OCI Free Tier Kubernetes Cluster

Deploy a (nearly) free Kubernetes cluster on Oracle Cloud Infrastructure (OCI) utilizing the free tier resources.

Overview

This repository contains Infrastructure as Code (IaC) configurations for setting up a Kubernetes cluster on OCI's free tier resources. The setup includes all necessary components for running a Kubernetes cluster, including ingress configuration through Cloudflare Tunnels, monitoring using Prometheus and Grafana and Clickhouse deployment.

Prerequisites

• Oracle Cloud Infrastructure (OCI) Account
  • Free tier eligible
  • Account must be verified
  • Credit card required for verification (won't be charged for free tier resources)
• Cloudflare Account
  • Free tier is sufficient
  • Cloudflare Tunnel access
• Registered domain name
  • Will be used for configuring ingress through Cloudflare Tunnels

Cost Considerations

While this setup primarily uses free tier resources, there are some potential costs to be aware of:

Free Components

• Kubernetes control plane
• Worker nodes (within free tier limits)
• Network resources (VCN, subnets, security lists)

Paid Components

• Persistent volumes for ClickHouse deployment
  • Can be avoided if ClickHouse is not required
  • Costs vary based on volume size and type

Getting Started

1. Clone this repository:

   git clone https://github.com/botiven/oci-infra-terraform
   cd oci-kubernetes-cluster

2. Configure terraform variables - terraform.tfvars

3. Initialize the project:

   terraform init

4. Review and deploy the cluster:

   terraform plan    # Review the changes
   terraform apply   # Deploy the infrastructure

5. After deployment: Kubernetes configuration file will be generated in the project root directory

6. Traefik ingress will be using Cloudflare Tunnel and can be accessed at https://kube.example.com (replace example.com with domain configured in terraform.tfvars).