e15-4bb2-b83f-9c8b0241230d]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
-/+ destroy and then create replacement

Terraform will perform the following actions:

module.vm.libvirt_domain.virt-machine[0] is tainted, so must be replaced

-/+ resource “libvirt_domain” “virt-machine” {
~ arch = “x86_64” → (known after apply)
- cmdline = → null
~ emulator = “/usr/libexec/qemu-kvm” → (known after apply)
~ id = “06d37f4f-0e15-4bb2-b83f-9c8b0241230d” → (known after apply)
~ machine = “pc” → (known after apply)
name = “server01”
# (7 unchanged attributes hidden)

  ~ graphics {
      - websocket      = 0 -> null
        # (4 unchanged attributes hidden)
    }

  ~ network_interface {
      ~ addresses      = [
          - "fe80::3e26:223c:7a13:fc9b",
        ] -> (known after apply)
      ~ mac            = "52:54:00:A2:3A:41" -> (known after apply)
      + network_id     = (known after apply)
      + network_name   = (known after apply)
        # (3 unchanged attributes hidden)
    }

    # (4 unchanged blocks hidden)
}

Plan: 1 to add, 0 to change, 1 to destroy.

Changes to Outputs:

  • outputs = {
    • ip_address = [
      • (known after apply),
        ]
    • name = [
      • “server01”,
        ]
        }

Do you want to perform these actions?
Terraform will perform the actions described above.
Only ‘yes’ will be accepted to approve.

Enter a value: yes

module.vm.libvirt_domain.virt-machine[0]: Destroying… [id=06d37f4f-0e15-4bb2-b83f-9c8b0241230d]
module.vm.libvirt_domain.virt-machine[0]: Destruction complete after 0s
module.vm.libvirt_domain.virt-machine[0]: Creating…
module.vm.libvirt_domain.virt-machine[0]: Still creating… [10s elapsed]
module.vm.libvirt_domain.virt-machine[0]: Provisioning with ‘remote-exec’…
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Connecting to remote host via SSH…
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Host: [fe80::3e26:223c:7a13:fc9b]
module.vm.libvirt_domain.virt-machine[0] (remote-exec): User: ci-user
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Password: false
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Private key: true
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Certificate: false
module.vm.libvirt_domain.virt-machine[0] (remote-exec): SSH Agent: false
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Checking Host Key: false
module.vm.libvirt_domain.virt-machine[0] (remote-exec): Target Platform: unix
module.vm.libvirt_domain.virt-machine[0]: Still creating… [2m10s elapsed]
â•·
│ Error: remote-exec provisioner error
│
│ with module.vm.libvirt_domain.virt-machine[0],
│ on .terraform/modules/vm/main.tf line 71, in resource “libvirt_domain” “virt-machine”:
│ 71: provisioner “remote-exec” {
│
│ timeout - last error: dial tcp [fe80::3e26:223c:7a13:fc9b]:22: socket: address family not supported by protocol
╵

2

You have not included the contents of your Terraform configuration file for the thing that is failing. The file name is included in the error message.

3

I included my main.tf file contents at the top. Is there something else I should include?

4

I did find a partial solution which was to use the libvirt provider directly.