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RAUL TAPARA YANGALI
RAUL TAPARA YANGALI

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🚀 StackOpsys: Part 2-Automating Kubernetes Infrastructure on Proxmox with Packer, Terraform and Ansible

In the first part of StackOpsys, we built a secure, cloud-init-ready image for Kubernetes using Packer. Now it’s time for Part 2: automating the creation of Kubernetes cluster infrastructure using Terraform on Proxmox VE.

🧱 What’s included in this phase?

✅ Creation of VMs (master + workers) based on the custom Ubuntu 22.04 template

✅ Modular structure with a reusable vms_proxmox Terraform module

✅ Network bridge configuration, fixed IPs, and cloud-init enabled

✅ Support for multiple environments (dev, QA, prod) using .tfvars

📦 Technologies

  • 🧰 Terraform 1.8+
  • ☁️ Proxmox VE 8.3.3+
  • 🐧 Ubuntu Server 22.04 LTS

📁 Project Structure Overview 

terraform/
├── environments/
│   ├── dev.tfvars
│   └── prd.tfvars
├── modules/
│   ├── vms_proxmox/
│   └── tools_k8s/
├── main.tf
├── variables.tf
├── outputs.tf
├── providers.tf
└── .github/workflows/terraform.yaml
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⚙️ Configuration Examples

Proxmox Access 

proxmox = {
  endpoint  = "https://192.168.100.100:8006/api2/json"
  username  = "root"
  password  = "your_password"
  api_token = "root@pam!iac-tf=your_token"
}
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Cluster & VMs 

cluster = {
  name     = "cluster-kubeadm"
  gateway  = "192.168.100.1"
  cidr     = 24
  endpoint = "192.168.100.220"
}

vms = {
  "k8s-master-01" = {
    ip            = "192.168.100.220"
    cpu           = 4
    ram_dedicated = 4096
    file_id       = "directory:9001/base-9001-disk-0.qcow2"
  }
}
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🚀 Usage Steps

1. Initialize Terraform 

terraform init
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2. Plan 

terraform plan -var-file=environments/dev.tfvars
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plan

3. Apply 

terraform apply -var-file=environments/dev.tfvars
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apply

4. Destroy (optional) 

terraform destroy -var-file=environments/dev.tfvars
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🔐 Outputs 

cluster_name = "cluster-kubeadm"
vm_ipv4_address_vms = [
  "192.168.100.220/24",
  "192.168.100.223/24",
  "192.168.100.224/24"
]
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🔄 GitHub Actions Pipeline

Includes:

  • Terraform init/plan/validate/apply
  • Secrets stored securely in GitHub
  • Reproducible infrastructure builds

✅ What’s next?

In Part 3, we’ll use Ansible to:

  • Install required packages on each VM
  • Configure kubeadm on the master node
  • Join the worker nodes automatically
  • Deploy networking (e.g., Calico) and additional tools

📖 Full code and documentation on GitHub

Follow along and let me know what you'd add!

DevOps #Terraform #Kubernetes #IaC #Proxmox #Ansible #CI/CD #CloudInit #StackOpsys

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