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Talos on vSphere

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The terraform-vsphere-talos module that can be used to build a Talos based, fully compliant, Kubernetes cluster, using VMware vSphere and terraform. Providing a (relatively) few variables will automatically spin up talos infrastructure on your vsphere environment.

This module has been heavily inspired by @masoudbahar https://github.com/masoudbahar/terraform-virtualbox-talos.

Requirements

  • Terraform > 0.13.x
  • An existing vSphere environment with enough resources
  • talosctl commandline tool to generate the necessary certificates (eventually terraform will be able to handle this)
    • You can also provide your own certificate values instead of letting the script generate them

Usage

Check out the examples directory for full configurations.

Required for your Module

The terraform_vsphere_provider needs to be declared in your project. The minimum you must provide:

provider "vsphere" {
  user           = var.vsphere_user
  password       = var.vsphere_password
  vsphere_server = var.vsphere_server

  # If you have a self-signed cert
  allow_unverified_ssl = true
}

The required module variables: (Please read the terraform registry documentation for the full list of available inputs)

Variable Type Description
controlplane_nodes number The number of control plane nodes (between 1 and 3) you want to have in your cluster
worker_nodes number The number of woker nodes you want in your cluster
vsphere_datacenter string The name of the datacenter in vSphere you want the cluster to be deployed to
vsphere_resource_pool string The name of the resource pool you want the cluster to be deployed to
vsphere_datastore string The name of the datastore you want the cluster to be deployed to
vsphere_host string The name of the host you want to cluster to be deployed to (this won't be required in the future if you specify a resource pool)
vsphere_cluster string The cluster the talos cluster will be deployed to
vsphere_network string The network you want to connect the talos cluster VMs to
talos_cluster_endpoint string The load balancer IP or DNS name of the cluster endpoints
ip_gateway string The gateway address for the node network
ip_netmask string The CIDR notation for the node network (this will be improved in a future release)
dns_domain string The node (not kubernetes cluster) dns domain
ip_address_base string The first 3 octets of your node network IE: 192.168.80. This will be improved in a future release
controlplane_ip_address_start string The final octet of the IP address for the first controlplane server IP IE: 20 The way this is being done is dumb. This will be fixed in a future release
worker_ip_address_start string The final octet of the IP address for the first worker server IP IE: 120. Will be fixed in a future release

Talos expects base64 encoded certificates and tokens in order to bootstrap the cluster. This module will eventually be able to generate these values without using talosctl, but for now, these values needed to be provided to the module. This script will generate the required certificates and output a terraform compatible file with the required fields.

Paste the generated values in the module or provide your own values.

talos_crt
talos_key
kube_crt
kube_key
etcd_crt
etcd_key
admin_crt
admin_key
talos_token
kube_token
kube_enc_key

Configuration Values

See the terraform-vsphere-talos inputs page for the full list of available inputs.

Features

Limitations

Compatability