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About the project

This project allows you to create a Kubernetes cluster on Proxmox VE using Terraform and Kubespray in a declarative manner.

Proxmox Kubernetes clusters

Prerequisites

Software requirements

Ensure the following software versions are installed:

Kubespray will be set up automatically.

System requirements

Before proceeding with the setup for Proxmox VE, make sure you have the following components in place:

  • Internal network
  • VM template
  • SSH key pair
  • Bastion host

Usage

Follow these steps to use the project:

  1. Clone the repo:

    $ git clone https://github.com/khanh-ph/proxmox-kubernetes.git

  2. Open the example.tfvars file in a text editor and update all the mandatory variables with your own values.

  3. Initialize the Terraform working directory.

    $ terraform init

  4. Generate an execution plan and review the output to ensure that the planned changes align with your expectations.

    $ terraform plan -var-file="example.tfvars"

  5. If you're satisfied with the plan and ready to apply the changes. Run the following command:

    $ terraform apply -var-file="example.tfvars"

Terraform configurations

The project provides several Terraform variables that allow you to customize the cluster to suit your needs. Please see the following:

Inputs

Name Description Type Default Required
env_name The stage of the development lifecycle for the k8s cluster. Example: prod, dev, qa, stage, test string "test" no
location The city or region where the cluster is provisioned string null no
cluster_number The instance count for the k8s cluster, to differentiate it from other clusters. Example: 00, 01 string "01" no
cluster_domain The cluster domain name string "local" no
use_legacy_naming_convention Whether to use legacy naming convention for the VM and cluster name. If your cluster was provisioned using version <= 3.x, set it to true bool false no
pm_api_url The base URL for Proxmox VE API. See https://pve.proxmox.com/wiki/Proxmox_VE_API#API_URL string n/a yes
pm_api_token_id The token ID to access Proxmox VE API. string n/a yes
pm_api_token_secret The UUID/secret of the token defined in the variable pm_api_token_id. string n/a yes
pm_tls_insecure Disable TLS verification while connecting to the Proxmox VE API server. bool n/a yes
pm_host The name of Proxmox node where the VM is placed. string n/a yes
pm_parallel The number of simultaneous Proxmox processes. E.g: creating resources. number 2 no
pm_timeout Timeout value (seconds) for proxmox API calls. number 600 no
internal_net_name Name of the internal network bridge string "vmbr1" no
internal_net_subnet_cidr CIDR of the internal network string "10.0.1.0/24" no
ssh_private_key SSH private key in base64, will be used by Terraform client to connect to the Kubespray VM after provisioning. We can set its sensitivity to false; otherwise, the output of the Kubespray script will be hidden. string n/a yes
ssh_public_keys SSH public keys in base64 string n/a yes
vm_user The default user for all VMs string "ubuntu" no
vm_sockets Number of the CPU socket to allocate to the VMs number 1 no
vm_max_vcpus The maximum CPU cores available per CPU socket to allocate to the VM number 2 no
vm_cpu_type The type of CPU to emulate in the Guest string "host" no
vm_os_disk_storage Default storage pool where OS VM disk is placed string n/a yes
add_worker_node_data_disk Whether to add a data disk to each worker node of the cluster bool false no
worker_node_data_disk_storage The storage pool where the data disk is placed string "" no
worker_node_data_disk_size The size of worker node data disk in Gigabyte string 10 no
vm_ubuntu_tmpl_name Name of Cloud-init template Ubuntu VM string "ubuntu-2404" no
bastion_ssh_ip IP of the bastion host, could be either public IP or local network IP of the bastion host string "" no
bastion_ssh_user The user to authenticate to the bastion host string "ubuntu" no
bastion_ssh_port The SSH port number on the bastion host number 22 no
vm_k8s_control_plane Control Plane VM specification object({ node_count = number, vcpus = number, memory = number, disk_size = number }) 
{
  "disk_size": 20,
  "memory": 1536,
  "node_count": 1,
  "vcpus": 2
}
 no
vm_k8s_worker Worker VM specification object({ node_count = number, vcpus = number, memory = number, disk_size = number }) 
{
  "disk_size": 20,
  "memory": 2048,
  "node_count": 2,
  "vcpus": 2
}
 no
create_kubespray_host Whether to provision the Kubespray as a VM bool true no
kubespray_image The Docker image to deploy Kubespray string "quay.io/kubespray/kubespray:v2.25.0" no
kube_version Kubernetes version string "v1.29.5" no
kube_network_plugin The network plugin to be installed on your cluster. Example: cilium, calico, kube-ovn, weave or flannel string "calico" no
enable_nodelocaldns Whether to enable nodelocal dns cache on your cluster bool false no
podsecuritypolicy_enabled Whether to enable pod security policy on your cluster (RBAC must be enabled either by having 'RBAC' in authorization_modes or kubeadm enabled) bool false no
persistent_volumes_enabled Whether to add Persistent Volumes Storage Class for corresponding cloud provider (supported: in-tree OpenStack, Cinder CSI, AWS EBS CSI, Azure Disk CSI, GCP Persistent Disk CSI) bool false no
helm_enabled Whether to enable Helm on your cluster bool false no
ingress_nginx_enabled Whether to enable Nginx ingress on your cluster bool false no
argocd_enabled Whether to enable ArgoCD on your cluster bool false no
argocd_version The ArgoCD version to be installed string "v2.11.4" no

Blog posts

For more detailed instructions, refer to the following blog post: Create a Kubernetes cluster on Proxmox with Terraform & Kubespray